My Saph Dyno results....
23-07-2011, 07:32 PM
#58
10K+ Poster!!
iTrader: (4)
i have a comparison here from a hub dynoed and dd dynoed cars.
skyline made 500 whp on dd rollers shows 350 whp in 4th gear on gtech
supra was dynoed on rototest hub dyno like a dynpack, made 757 whp, gtech shows 550 whp for 4th gear.
so the results show that dd rollers showed 150 hp above my gtech, the hub dyno shows 200 hp more than the gtech, so roughly speaking in theory if my supra made 757 on hub dyno it would make about 707 whp on a dd rollers.
so according to my unscientific study
if this car made 507 on hub dyno it would be around 457 on a dd.
i hope atleast someone appreciates it ive just spent 15 minutes of my life sorting this post out lol
skyline made 500 whp on dd rollers shows 350 whp in 4th gear on gtech
supra was dynoed on rototest hub dyno like a dynpack, made 757 whp, gtech shows 550 whp for 4th gear.
so the results show that dd rollers showed 150 hp above my gtech, the hub dyno shows 200 hp more than the gtech, so roughly speaking in theory if my supra made 757 on hub dyno it would make about 707 whp on a dd rollers.
so according to my unscientific study
if this car made 507 on hub dyno it would be around 457 on a dd. i hope atleast someone appreciates it ive just spent 15 minutes of my life sorting this post out
lol
23-07-2011, 07:41 PM
#59
even if that was the case then i doubt the error would just be 50bhp off no matter what the power, imagine running an old 998 mini, or my mums 2cv, it would make negative horsepower
Any dyno is as good as its operator, be it dyno dynamics, dyna pack or whatever.
this place proved to be pretty accurate with my old engine, as a t3 running 1.5 bar should make about 300bhp, and mine made 300 as it did on enhanced penis's DD rolling road.
Any dyno is as good as its operator, be it dyno dynamics, dyna pack or whatever.
this place proved to be pretty accurate with my old engine, as a t3 running 1.5 bar should make about 300bhp, and mine made 300 as it did on enhanced penis's DD rolling road.
Last edited by fraser9764; 23-07-2011 at 07:45 PM.
23-07-2011, 08:14 PM
#60
Boost addict
Was good to see u guys again today glad u came along 2 really strong cosworths which sound really good. Was also good to finally meet tony as well absolute top fella. Oh and scoffs r5 made 497 torque. Be interesting at next day in october as he will have new turbo etc and 750 is the aim.
haha
24-07-2011, 11:03 AM
#69
not sure what the issue is yet, will try another set of inj. fuel filter has been changed, pump wiring has been re-newed. pump not been changed. the stack dash has a function to monitor low fuel pressure. if i can figure out how to set it up.
.
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24-07-2011, 04:11 PM
#71
10K+ Poster!!
Good power that.
24-07-2011, 07:14 PM
#77
Capri Racing driver
Join Date: Jul 2011
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Dynapack says that drivtrainloss on rwd cars measured on hub`s normaly never go higer than 35hp.
24-07-2011, 08:28 PM
#78
10K+ Poster!!
iTrader: (4)
rototest is regarded as one of the besy hub dynos available
white papers here
http://www.rototest.com/function/fun...P&FileType=pdf
10% is more like the correct loss through a hub dyno.
they have done extensive testing one here of a mazda mx5 with hub power divided by 0.88 to achieve accurate engine power.
http://www.rri.se/popup/performanceg...p?ChartsID=404
and a whole catalogue of test vehicles here
http://www.rri.se/index.php?DN=29
its a god assumtion to work on whp + 12% and be reasonably accurate for realistic figures imo or flywheel power - 10.5% for hub power.
if the correction factor used has been 1.18 it made 429 hub power, so adding 12% would make 480 hp which in all honestly is more what is expected is it not ?
i have seen a skyline graph on tdp dynapack and there awd loss was just 1.1 so 10%.
Last edited by scoooby slayer; 24-07-2011 at 08:29 PM.
24-07-2011, 09:10 PM
#79
Capri Racing driver
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Over here in Norway, many have started to only talk about, hub hp or Wheel hp. Engine hp is only "real" if the engine is dyno`d alone.
Drivetrainloss seems to be a hopless thing to measure corect.
And inn the end the only power you have is whats at the wheels.
Drivetrainloss seems to be a hopless thing to measure corect.
And inn the end the only power you have is whats at the wheels.
Last edited by as.; 24-07-2011 at 09:11 PM.
