barry123's VTS - Lightweight flywheel & quaife 21/04/12 #1035 - Page 27 - Saxperience

Barry123 · 26th April 2009, 23:21

Right minor minor update really, not even worthy of mentioning but fark it.

I fitted my comps back at christmas but was too lazy to mount the crossovers permanently... anyway after several issues with the speakers suddenly dying because the wires were frayed I decided to get that job over with... fitted yay

At the same time I replaced a couple of door popper things because I'd shafted most of them and the front of the door card was loose

now tightly fitted.

Adjusted the brake pedal travel too... Now this has been top of my list since I bought the car but again, failed the 'could be arsed' test, today I passed... first attempt was well and truly over done and it left the brakes in a situation where they were permanently on, felt bloody good at stopping (obviously), not so good on my precious mpg

anyway... now I sorted the 'overcorrection' these 266's are really showing there credentials off.... love love love them

266's ROCK!

jamiemackie · 26th April 2009, 23:40

car looked good on saturday man, also cheers for explaining the afr thingy to me lol

James · 26th April 2009, 23:42

Looking good Adam, it's been a while. Hope all is well

Ferg · 26th April 2009, 23:51

Quote:

Originally Posted by adsayer

ooo errr i was expecting the max attained rpm figure to be a lot lower... Now this is what happened with mine the first time round... they didn't calibrate the rpm correctly the first time round on mine either... smacked the limiter at an apparent 7450rpm on mine at 111mph (when we know the limit kicks in at 7250rpm)... so my first run is garbage to be honest - what this means is the hp figures are higher than they actually are

This time round, it hit the limiter at an apparent 7300 (so only 50rpm out) so the figure is a lot more closer to the actually figure been outputted to the engine. What this means is my gains are more than it appears which is cool.

Does your de-cat have a faux box where the cat would normally be? the cat box itself also aided Engine Exhaust pulse tuning, without it your torque profile gets altered (usually for the worse) which was why I was thinking it was a bit low considering the other mods you had done.

ads

Mine always seems to have quite low figures on Rolling Roads ... It's strange. Well spotted about the whole max RPM thing. How on earth it's able to reach that when the hard limiter is set @ 7250 is beyond me. Makes me think all this Rolling Road business is bollocks.

I'll just have to get my car on their rollers again once it's cammed and see what the difference is. It goes ok on the road so can't complain.

R.E De-Cat ~ Haven't got a faux box ... The de-cat is just a straight flow pipe from the manifold to the Magnex centre section. Agreed I think this is why the torque figure is lower, but mehhh.

FinchysSaxo · 27th April 2009, 00:09

good stuff ads, i would have been screwing if they id taken mine and they only did 1 run on it, wouldnt pay.

Goin BHP?

charlie53 · 27th April 2009, 07:21

Quote:

Originally Posted by adsayer

At the same time I replaced a couple of door popper things because I'd shafted most of them and the front of the door card was loose

now tightly fitted.

Where did you get those? My passenger door card is exactly the same.

Toad · 27th April 2009, 08:34

Yes, RRs are good for camparisons of your own engine alterations, and also tuning. One off visits can leave you more puzzled than you started off with!

Good increase in max BHP Ads. How did other things change, such as the torque in general, and BHP through the RPM range?

Barry123 · 27th April 2009, 10:41

Quote:

Originally Posted by jamiemackie

car looked good on saturday man, also cheers for explaining the afr thingy to me lol

thanks dude. Yeah sorry about that... all a bit of a blur as I was crapping myself that my engine was going to blow

was I bangin on about 'omg it's at 18!!' ?!!? hahah

Quote:

Originally Posted by James

Looking good Adam, it's been a while. Hope all is well

Now mate! Yeah things are going well cheers mate. Hope everything is cooooooool.

Quote:

Originally Posted by Ferg

Mine always seems to have quite low figures on Rolling Roads ... It's strange. Well spotted about the whole max RPM thing. How on earth it's able to reach that when the hard limiter is set @ 7250 is beyond me. Makes me think all this Rolling Road business is bollocks.

I'll just have to get my car on their rollers again once it's cammed and see what the difference is. It goes ok on the road so can't complain.

R.E De-Cat ~ Haven't got a faux box ... The de-cat is just a straight flow pipe from the manifold to the Magnex centre section. Agreed I think this is why the torque figure is lower, but mehhh.

could be just that then... but yeah the figures are bollocks if the company doesn't set the rpm right

Quote:

Originally Posted by FinchysSaxo

good stuff ads, i would have been screwing if they id taken mine and they only did 1 run on it, wouldnt pay.

Goin BHP?

