my dyno and shit power result story

[sexy_gt]

here she is a year ago at rasp garage in grimsby, lincolnshire (now gone under)

mods at this point was

saxsport
miltek manifold
simota induction

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

power was poor and peaked early 114bhp fly and low 98torques
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/roller008.jpg

after the car being so quick on track i was at least pleased that there was a lot more to come.

updated the spec to

saxsport
miltek manifold
cat 708 (timed to standard marks)
at power bodies
330cc injectors
predator ecu

with rasp garage being closed i went to dennis vessey in barnetby, lincolnshire

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

power again was piss poor and decided the rollers was shit, thinking the car goes soo well on track!

105atw 130bhp fly
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/DSC04600.jpg

continued to do more trackdays with the car at this power level.

then i bought a 2003 vts, sportcat and ind kit, drag raced both my saxos together 50-110mph. not a nats fart in it! i was right the black car wasnt performing!

after this i took to AW tracksport, horncastle, lincolnshire. took to these guys because ive seen them and their cars at my local tracks and looked to be doing well.

rolled at AW tracksport as it was and gave 105atw 130fly (no graph sorry)

after 3 weeks waiting for the cam timing to be set up i went to collect the car, feels better, not night and day but better.

the car made 124atw and 150fly (sorry no graph)

the following saturday 26/08/11 went to corten miller, lincolnshire with both my saxos ;)

the 2003 one kicked out a gob smacking 136.6
http://img.photobucket.com/albums/v212/sexy_gt/WKR/2011-08-27135646.jpg

http://img.photobucket.com/albums/v212/sexy_gt/WKR/2011-08-06181235800x600.jpg

no wonder it kept with the black car!

now as the silver vts was the first car on the rollers i was thinking im going to get 160 at least, possibly 170 after that figure!

http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/2011-08-27082851800x600.jpg

shock horror, fuel spot on and power down, looks like there is a restriction in there somewhere power flat spot from 6,500 to limiter!

power and fuel graph
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/2011-08-27135735.jpg

power and torque graph
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/2011-08-27135743.jpg

corten miller think head needs porting but im not convinced!

i think weak valves, lifters worn valve seats coked up to shit?

doing a comp test today ;)

[tomsaxo]

I'd swap engines!

[AndySAXO]

I would say it not that far off, that power cuvre good, but doing more to get say an extra 5 to 10 bhp would be judt chasing figures.

To let you know I have no head work, with ph3 atpower bodies, only different I have high comp bottom end, I have had it at three dyno now, NMS, TDF and atspeed, and it had 134 atw at NMS, 140 atw at TDF and 136 atw at atspeed.

I wouldn't worry about the extra bhp as I know you plan to change your spec soon anyway?

Also mine werid as my engine does peak at 7.3k mark.

So I really have no gain over yours at your peak rpm.

My torque doesn't peak til about 6.5k too.

But my head getting work on with new cams in the winter anyway.

But again I wouldn't worry about it

[wadoryu]

i'd swap engines

[moxy89]

you say that you kept up with the silver one??

but doesnt the weight of yours and the gearbox have a large play in this, as i take it the silver one is full interior and what not.

what is the miles on the black one? i ran 126.6 bhp on a 76k vts with just a manifold..

[Gabbastard]

Theres no way a cammed stripped VTS should be getting horsed by a standard 03 one.

When we did an SSC rolling road day a couple of years back, my totally standard -save for a panel filter - VTS engine got 104@fly. Seems a bit weird you getting those results with so many mods.

[sexy_gt]

is making 124 atw now cams have been set up gab.

silver car 75k

black car 110k

between now and xmas i am saving for either headwork, top end overhaul and c/r box or going right in there for s/c

it just sucks to have a car that handles, corners and brakes but has F/all when you want to accelerate out a corner.

