(brain fart) difference between crank hp and wheel hp?
#1
(brain fart) difference between crank hp and wheel hp?
OK so with all of these St3 numbers flying around (and yes some of these are on 100 octane) but S3 for Sean and Marcus are running 290whp so what's this at the crank?
ie TT power (standard) is 225 which is crank yes? so about 170-180whp? I so can't wait for S3 for the 225s to come out as there are rumours of 340sh whp which would be about 400hp (crank)
So with my "X" and Borla I am guessing I am running around 275hp (crank) which would be about 220sh whp
Hope I got that right.
ie TT power (standard) is 225 which is crank yes? so about 170-180whp? I so can't wait for S3 for the 225s to come out as there are rumours of 340sh whp which would be about 400hp (crank)
So with my "X" and Borla I am guessing I am running around 275hp (crank) which would be about 220sh whp
Hope I got that right.
#2
Let me try and clarify the Stage III numbers for ya.....
Neither Sean nor Marcus have hit the dyno yet so I don't think we've seen Stage III numbers for the TT yet. Stage III numbers for the VW 1.8T's are running anywhere from 260-270hp at the wheels and this is with a 2.5" or greater exhaust. Assuming the sort of standard 15% drivetrain loss that puts them in the 300 to 310hp at the crank range. No APR Stage III that I know of have put down more than 270hp to the wheels.
Since Sean has an FMIC, intake and exhaust mods as well and is FWD, I'm going to assume his WHP numbers would be similar - probably in the 270+ range. With Marcus having quattro - and using a 30% drive train loss - i'd expect probably 220hp or so at the wheels. Stage III+ is reported putting out an additional 40hp or so at the crank - so about about 340-350 at the crank for Stage III+ for the 180hp TT.
The 340hp number that has been thrown around by APR with regards to the Stage III for the 225TT is CRANK hp not wheel hp. Don't know what estimates for III+ are.
Now if we could just get Sean and/or Marcus on the dyno..........
Since Sean has an FMIC, intake and exhaust mods as well and is FWD, I'm going to assume his WHP numbers would be similar - probably in the 270+ range. With Marcus having quattro - and using a 30% drive train loss - i'd expect probably 220hp or so at the wheels. Stage III+ is reported putting out an additional 40hp or so at the crank - so about about 340-350 at the crank for Stage III+ for the 180hp TT.
The 340hp number that has been thrown around by APR with regards to the Stage III for the 225TT is CRANK hp not wheel hp. Don't know what estimates for III+ are.
Now if we could just get Sean and/or Marcus on the dyno..........
#3
Thanks Joe
so I guess having quattro is a downside in terms of loss of power to wheels. However, having quattro means better handling and getting that power down - kinda confusing. Loose on paper up to 50hp between crank and whp numbers but be able to put it down better.
Also interesting that the SIII for 225s is quoting the same numbers as the 180 (crank)
Also interesting that the SIII for 225s is quoting the same numbers as the 180 (crank)
#5
Question, if the quattro is only engaged with slippage and the car is FWD til then >
why would the degree of drivetrain loss be 30% if the rear wheel drive is not engaged most of the time?
#7
well then stop screwing things up, will ya? lol :P
180 Stage 3 = 290hp crank
180 Stage 3+ = 330hp crank
225 Stage 3 = 330-360hp crank
225 Stage 3+ = 350-390hp crank
The difference in the 225 kits will be whether APR or PES. I am pretty certain the PES kit will be out months before the APR kit. The PES kit is also going to be the higher hp kit.
180 Stage 3+ = 330hp crank
225 Stage 3 = 330-360hp crank
225 Stage 3+ = 350-390hp crank
The difference in the 225 kits will be whether APR or PES. I am pretty certain the PES kit will be out months before the APR kit. The PES kit is also going to be the higher hp kit.
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#9
Because Haldex actually is engaged most of the time .. .
the rear wheels are constantly "slipping", it only take 3" of tire travel slippage for the Haldex LSC to engage. This happens under normal circumstances.
The TTQ on a 4 wheel dyno will spin the rear drum.
The TTQ on a 4 wheel dyno will spin the rear drum.