POOR DYNO RESULT 16v

[sexy_gt]

this afternoon i have been to my local dyno. saxo vts 2000 (97 engine 100k on it)
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/roller001.jpg

modifications are

milltek 4-2-1
saxsport decat 2"
c2 simota induction

i also have
baffled sump
mocal oil cooler
quaife box
billet flywheel
alloy crank/alternator pulley
(catcams 708) not fitted yet

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/roller005.jpg

peak rmp of 6,326 was 114.6bhp and 99.8 lb ft at 5,106 :oops:

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/roller008.jpg

the power curve is very good. almost perfect only the peak is a little low.

the exhaust lambda sensor they clip in the exhaust gave an unreadable result and tripped the sensor itself. apparently normal for a decat?

i have no engine management lights on, i have no smoke exit the exhaust throughout the run and it appears to be in good health. plugs are new :y:

compression test be required? could it require a remap due to the flow of the intake and exhaust? since fitting the exhaust ive felt a decent power increase.

the car feels strong and is used very regular on track. it never uses oil or
water.

i have a new set of catcams to go in then i am looking at some new management

ideas or comments welcome :geek:

[Mochachino]

Still almost a standard engine. May have given a low figure on any other rolling road, but maybe this rolling road gives a lower figure generally?

How many runs did you have?

At least you have a Rolling Road result and print out to compare it when you have the cams put in and mapped etc. Can see your true gain rather than going off the book bhp and the gain from that.

[sexy_gt]

yes exactly to be able to compare. only 5 minutes from my place. very convenient. i had 3 runs.

i do trust the rollers to be accurate and honest. a friend had his standard zafira 2.0 16v (random!) run same day gave 1hp less than book figure.

loads on here get 135+ with same/similar mods. makes you think other dynos lie.

im going back for a run when i have fit the cams. then again when im back from my remap. at the mo i am going to chipwizards. looking forward to comparing dyno results.

[Russ_16v]

Did it feel underpowered? Have you noticed a lack of power?

If no, then I wouldnt worry, every RR will give a different reading - example is two iv been on, one have 193 bhp, the other 209 bhp.

If it pulls well, is healthy (as you say it is) then dont let it bother you mate, did it bother you before the run, did you have this done becauase you felt like there is something wrong with it?

Bear in mind, some small things can effect power, ie my filter kept sliding down my itb trumpets, and we didnt realise and was stumped why the car wouldnt make over 180bhp - we stopped the filter sliding and the next run was well over 190bhp

[sexy_gt]

had a run because im doing a series of mods.

im quite pally with the garage owner so i get runs cheap.

[Russ_16v]

then id use it as a base mate, and not worry about it :)

[sexy_gt]

it can only get better i suppose :)

[Russ_16v]

on other RR's I expect it might read more mate :)

[sexy_gt]

cmon all you 150 brake standard vts lads on here. get your arses over to grimsby and get rolled...

[Colin]

That power @ fly? Or wheels?

Standard vts's make about 95-97bhp at the wheels.

[sexy_gt]

fly mate... as far as i am aware.

[Fulch]

Mine is a VTR 1998 90 from factory.

It has

Raceland 4-2-1 Mani Wrapped
100 cell Sports cat
Uni Back Box
Viper forced induction

and on the last dyno in May it was 103.1

You have a lot more mods then me and only a little more BHP. I'm still waiting to put my decat back on and also my S1 Rallye inlet which I'm hoping to gain something from them.

[Liam_]

I wouldn't look into it too much, if it all tbh.

[Azzybonjela]

my mate had a vtr, ragged to shit, 140,000 miles, 5 inch backbox, 65bhp !!!

[Azzybonjela]

but on a plus side your car looks sik !!!

[Mochachino]

my mate had a vtr, ragged to shit, 140,000 miles, 5 inch backbox, 65bhp !!!

i lolled

[Gareth_R]

where do other peoples power usually peak? if the graph compares well to similar other cars then i wouldnt worry - the final figure depends on how they calculate the transmission losses as well

[sexy_gt]

transmission not counted. i asked what it would be at the wheels. he said -20% ish
this is at the fly

[yr51ocw]

stu - where in gy did you have it tested. I have always gone to boston to have power runs done.

And how much do they charge?

