Power Graph Thread - Page 6

alundra · #51 08-09-2007, 02:23

So, can we refer for all dyno that 18% of power is lost to transmission?
Because i have my first dyno tomorrow and i need this spec.

PukkaSilvia · #52 08-09-2007, 09:42

You cant find out the true transmission loss just by measuring the power at the wheels.

Although it is not very not accurate,the rolling road machine will calculate losses for you. That is why the operator coasts down the car on the rollers from high rpm in neautral.

People talk about a percentage you can use yourself to work it out. That is just from averages over time. The average rear wheel drive road car with between 100 and 200 bhp loses about 17% of the engine bhp as transmission losses.

Only way to know the true transmission loss is to measure the flywheel power on an engine dyno and the wheel power on a chassis dyno and take one away from the other

alundra · #53 11-09-2007, 16:51

As promised:

ChEsTeR · #54 11-11-2007, 09:55

Am i reading it right??
200 HP and 350 Nm. Is it a diesel?

And this is mine from yesterday wit a T28@1,3 Bar

umpkin · #55 11-11-2007, 10:31

thats 258 ft/lb

alundra · #56 04-03-2008, 18:10

What an insult a diesel for my s12

Yes units here are different.

rpettafor · #57 31-05-2009, 14:13

did another run at surrey rolling road yesterday, all ive done since the last time is fix my turbo. graphs -

rob turbo · #58 02-06-2009, 23:05

i take it these are flywheel power fig's..

they usealy are, nice power, that spec you got..

rpettafor · #59 10-06-2009, 17:31

Quote:

Originally Posted by rob turbo

i take it these are flywheel power fig's..

They usealy are, nice power, that spec you got..

Quote:

Originally Posted by rpettafor

its got a t3 turbo, a cossie intercooler, external wastegate, stainless steel exhaust, bov, greddy profec b spec 2 and cone filter.

..

sideways danny · #60 11-06-2009, 01:53

Rob, That's going REALLY too lean from about 4.5k. Is that not detting? get the boost turned down or you're going to melt a piston