Anyone using ap22?

[rwoodward]

yeah im off to see an RS4 on friday - sold my S4 last week and im missing it already!

[RobK]

That's what I said above Rob (but a tad more accurate [img]images/graemlins/tongue.gif[/img]) - you bin on the Stella tonight? [img]images/graemlins/beerchug.gif[/img]

Well yes I have actually, but you said 6.9 not 0.69!

Oh and I'll be happy to do some road test figures in a fortnight or so [img]images/graemlins/laugh.gif[/img]

[Andiroo]

Good point, should be on Stella rather than Vladivar [img]images/graemlins/tongue.gif[/img] The decimal point can destroy the strongest man [img]images/graemlins/roflmao.gif[/img]

Rob, your help on this will be much appreciated [img]images/graemlins/thumbs.gif[/img]

Andiroo

[smurfbus]

So in my baby it took 10.75 seconds from 30mph to 100mph. the other runs I had to ease off because of traffic.

[Andiroo]

Cool, I will post mine up later [img]images/graemlins/wink.gif[/img] So what does that 'Y' axis show? And please confirm all of your config so that we can show like for like [img]images/graemlins/thumbs.gif[/img]

Andiroo

[smurfbus]

edit: sample interval was 0.05 and the runs were accel. continious.
Y is g-smoothed. X mph
I found better busstop but now I cant see the comeing traffic so only 1/3 of the run are good. I'll try early sat. sun. mornings to get full 0-200kmph.
wether was good 7 C
other setup is:
mass 3701 lb MY 98 S4 sedan full run with full tank other two with nearly empty tank.
cda 0,69
roll res: 19 235/35 pirelli nero 0.015 estimate
tilt factor 0.010
roll factor 0,014
smoothing 0.004

top HP showed 303-307whp @ 91mph witch sounds alot for stg 2+.

[samtheman]

with your tilt factor and roll factor, is your suspension standard? [img]images/graemlins/rocker.gif[/img]

[Andiroo]

Just done a few runs and this was the only one with no traffic.

4th gear only, 30mph=1600rpm in 4th with boost coming in at around 3200rpm.



Indicates 418hp peak at the wheels, which when adding a factor of 42% = 593bhp at the flywheel. Rolling road next week will confirm how accurate this is , but doesn't seem too far off.

Andiroo

[smurfbus]

with your tilt factor and roll factor, is your suspension standard? [img]images/graemlins/rocker.gif[/img]

I have KONI orange with some lowering. family car with hard winter conditions so not too low or hard.

I thing tilt does not affect these kind of easy starts unless you have crasy power and soft suspension.

I measured the runs with continious accel so I could do more accurate graph.

[DJG]

Just tried one run in 4th.

15.9s [img]images/graemlins/blush.gif[/img]

Standard S4

David

[smurfbus]

Indicates 418hp peak at the wheels, which when adding a factor of 42% = 593bhp at the flywheel. Rolling road next week will confirm how accurate this is [img]images/graemlins/wink.gif[/img], but doesn't seem too far off.

Andiroo

Where did you find out about the correction factor for ap22?

42% would give too much power in my case. IMO 433hp with k03 is not going to happen. normal dyno whp is something like 17-22 % correction and usually calculated as xwhp/0,78 if 22% loss used. that should give me 307/0,78 = 393 witch is too much too. 17% makes 370 witch I believe with 7 C is absolute max possible ever for k03's. then again these are not absolute numbers but useful when comparing different setups

[Andiroo]

The rule of thumb for flywheel bhp down to ATW Bhp is to take off 28% losses thru the quattro drivetrain. To convert "At the wheels" bhp back to flywheel bhp you therefore add 42%. Check out Bushy's ATW figure of 320bhp at G-Force Rolling Road and you'll see what I mean [img]images/graemlins/wink.gif[/img]

Andiroo

[RobK]

Does it matter that my 4th gear is different to yours? Also, are you setting off from a standstill and changing into 4th before 30? If so, what speed are you changing so the turbos have spooled up in time?

[Andiroo]

Hey mate [img]images/graemlins/wink.gif[/img] I basically bumbled along in 4th around 25mph then floored it waiting to reach my magic 3000rpm - so the turbos weren't spooled at all really. Just trying to get a good speed range in one gear so that we can compare, without adding unknowns like launches and changing gear. Do you think this is a good range/gear to use to compare say S3/S4/RS2/RS4?

Andiroo

[Riz_RS4]

Audi S3`s turbo kicks in at around 1000rpms quicker than yours [img]images/graemlins/tung2.gif[/img]

Riz [img]images/graemlins/s3addict.gif[/img]