[Gareth_R]

lol they take the wheel figure and apply transmission losses to get the fly figure

so they've got a wheel figure, either applied a standard 20% loss or used the overrun to calculate a 20% loss (sounds like they've just called it 20%). Then taken the wheel figure, divided by 80, times by 100, theres your 114 bhp

different places will apply a different figure, some will do a proper calculation on the overrun, iirc Northampton Motorsport showed mine as an 18bhp loss, cant remember how they calculated it.

So if you went somewhere else you could get a higher or lower figure depending on how the transmission losses are worked out (although this wont be the only factor obviously)

[yr51ocw]

^ ignore my other post, i can see in the pics that its rasp.

How much do they charge for a set of runs?

[sexy_gt]

lol they take the wheel figure and apply transmission losses to get the fly figure

this one does not show graph or give details for wheel power. 1st thing i asked was what the wheel power. i was told "this doesnt give wheel figures. its about 20% less"...

i can only tell you what ive been told ;)

[sexy_gt]

^ ignore my other post, i can see in the pics that its rasp.

How much do they charge for a set of runs?

£45 inc vat.

[Gareth_R]

sorry added some more info afterwards,

a dyno works by measuring the power at the wheels - they just havent given it to you

[sexy_gt]

lol they take the wheel figure and apply transmission losses to get the fly figure

so they've got a wheel figure, either applied a standard 20% loss or used the overrun to calculate a 20% loss (sounds like they've just called it 20%). Then taken the wheel figure, divided by 80, times by 100, theres your 114 bhp

different places will apply a different figure, some will do a proper calculation on the overrun, iirc Northampton Motorsport showed mine as an 18bhp loss, cant remember how they calculated it.

So if you went somewhere else you could get a higher or lower figure depending on how the transmission losses are worked out (although this wont be the only factor obviously)

explination appreciated :y:

[Mochachino]

lol they take the wheel figure and apply transmission losses to get the fly figure

so they've got a wheel figure, either applied a standard 20% loss or used the overrun to calculate a 20% loss (sounds like they've just called it 20%). Then taken the wheel figure, divided by 80, times by 100, theres your 114 bhp

different places will apply a different figure, some will do a proper calculation on the overrun, iirc Northampton Motorsport showed mine as an 18bhp loss, cant remember how they calculated it.

So if you went somewhere else you could get a higher or lower figure depending on how the transmission losses are worked out (although this wont be the only factor obviously)

Dont they work out the fly power from after hitting the limit or peak power they let the car de-accelarate and its the rate it de-accelarates they do some maths and work out the flywheel bhp or something?

[ryanmt]

Yeah they use the drag on the rollers

[titchster]

Yup, like they've said dude, rollers measure wheel hp (think about where it's measuring from), and then use maths (usually calculating a 15-20% loss for FWD) to give flywheel power.

The only way to get an accurate flywheel reading is on an engine dyno.



Either way, the car proves itself to be fast, so whether it's making less peak power than others or not, it's obviously not a great hindrance.

[AndySAXO]

Nms dyno cala the tranny lose on the down run!

Also by the look of it they use a dd type dyno, which is pre cala the tranny lose not on the down run.

It also depends how it calibrated, the dd type us logd cells to do it, where as nmp use weights, a load cell has to be calibrated itself that could be incorrect from the start.

I been on two same dynos at two different companys, and my torque was the same my bhp had increase 6 bhp, but first time was when the engine had done 500 miles secone it had done 2000 miles so think the increase was due to the engine opening up more.

Wouldnt say it was to bad, and if the engine get a lot of track days and 100k could be starting to wear now.

The peak rpm is low for standard vts normally 6.6k,

I wouldnt worry to much if it still drives well then just drive it.

[axsaxoman]

std vts should give max power at around 6700-6800 ,so the rpm must not have been calibrated correctly ,as for actual power ,if as already siad they just add 20% and do not do a run down to get transmission losses ,then maybe theres your reason ,also how hot was the dyno bay .
if air temp AT t/body was up in the high 40,s then theres another 3-5% loss at least ..
normal figure i would expect is around 95 'wheels ,but there again what gear oil + are you sure your box is goood ,so many possibilites for these readings , maybe even a bit of wheelspin at highe rpm and that would acount for max power being shown at wrong rpm

[sexy_gt]

very interesting replies.

i do remember the operator doing a calibration run.

coldnt give you a temperature figure but it was cold in the workshop watching :)

as for wheelspin i had the 888's on. very loud on the rollers.

the gearox has only covered 2,000 miles since new bearings and quaife fitment. i did have an issue with the box but it turned out to be the clutch not releasing properly.

does the box need more miles to run in? its seen 600 track miles and 1,400 road.