[moxy89]

i would go new engine before S/C mate.. a vts engine £200 for a decent one, get that rebuilt and your laughing

[sexy_gt]

UPDATE! (pictures will be included later this evening)

compression test done
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/2011-09-03094906800x600.jpg

here is what i did

before i warmed up the car i removed coil cover, coil pack and slackened off the spark plugs a tiny bit.

refitted the coil pack.

started the car and allowed it to build temperature.
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/2011-09-03101320800x600.jpg

turned the car off, removed coilpack and all 4 plugs, taking note all 4 plugs are same colour, not burnt, oily or coked up.
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/2011-09-03095630800x600.jpg

inserted the gunson comp tester, niped it up finger tight.

held throttle fully open and cranked engine over 6-8 times taking a reading from each cylindar, resetting the gauge every time ;)

starting from piston nearest the ecu i have

15, 15, 14.9 14.6 bar!

appears to me that there is good compression. i can only assume that the two of the lower figures are down to valve seats being dirty.

according to the gauge anything between 10-14 bar is good (green area) over this is in the red!
http://img.photobucket.com/albums/v212/sexy_gt/saxo%20vts/2011-09-03102435800x600.jpg

i did not do a wet (add a tiny drop of oil) test due to not wanting to damage anything due to excessive compression.

had the lower two results been a bar or more less then i be worried.

i think its possible that the valves may need a grinding/cleaning session.

comments all welcome!

[sexy_gt]

i would go new engine before S/C mate.. a vts engine £200 for a decent one, get that rebuilt and your laughing

i have one sat here ready ;)

[yr51ocw]

like you metion, the graph fails to climb after 6500, which would indicate an air flow restriction, valve seats would really cause this. But worth lapping the valves in for peace of mind.

What is the condition of the exhaust? One cheap thing I would try is to swap exhaust systems from the silver one to the black one and watch the adaptions in fuelling on the ecu (if it has this function) to see if the airflow in the upper speed range has increased.

[sexy_gt]

silver car has sport cat system.

also trying to figure out right now how to wire in this wideband lc1

[Daniel09]

if its not a problem, start a fresh with the silver saxo? changine everything over your cams, all your suspension, litrally everything and go from there?

[sexy_gt]

if its not a problem, start a fresh with the silver saxo? changine everything over your cams, all your suspension, litrally everything and go from there?

no offence but for the sake of an engine bollocks to that idea! :y:

[Daniel09]

fair enough :y:

[raunchz]

Could be head off time, clean it all out and light bit of headwork - then see how it feels?

If still like it then maybe change the manifold? Id be surprised if the saxsport is causing it

[sexy_gt]

Could be head off time, clean it all out and light bit of headwork - then see how it feels?

If still like it then maybe change the manifold? Id be surprised if the saxsport is causing it

going to leave head on for now, may have a stage 3 highflow head lined up yet.

i doubt mani or exhaust is at fault.

id whip head off and regrind/clean stuff but its the timing cams up, yes i can mark them but they wont be 100% where i paid an arse clenching amount to have them set up to.

[AndySAXO]

Yer it more the fact they are all balance on the compression test that bit more inportant that the pressure.

But does have good compression there.

Mine would be in the red though :oops: as I have 240 psi in each cly.

A bit of head work might get you 10 mire bhp.

But maybe worth saving for s/c

[yr51ocw]

why dont you get a couple of DTI gauges and check the cam timing yourself?

[sexy_gt]

why dont you get a couple of DTI gauges and check the cam timing yourself?

may be worth the investment.

have had 2 thigs to add to this,

1st the plug gaps was all 0.8 when they should be 0.9, so i reset them them to 0.9.

2nd the comp test, the lowest reading was taken from the last pot, could it be that it had 5 mins to cool down and lost a tiny bit of comp?

[Darkslider]

Could well be, one way to find out though, re do the test starting from the other end and see if you get similar readings but backwards! Hope you manage to get this sorted mate, way over my head most of it but I'll be watching with interest!