SCOSaltire

MY99 UK with PPP, SS DP and SS BB.

Got This dyno result

Power Data:
P-norm : 254.5 bhp
P-eng : 254.0 bhp
P-wheel : 163.5 bhp
P-drag : 90.5 bhp
Max. power at 109 mph or 6140 rpm

Torque : 246 lbf-ft
Max. torque at 83 mph or 4650 rpm

Air temp 16 deg C
Air pressure 1005 mbar

A bit low or about right with the mods?

Slow spool up?
Doesnt seem to start until about 3300 rpm

Whats the peak and then dip in the power, torque and boost @ 3500 rpm?

On the road the car seems to have a stuttery first time acceleration - but then after that it is v smooth.

Seems this run is similar to the first acceleration experienced on the road?

Pavlo

rolling road isn't the same as the road, too quick to get proper spool up.

did you specifically ask them not to take it over 6000rpm? because it looks like there was another 15hp or so if it was taken higher, even though the torque was dropping.

paul

TonyBurns

iTrader: (3)

Just imput this in, this is my MY00 PPP'd turbo (standard at the time) http://dyno.scoobynet.co.uk/WLuk/tony_burns.htm
Your power curve seems well off and you do have 8lbs of torque more than me but only a few bhp up
What fuel are you running your car on?

Tony

SCOSaltire

didnt give any instructions

i was running BP SUL + 2ml per litre of NF octane booster

tank was half-used... so had been BP SUL before that and then the above mixture for 140 miles before the run

Andy.F

Sorry we didn't get introduced yesterday (i think)
The readings yesterday cannot be compared with some other dyno days.
To try and maintain some consistancy we agreed a standard position for the air temp compensation probe. This was on top of the airbox in order to try and capture the actual air intake temperature.
On previous days the probe has been in various positions, some of which picked up excessive heat. This can lead to an excessive compensation factor being applied to power and torque figures.

The standard probe position should now help with comparison between cars and when comparing power output of runs on warm and cold days.

Andy

LG John

What boost are you running phil?

Andy.F

1 bar peak tailing to 0.85bar (from the graph) Bit low perhaps ?

LG John

I know I said I wouldn't but I think I'll get my car on the RR just to be sure all ponnies are present and accounted for

john banks

IMHO, nothing wrong with it Phill. The boost is low because of JECS 2 port solenoid boost control in the artificial setting of a rolling road. No doubt it will run considerably more boost and therefore torque on the road. Measurement artifact. Midrange maximum duty cycle is not adequate for it to achieve target boost on the rollers (if it was it would overboost on the road). The maximum duty cycle in the ECU controls the amount of overboost you get. At the top it is less frisky so the duty cycle is not so constrictive. Your top end boost is correct for a PPP and that is what gives you the decent power figure.

[Edited by john banks - 10/13/2002 1:59:12 PM]

LG John

John what would you expect my car to make at star John? I'm not massively convinced by RR, the results seem so variable.

chrisp

Mine ran 0.2 bar less on the RR (1.0bar)than it does on the road in 4th (1.2bar), so I am guessing but it would be a bit more powerful on the road.

john banks

Theo's got 272 BHP in similar format but the boost was quite high.... a certain gentleman who helped fit the intercooler gave the Dawes an extra twist outside without me knowing and it hit fuel cut the first time on the rollers, then turned it back a bit. Even with a Dawes, it might run a little less on the rollers than the road, but it should not give quite the funny shaped boost curves.

Part of it might be that the first time you boost your car after it is warm it doesn't quite reach target boost - turbo is not very hot. However, on the rollers you have to offset this against heatsoak.

TonyBurns

iTrader: (3)

John,
the car in question though even though the top end power is good isnt giving good low down torque, my PPP'd car was pushing 160lbs of torque where that one was giving around 110lbs, the torque curve is way off as it just seems to jump steeply half way rather than give a smooth curve and the BHP delivery looks jumpy (could be down to the rollers?) but he has complained of stuttering low down which would i assume be associated with the fact that there is lack of low down torque.
I would expect the power delivery to be much better than that IMHO.

Tony

SCOSaltire

cheers all

andy
aye - shame we never got introduced.
Im sure u know the car and who am i now - so next time

SB
as andy said... 1 bar peak

JB
Thanks - I was sure ud know what was going on.
I was picturing the curves when i was booting it on the way home. Noting when i felt the car pulling hard - and this was about 2700 rpm once i tried it a few times. I usually change up at about 5500 rpm. I went further to see what happened and it felt like the curve... pull decreasing from 5500. So it all fits

chrisp
Cheers for sharing that.
I think ill be getting a boost guage.
Dunno what i run on the road just now.
Used to be 16.4 psi ish with std DP



Should I do an ecu reset?
Ive not done one since I got the DP fitted...

BTW, im not concerned over the figures now - thanks all!

john banks

It looks like they all do on these rollers Tony. My car was hitting 19 PSI at 2400 RPM when I had it on the road and low down torque was incredible. On the rollers it just hit 17 PSI at 3500 RPM adn the torque curve was completely different to how you could feel it was behaving on the road. It is an artifact of the measurement technique pure and simple.

SCOSaltire

was that 19 psi with the dawes john?

john banks

In various setups I had 19 PSI, but only in the winter, and I wouldn't recommend it. The little turbo has too much charge temperature and back pressure to make it that sensible. I would stop at 18 PSI with a TD04L now. This could be achieved with a Dawes with your PPP though - recommend a knocklink if you do this. The performance will make you eyes pop out in comparison to a decat PPP

LG John

Hmmm, it's still not meaty enough for me Sometime my car feels fast as **** and other times it almost feels like the Saxo could have kept up on a good day!! I feel like I need something that will give a big meaty shove in the midrange and top end.....big turbo needed huh??

john banks

Yes, you are getting used to it. Like drugs.

[Edited by john banks - 10/13/2002 8:28:43 PM]

LG John

I should be fine....I've got to drive the 1.0l polo for a few days while the scooby gets some work done Can't wait till I get back in it

TonyBurns

iTrader: (3)

Saxoboy,
standard uk scoob to standard vts the scoob is quicker
what makes the feeling different is the cars size, a smaller car will always feel quicker than a larger car even though a larger car is actually 7-8 secs quicker to 100 from a standing start
(evo quotes 22.6 for a vts to 14.6 for a uk turbo )
Ive had people in my car and ive said ive hit 120mph, they were dumbfounded at how quick the car got there but its designed for that sort of speed and thats what counts
When John played around with his car he no doubt thought it was slightly quicker but when looking down saw that it had exceeded his expectations of the sort of power he had gained

Tony

LG John

I know, I know, but sometime the scooby can feel pretty slow. Remember though that the scooby will only get 14.6 with a mental launch and I'm not convinced that the majority of standard cars could do 14.6 anyway. Based on my Crail results and races with 172's etc I think the MKII VTS (believed to have 130bhp) could do it in 20 secs dead. The difference between a standard MY99 and the saxo down the 1/4 wasn't very big...which is why I modded my scoob