[Gareth_R]

i would expect a box to be running well after 2k miles

the power band between peak torque and peak bhp is quite narrow as well, i had peak torque at 5500 and peak power at 7k and have been told that 1500 rev is a good range from peak torque to bhp

as for why you're getting those results, maybe its the LSD (just throwing the idea in) and its behaving differently on the rollers, but the gains you'll get from having the LSD will far outweigh the losses on a piece of paper

if it drives well, i wouldnt worry too much

[saxo_ron]

I had my saxo on the rollers with a diff fitted and it made no difference to figures.

I normally wouldnt worry about rr figures at all as they all vary, but did you say similar vts' on the same rollers make 130-135bhp?

But truthfully probably nothing to worry about, the width or pressure of tyres could have effected the result

[sexy_gt]

^^ a local with vts btb exhaust and manifold makes 130 every time. he has no atb and similar milage.

[jzink]

Mine was remapped and rolling road tested at chip wizards, he is very good spent 5hts doing mine including knife edge on throttle butterfly valve for free! The best £350 I Spey on my car, especially as mine is the harder to remap 3pin Ecu that very few people can map! Cams mak a huge difference s standard a vts should be 120bhp at flyso if less with mods is probably under reading! I know mine is quick as easily out drags stripped 172 clio cups on long straights at Bedford and 182 clio as well! Don't read to much intonit mate and don't worry! Rake it to another rollers before mods and see if different before mods

[sexy_gt]

going to stick to my local mate.

(not doing bedford on the 6th nov?)

[jonathon5]

what fuel did you have in it ?

[sexy_gt]

regular unleaded.

[AndySAXO]

what fuel did you have in it ?

Not really going to make a difference, the high octane fuel is better but really wouldnt make much of a difference.

[Gareth_R]

Vts engines are able to adjust ignition timing according to what fuel you use, would make a minor difference, nothin major

[jonathon5]

Vts engines are able to adjust ignition timing according to what fuel you use, would make a minor difference, nothin major

My car deffo feels better on super, but we are only talking a few bhp really.

When i fitted my induction kit the car lost top end power, but felt more torquey

I had an Evo that never did amazing numbers on the Dyno,

Cars that made 30- 40 bhp more than my car on the same dyno were slower out on the road ?

[moxy89]

My 03 vts got a very reliable figure i feel. It serviced around every 3k,

green panel filter
421 mani
piper cat back
and a full service before run and it made 126.6bhp

[sexy_gt]

cams going in within the next week. will be back for another run and map

[-shuggles-]

that would boost figures up:y:

any trackdays coming up? woud like to see what it can do with more power:p

[sexy_gt]

got 3 booked/left this year.

bedford 6th nov
snett 20th nov
caddie 4th dec

[Oc2]

My car deffo feels better on super, but we are only talking a few bhp really.

When i fitted my induction kit the car lost top end power, but felt more torquey




Same... top end power seems to be lacking in my VTR, hits 100 comfortably, anything over it reeally seems to struggle
Yes i realise i probably hasnt got much more to give, but considering my mates 1.25 zetec S hit 110 with 4 of us, one would hope

30 - 70 is amazing though


http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs357.snc3/29454_397655340667_602620667_4735334_57165_n.jpg
Was lifted from an impreza with a 73mm to 62mm reducer pipe

[-shuggles-]

Same... top end power seems to be lacking in my VTR, hits 100 comfortably, anything over it reeally seems to struggle
Yes i realise i probably hasnt got much more to give, but considering my mates 1.25 zetec S hit 110 with 4 of us, one would hope

30 - 70 is amazing though


http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs357.snc3/29454_397655340667_602620667_4735334_57165_n.jpg
Was lifted from an impreza with a 73mm to 62mm reducer pipe

would it not make more sense having the air feed coming from the other side instead of over the mani?

[Oc2]

would it not make more sense having the air feed coming from the other side instead of over the mani?


No room :/ 4" cold air feed, its now off though, it never actually touched the mani but kinda defeats the objective of having a 'cold air feed' when heat from the mani heats the pipe up, i dont normally drive it for very long though so it never gets that hot, with the car being stop start

[AndySAXO]

which cams should be around 135-145 dude... who mapping it? mapping on the standard ecu?