It's quite far out for me dude (not normally one to be put off by mileage), and I think I'm busy that weekend anywayz

Quote:

Originally Posted by charlie53

Where did you get those? My passenger door card is exactly the same.

Citroen, 22p each

Quote:

Originally Posted by Toad

Yes, RRs are good for camparisons of your own engine alterations, and also tuning. One off visits can leave you more puzzled than you started off with!

Good increase in max BHP Ads. How did other things change, such as the torque in general, and BHP through the RPM range?

I've just had a quick check and... here's what I can see...

Area under torque profile has increased (good for overall drivability/OTR performance).
Significantly less torque below 3000rpm (almost 12ftlb less at 2000rpm! but less of a difference as you climb the revs)
More torque above 3000rpm to limiter - most gains between 3500-5000 (extra 7lbft roughly in that area).
6lbft increase in peak torque to 114.6lbft.
wheel power 5hp increase at peak... overall more area under the wheel power profile.
Wheel drag power has reduced by 4 hp at peak... and only reduced between 6600 and limiter, the rest of it is almost bang on the same... my guess is that on the first outing my front wheels weren't balanced which would have increased loading and unloading forces on the rollers per revolution of the wheel (worse effects the faster they're spinning), as a result increasing the wheel drag up top, this is good also from the fact that the bigger brakes aren't having a significant effect on the wheel inertia either.
Overall though... improvements right where I want them

so I'm happy. haha

Toad · 27th April 2009, 11:02

Yeah man, very good results!

olly_vts · 27th April 2009, 11:04

Very good figures on the RR dude. I would be very chuffed with anything like that. I need to get mine done once i've put my de-cat back on.

Barry123 · 27th April 2009, 11:05

I wouldn't bother with a decat mate!

olly_vts · 27th April 2009, 11:36

Quote:

Originally Posted by adsayer

I wouldn't bother with a decat mate!

How come? Because of the noise? I liked it tbh. Had to take it off for the MOT though.

Barry123 · 27th April 2009, 11:43

because I've yet to see any benefits in terms of power output dude! They sound pretty wicked though!

olly_vts · 27th April 2009, 12:37

Quote:

Originally Posted by adsayer

because I've yet to see any benefits in terms of power output dude! They sound pretty wicked though!

fair play. I thought they were meant to give a good gain - obviously not lol

Jorge- · 27th April 2009, 12:43

Be interesting to put mine on same rollers, similar setup, but with a straight pipe from mani to backbox..

sparky5522 · 27th April 2009, 13:15

Easy Sayer, really like what you've done with her and glad your enjoying ripping it up everywhere you go! Must meet soon with Luke for a beer......

Toad · 27th April 2009, 13:17

Quote:

Originally Posted by adsayer

because I've yet to see any benefits in terms of power output dude! They sound pretty wicked though!

When you need things flowing more freely, like when moving to a higher spec cam, you will need the cat removed, that's for definite Ads.

Barry123 · 27th April 2009, 14:17

Quote:

Originally Posted by olly_vts

fair play. I thought they were meant to give a good gain - obviously not lol

as said above to Ferg, if the catalytic material is removed from the box (so you decat with a faux box instead of a straight pipe), then I can imagine some gains (although not as much as people suggest).

Quote:

Originally Posted by Jorge-

Be interesting to put mine on same rollers, similar setup, but with a straight pipe from mani to backbox..

get yourself down and we'll have a comparison... I'd be interested!

Quote:

Originally Posted by sparky5522

Easy Sayer, really like what you've done with her and glad your enjoying ripping it up everywhere you go! Must meet soon with Luke for a beer......

Sup man! Defo! Luke is back in Gtown from July, more than welcome to give me a call and pop by for a meet up!

Quote:

Originally Posted by Toad

When you need things flowing more freely, like when moving to a higher spec cam, you will need the cat removed, that's for definite Ads.

I'm not sure it is for definite man! I think removing the backboxes and leaving the Cat would be better than the traditional way.... I'd like to know where a lot of this information regarding tuning comes from... I'm sure most of it stems from a time when new technologies were introduced and were, at the time, more restrictive but I don't think it applies to the same extent these days... anyway onwards with the research!!!!

Jorge- · 27th April 2009, 14:18

In that thread i posted about backpressure... google said that its about velocity, not pressure.

Barry123 · 27th April 2009, 14:21

Quote:

Originally Posted by Jorge-

In that thread i posted about backpressure... google said that its about velocity, not pressure.

in the flow of gas, they're very heavily related mate... when the exhaust valve opens you have a high pressure point at the cylinder and the low pressure point at the atmosphere. the higher the difference between the pressure da fasta da flo.......