Originally posted by PapVas
View Post
Announcement
Collapse
No announcement yet.
RS2 GT3071R dyno results
Collapse
X
-
Originally posted by AndyP View Post@Faheemo
Did you really run 460bhp on a std ABY intercooler?
the way my car was mapped, the intake air tempratures wher quite low.
Not sure if the intercooler was restricting the flow though.
S2 Coupe fully built.
10.9 1/4mile 0-100 in 3.5secs
Precision 6262 turbo
The Green Monster
Comment
-
Originally posted by PapVas View Postis the 25% include tyre losses as well?Since the dyno was done on a rototest hub dyno,then maybe the 25% is less?i dont know!
http://www.rri.se/index.php?DN=29
The (supposedly) 420hp B7 RS4 gets 330-340hp at the hubs.1995 RS2 on Alcohol (6.8sec 100-200km/h)
1994 80E Avant
1986 2L Golf 2 on Alcohol
Comment
-
Originally posted by Faheemo View PostDone in 3rd gear..
used equation: crank hp = (Gtech Hp +10 ) divided by 0.82
apparently this is the conversion used for calculating crank hp on 4wd cars using a gtech.
Is it correct ?
At what altitude did you perform the test? How about temperature, humidity and barometric pressure?
I have a Mr. Dyno performance tester that is very similar to the G-Tech, but it corrects to the SAE dyno correction standard (based on temp, altitude, etc).
In addition, it corrects for aerodynamic drag.
Due to low speed limits, I have done my tests in 2nd gear, getting approx 330hp to the wheels. Testing done at 5deg C. Raw, uncorrected (for athmospheric conditions)numbers are 355hp. I get 250hp in 1st gear, demonstrating how much power is lost to inertia (masses spin up faster the lower the gear), and the turbo not having enough time to spool. 3rd gear or 4th gear testing should yield higher numbers.
These kinds of performance testers are worth their weight in gold. I can get curves that overlay perfectly on back to back runs, so gains (or losses) from mods show up clearly.1995 RS2 on Alcohol (6.8sec 100-200km/h)
1994 80E Avant
1986 2L Golf 2 on Alcohol
Comment
-
Originally posted by EspenW View PostGood question. Remember that an S2 loses approx. 25hp to aero drag at that rpm in 3rd gear. In addition, losses to inertia are higher in 3rd gear than they would have been in 4th gear (or steady state as tested at the factory).
At what altitude did you perform the test? How about temperature, humidity and barometric pressure?
I have a Mr. Dyno performance tester that is very similar to the G-Tech, but it corrects to the SAE dyno correction standard (based on temp, altitude, etc).
In addition, it corrects for aerodynamic drag.
Due to low speed limits, I have done my tests in 2nd gear, getting approx 330hp to the wheels. Testing done at 5deg C. Raw, uncorrected (for athmospheric conditions)numbers are 355hp. I get 250hp in 1st gear, demonstrating how much power is lost to inertia (masses spin up faster the lower the gear), and the turbo not having enough time to spool. 3rd gear or 4th gear testing should yield higher numbers.
These kinds of performance testers are worth their weight in gold. I can get curves that overlay perfectly on back to back runs, so gains (or losses) from mods show up clearly.
tempratures would have been in the 15 to 20 degree range.
cant remember the exact date , but was testing at nite - when no traffic around.
Only other factor could be the weight inputed into the gtech, I used 200kg more as i added my weight (100kg) + another 10kg for things that add additional weight like audio sound + 18 inch rims + bigger brakes + inverter and a laptop i run in the car + plus all the other small mods that add kg's.
Adding another 25hp for drag to 460 makes the hp figure unbelievable.
S2 Coupe fully built.
10.9 1/4mile 0-100 in 3.5secs
Precision 6262 turbo
The Green Monster
Comment
-
Originally posted by Billman View PostAccording to roumours in Germany they never measured stock RS4 on the dyno with the stated 420 PS. Most of them have something arounf 400 PS.
However, it is interesting to note that the RS4's pull 335-345ps at the hubs, while the R8 pulls 375ps at the hubs. Both are rated at 420ps at the flywheel.
I have seen B7 RS4's pull as little as 285hp at the wheels on Mustang type rolling roads.1995 RS2 on Alcohol (6.8sec 100-200km/h)
1994 80E Avant
1986 2L Golf 2 on Alcohol
Comment
-
Originally posted by 4WheelDrifter View PostThat would be similar to the rumour that all stock RS2s are 300 bhp, not 315.
Porsche supposedly bench tested every single RS2 engine for an hour to ensure that they produced the claimed 232Kw/316ps/310bhp.
Think about it, it is exceedingly easy to get more than 315hp from a standard ADU engine. Why would Porsche/Audi lie about the real output of the engine.
So called flywheel numbers generated from a session on a RR is in no way proof that the engine will not produce the claimed power when tested on an engine dyno to strict DIN procedures and standards.Last edited by EspenW; 25 December 2007, 00:34.1995 RS2 on Alcohol (6.8sec 100-200km/h)
1994 80E Avant
1986 2L Golf 2 on Alcohol
Comment
-
some vids...
Here are some 4th,5th gear pulls i did.I also tried a partial 6th gear but was interuppted by the small traffic.
It shows the surging on 4th gear and a bit in 5th gear.In 6th i get no surge.
http://s117.photobucket.com/albums/o...arpullhalf.flv
http://s117.photobucket.com/albums/o...thgearpull.flv
http://s117.photobucket.com/albums/o...thgearpull.flv
Comment
-
Originally posted by PapVas View PostHere are some 4th,5th gear pulls i did.I also tried a partial 6th gear but was interuppted by the small traffic.
It shows the surging on 4th gear and a bit in 5th gear.In 6th i get no surge.
http://s117.photobucket.com/albums/o...arpullhalf.flv
http://s117.photobucket.com/albums/o...thgearpull.flv
http://s117.photobucket.com/albums/o...thgearpull.flv
Interesting. I like the way you've integrated the EGT gauge in the boost gauge pod.
Do you run a wideband lambda for AFR?1995 RS2 on Alcohol (6.8sec 100-200km/h)
1994 80E Avant
1986 2L Golf 2 on Alcohol
Comment
Comment