[sexy_gt]

brand new 708's andy sorting me with a predator. considering holding it a month to get some atpower bodies.

[AndySAXO]

yer sound good, who mapping it?

[axsaxoman]

would it not make more sense having the air feed coming from the other side instead of over the mani?


why would you think that pipe would supply cold air anyway -80% of surface area of filter is open to hot air from engine bay --
air will always come the easiest way it can ,so that cold air pipe is quite frankly pointless --sorry

[sexy_gt]

yer sound good, who mapping it?

luthor1 (andy) ;)

[jonathon5]

why would you think that pipe would supply cold air anyway -80% of surface area of filter is open to hot air from engine bay --
air will always come the easiest way it can ,so that cold air pipe is quite frankly pointless --sorry

For real ? Hot air = less power

What about just whacking an air filter straight onto the throttle body & Putting in a bonnet scoop above ?

[Oc2]

why would you think that pipe would supply cold air anyway -80% of surface area of filter is open to hot air from engine bay --
air will always come the easiest way it can ,so that cold air pipe is quite frankly pointless --sorry

Hense it being taken off ;P as said

[AndySAXO]

luthor1 (andy) ;)

will give you a very good map.

[-shuggles-]

why would you think that pipe would supply cold air anyway -80% of surface area of filter is open to hot air from engine bay --
air will always come the easiest way it can ,so that cold air pipe is quite frankly pointless --sorry

thought a good cold air feed would of been better than none at all? not clue'd up on the whole induction kit side of things.

[henryvtr]

my mk 1 vtr with straight exhaust-decat-mani- induction-lightened standard fly and fast road clutch and home ported throttle body made 93.18 bhp at 5500rpm and 100.93 ft-lb torque at 2600rpm. dynod on dynojet dyno at janspeed and they will only give you wheel figures, he said flywheel is estimated by others. car goes very well. think must be around 115bhp at fly tho and was 90 before. car only done 50k so would expect to be healthy anyway

[titchster]

93bhp @ the wheels roughly translates to 103/105bhp @ fly using 17% transmission loss.

[sexy_gt]

93bhp @ the wheels roughly translates to 103/105bhp @ fly using 17% transmission loss.

my rr operator quoted 20% so at 17% i could be little more?

dont know if to be gutted at the low figure or be pleased with how well it does :panic:

[johnnyg_vts]

if your car runs ok, pulls well and doesnt seem particularly slow then i wouldnt worry about a singular rolling road result with a million variables.

[axsaxoman]

Hense it being taken off ;P as said

I think you are missing the point --unless the filter assembly is totally enclosed so it can ONLY draw air from an unrestricted cold source then the pipe is a waste of time .

[AndySAXO]

yep listen to the info... even with the cold air feed, the air filter will still draw some off the hot air in from the engine bay!!

unless it totally enclosed... i.e. bmc type or racland type ones, will work better to get no heat soak from the engine bay.

[sexy_gt]

i have this one
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/newbay.jpg

simota. bought to fit a c2.

[AndySAXO]

see that will work alot better than just an cold air feed.. with an open type filter.

[sexy_gt]

5 weeks after this result i had a drive shaft joint give in. i do wonder if it was ill when i had the power run.

it could well of been strangling the rpm/wheel power...

[ryanmt]

doubtful it would make any difference tbh

[Saaamon]

I don't like the fact dd's guess the flywheel figure. Was it on the right settings? My friend has a 16v with 4-2-1 and filter etc and made similar results to you on dd's. After changing the filter to a different type whilst still strapped on the power jumped up to 130ish. Just like you he thought that it was fine before and that there was no problems.

[axsaxoman]

flywheel figure is always a sort of guess ,as all any dyno can do is measure power at wheels --the fly figure is a calculation of some sort--how accurate is the guessing bit
as a guide most saxo ma g/boxs take around 23-26bhp i

[adam19]

I don't like the fact dd's guess the flywheel figure. Was it on the right settings? My friend has a 16v with 4-2-1 and filter etc and made similar results to you on dd's. After changing the filter to a different type whilst still strapped on the power jumped up to 130ish. Just like you he thought that it was fine before and that there was no problems.

since then i threw the airfilter i had on it as it was restricting my car instead of gaining :)

[loudandproud205]

people forget that mass area of an open filter over enclosed.

Stu i threw that simota set up in the in and went with an ecosse green set up on my saxo, increased across the full rev range and was so much better to drive.

oh and if sucking hot in was that much of an issue all of the itb boys have wasted there money then as the inlet is on the wrong side and well its either cut the scuttle panel for stale cool air or warm air under the bonnet.

after all rickyp proved that a single inlet could still make the 'high bhp figures'

[moxy89]

take the results with a pinch of salt mate, normal they a loads of rubbish anyway, you could go to another rolling road and get 150bhp, ie the rolling road at french car show people where making 140bhp with a mani and exhuast and 135lb of tq. Not going to happen.. take them with a pinch of salt if you car fast and keeps up with car on track power is nothing.

[AndySAXO]

Hmm Rickyrpm uses chipwazard which gives werid reading, I mean Willsy car made 163 and then a saw a car for sale on here with same sort of spec making 177 RR at chipwizard.

So that these cammed cars from chipwizard with 155-160 bhp figures, I think are more the normal 140-150 max bhp like most cammed vts.

[moxy89]

I would have thought a large majority of tuning companies will make there machines give higher reading, as people crave power, if they get a massive increase there going to go back. They take it on another rolling road and bang. 15-20bhp less and that a more accurate figure

[AndySAXO]

Well TDF and NMS gave me basically the same figures at racing also gave same reading as NMS when a mate went there after going NMS, all them gave same sort figures.

Same as these mobile dyno at shows they give out high figures so it get around and they get more people paying on the day!!

[jeppy24]

I got a saxo vtr 2000 and it ran 109.4hp @5800 and 112lb/ft torque@5000, but its probably the just a dodgy rr. The best one i've been too is torque of the devil in uxbridge.

[jeppy24]

you've got to watch out for happy dynos!

[tommy_g666]

I had mine rolling roaded at srmc in leicester.
http://i991.photobucket.com/albums/af34/tommyg666/my%20saxo/rollingroad0001.jpg
I have the later vtr engine in and made 100.3bhp (fly) and 132 torque. At the time i had a bmc open without cold air feed, 1.4 furio gearbox (came with car), saxsport 2" race system and miltek 4-2-1. I was well happy about the torque figure but i was hoping for alittle more bhp. My gearbox is shit and has cheap crap oil in. I have now fitted a cold air feed to the n/s morette straight to the bmc. I'm also going to be fitting my cb90 rallye gearbox and good quality correct grade oil in soon and going to get it rolling roaded again to see the difference. :y:

[Ellisg93]

I'd love to get my 1.1 on a RR ;)
Jokes. It's gunna be a VTS soon :)

[AndySAXO]

yer remember that torque is in NM not lb ft ok it about 97 lb ft torque. so that about on book figures so would say you should be happy take into account that it not a new engine, would be happy with that.

[sexy_gt]

**update**

placed order on at power bodies and filter, 3.5reg, 708 cams and placed a deposit on a predator for the end of the month.

[jonathon5]

**update**

placed order on at power bodes and filter, 3.5reg, 708 cams and placed a deposit on a predator for the end of the month.

I can see your determined to get 143 like me LOL

[sexy_gt]

anything above yeah id be happy

[adzvtr]

mine made 147bhp and 125ftib torque on 708s with andys map on the predator.
and mine was quicker than one on same spec cam making 155bhp at chipwizards on standard ecu.
the proof is in how the car drives m8. if ur happy dont worry bout the figures

[sexy_gt]

i just want to hear these bodies sing :)

[Chris-VTS-]

cmon all you 150 brake standard vts lads on here. get your arses over to grimsby and get rolled...

I'm from Grimsby, yet I didn't know we had a set of rollers here lol

[sexy_gt]

we had one at RASP.
they are currently re-locating to a new premesis, so no rollers running at the minute.

[Tyanu888]

Hi all, very interesting posts! I had my 16v dyno'ed! It was very loud that's for sure!
TB's sang lots! The guy of the RR said his rollers gives bhp at the wheel and torque in FtLb. After two hours of mapping (the omex ecu which we found to be very user friendly), results were: 159bhp at the wheel and 135 ftlb torque. It is important to have the bhp tested on a gear that is 1:1 in my case it was 4th gear (before i had the quaife box fitted). I guess its about 190bhp at the flywheel!

[AndySAXO]

Hmm what spec is the engine?

[AndySAXO]

On Saxo 4th gear is the closest to 1:1 not a 100 % match though.

[Tyanu888]

Spec:
PT52's Kent cams, high comp pistons (Wossner), carillo con rods, stage 3 cylinder head Gas flowed/ported, Omex ecu stand alone, Webber injectors, jenvey 45' TB's, 4-2-1 exhaust straight through 2 inch with powerflo back box and i use high octane racing fuel (VP) 109RON. I use the car for hill climbing only!

[Tyanu888]

On Saxo 4th gear is the closest to 1:1 not a 100 % match though.

Yepp true but its the closest!:A:

[Tyanu888]

http://img837.imageshack.us/img837/8088/mtahleb2.jpg (http://img837.imageshack.us/i/mtahleb2.jpg/) Uploaded with ImageShack.us (http://imageshack.us)

[AndySAXO]

O sound good but 190 ish bhp on Kent pt52 camshafts seem a high, if I ent mistaken they are close to the spec of 708/ph3 camshafts and them with high comp throttle bodies will be around the 160 mark at the fly not at the wheels

That sort of power more ph4 cams unless I got my Kent cams wrong, but would say that dyno was cala the figures back at the flywheel with a figure like 160 ish.

[Tyanu888]

surely not! I was assured it was very accurate and at the wheel not the FWheel. The chap had his rr imported from Australia and he definitely knows what to do, he actually went to Australia to learn, he is the best one in Malta. My cams have a duration of 278 deg. I think a lot of gain came from the high compression besides the good mapping. Well it works amazing, its great fun! I only use it in hill climbs though, it would cause a lot of trouble in the road ;)

[Tyanu888]

just a sec, 159bhp at the wheel not 190ish! just to be sure! The curve in fact is fantastic! Oh by the way it revs to 8300rpm!

[AndySAXO]

Hmm yer think I got mistaken the or 52 are close to ph4 cams, and hope your on solid lifters then with that rev limit, hyrdo followers will break down at that sort of rpm.

And you did say it was 159 bhp at the wheels which is 190 ish at the flywheel, I was just going of what you said.

[Tyanu888]

Hmm yer think I got mistaken the or 52 are close to ph4 cams, and hope your on solid lifters then with that rev limit, hyrdo followers will break down at that sort of rpm.

And you did say it was 159 bhp at the wheels which is 190 ish at the flywheel, I was just going of what you said.

lol wasnt sure, imagine 190 at the wheels.....mmm! lol!
Yes i have solid cam followers! Done a whole season last year and worked fine! It was testing year, now this year is winning year! ;)

back to Sexy_GT's query, i think you lost bhp because of the high mileage, probably new rings will give you a much better result. What do you think Andy?

[AndySAXO]

Yer I was not sure thought pt52 where different camshafts, and yer going to say soild lifter would be needed fit that sort of rpm, and I am unsure I think yer was just wear on an old engine losing some power,

Yer re ringing pistons could help but might not be worth on just a track toy, unless it totally goes I guess it depends on money and what you want,

I got high comp pistons on my engine because I knew my old engine wasn't too great was starting to go.

[adzvtr]

doing a compression test should show any signs of rings starting to fail

[sexy_gt]

lol wasnt sure, imagine 190 at the wheels.....mmm! lol!
Yes i have solid cam followers! Done a whole season last year and worked fine! It was testing year, now this year is winning year! ;)

back to Sexy_GT's query, i think you lost bhp because of the high mileage, probably new rings will give you a much better result. What do you think Andy?

i dont think the dyno result was correct. this is with the same engine 4 trackdays later. pulls strong!
http://www.youtube.com/watch?v=6zIBKPAJ7-A

[Tyanu888]

The difference is minimal once rings are changed but i would really try another dyno! Nice video! Cars sounds very good and powerful! You have a high ratio gbox i hear, right? Good driving! Congrats!

[Tyanu888]

http://www.youtube.com/watch?v=xPEeuyi2RXA
This is my onboard in a local hill climb last Nov! Very low ratiod! 159bhp at the wheel!

[sexy_gt]

http://www.youtube.com/watch?v=xPEeuyi2RXA
This is my onboard in a local hill climb last Nov! Very low ratiod! 159bhp at the wheel!

seen it already, my box is a vts with a quaife. i have been thinking of a quaife short gear kit but unsure at the moment.

[Sax-Lee]

My 53 plate vts with 60,000k and a piper backbox and induction kit got me 125.9bhp.
Quite a strong engine :)

[AndySAXO]

yer mate a quiafe gear set very nice good way to spend alot of money at once :P

[sexy_gt]

tell me about it. very expensive.

[jonathon5]

My 53 plate vts with 60,000k and a piper backbox and induction kit got me 125.9bhp.
Quite a strong engine :)

At the wheels ?

[AndySAXO]

Think that the flywheel figures

[sexy_gt]

car is booked in at Aw tracksport friday 18th. debating weather to get the car rolled or not. dont want to be getting hung up on figures...

[KamRacing]

Personally I dont like rolling road figures as the only means of determining power. Is your car comparably as fast as others with similar mods? If so dont worry about it...

[sexy_gt]

today at cadwell im hitting 112 where as before i was only just 105 mph (park straight). could be more if it wasnt damp.

[ClumpyVtR]

Mk1 vtr with 96k 421 mani with full system decat and enclosed filter with rally s1 box. 109bhp and flywheel is that good?

[sexy_gt]

Just has the car on a dyno.

708 cams
at bodies
330 injectors
saxsport
milltek manifold

105hp atw =131 fly.

This was maped with a predator by andy .h using standard timing. Cams need dialing.in and remapping.

[luthor1]

105hp atw....

(105+10)/0.9 = 128bhp fly

I don't think so. We've all seen the vid's, that's not 128bhp.
Take it somewhere else mate
Andy

[sexy_gt]

after i had my run a mate was there waiting to put his c2 vts on the rollers.

C2 spec (stock hatch car)
4branch manifold (so its decatted too)
aftermarket exhaust system
cams,inlet,air filter areall standard.

his car made 98whp at 6,500 mine was 105@ 6,500 and droped to 102@7,000.

after a conversation with gmc, john thinks the C2 is reading very low too as the decat manifold alone can give 17hp. this is turning out to be a serious LOL.

after som advice on the phone about how to set up the dyno (matching engine revs to dyno speed) i asked the operator how it was set up... i asked "what rpm did you use to match the roller speed" his reply was "i know what you mean but we dont do it that way". i replied a 11hp gain over standard from cams, itb,s remap and new 330cc injectors!???

pictures to follow....

[sexy_gt]

this is how its straped down, handbrake on and x2 straps to stop it going side to side. nothing to stop it going forward other than handbrake.

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/DSC04591.jpg

i did get offered a cuppa tea tho :) and yes i look like a tool in that hat but it was freezing!

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/DSC04593.jpg

taken during the run

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/DSC04595.jpg

old school technology

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/DSC04599.jpg

with the 105whp figure given some of you may say wheres your printout? there isnt one, well theres this...

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/DSC04600.jpg

followed by the equasion

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/DSC04601.jpg

also want sure if i had wheelspin, if the rollers were innacurate or if they wasnt set up right but the C2 that went on after me had shit covered tyres. mine were the same from driving through the yard to get there.

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/DSC04598.jpg

i have to admit with the wheels rolling some sort of fluid was sprayed on them to clean them up before the run.

[luthor1]

so at 6500rpm, the car was making 86lbsft of torque?

Hehehe!!!

[atspeedracing]

wow the old sun ram12 road-a-matic, the old man had one of those in the 80s!!

http://www.atspeedracing.co.uk/images/rolling-road-essex/rolling-road-essex-main.gif
do you think i need to update my facilities? :P

- colin

[VTHall]

how much does it cost to be done nowadays?

[jonathon5]

how much does it cost to be done nowadays?

If you use an old school rolling road like the one in the shed, probably £6.50 in old money.

[tillygti6]

wtf, does the rollers in the shed double as an mot brake tester too? thats gotta be older than me that setup...... id be very dubious about its accuracy myself...
wheras the atspeed road looks like you could eat your dinner off it!

[AndySAXO]

O my really not right, yer I would maybe go some else for a dyno reading.

No way is it 131 but did Andy move the cam timing? Or just leave it at standard timing?

[luthor1]

Cam timing is on the stock marks. The 330cc injectors are running over 65% duty, the car flies, the dyno is wrong.

Andy

[sexy_gt]

Cam timing is on the stock marks. The 330cc injectors are running over 65% duty, the car flies, the dyno is wrong.

Andy

lol almost sig worthy :)