HP loss from motor to wheels

[webink_EK9]

Whats the aprox HP loss from crank to wheels? I put around 181 to the wheels on my last dynojet run and I was wondering what my motor would be pushing.

 

[bklyneg]

i think 14%. others will be different.

 

[webink_EK9]

So is that about right? 14% loss as general for a b18c itr

 

[jamesA]

15% for FWD, 25% for RWD (i think), 40% for AWD cars...

 

[nismogod]

Originally posted by revolution8k@Jul 22 2004, 04:19 PM
15% for FWD, 25% for RWD (i think), 40% for AWD cars...

[post=366966]Quoted post[/post]​

as a rough estimate of course.

i find it hard to believe tho, that a STi only has 180whp factory. not to argue, just thinkin lol.

 

[JDMilan]

FWD = in the range of 12-16%....don't know exact

 

[JDMilan]

also note that different dynos will yield different HP/TQ figures...

 

[nismogod]

from what i have gathered from alot of ppl, approx power loss is roughly 15% on any setup. AWD may be slightly higher. My buddy todd did an engine dyno and a wheel dyno, with a small block V8. Had a turbo400 and a ford 9"(both of which are HUGE power robbers in comparison to other things) and lost ~16%. RWD

 

[Havok]

AWD loss is around 20-25%, 40% is WAY too high
FWD I want to say is around 10-12%

 

[lowandslow]

yea, 40% is too high..i was gonna estimate about 25%

 

[nismogod]

that sounds better. roughly 12%-17% FWD and RWD. probably around 20ish % AWD

 

[asmallsol]

fI have always heard that FWD is closer to 18%. RWD will rob more power, simply because you have more moving parts

 

[phunky.buddha]

Originally posted by nismogod+Jul 22 2004, 04:35 PM-->

revolution8k

@Jul 22 2004, 04:19 PM
15% for FWD, 25% for RWD (i think), 40% for AWD cars...

[post=366966]Quoted post[/post]​

as a rough estimate of course.

i find it hard to believe tho, that a STi only has 180whp factory. not to argue, just thinkin lol.

[post=366975]Quoted post[/post]​

Uh, no. I'm looking at my roommate's dyno chart right now: 236.3hp @ 5750rpm and 228.3lbft @ 4750rpm. That's totally stock.

 

[jamesA]

Originally posted by Calesta+Aug 3 2004, 10:56 PM-->

Originally posted by nismogod@Jul 22 2004, 04:35 PM
revolution8k

@Jul 22 2004, 04:19 PM
15% for FWD, 25% for RWD (i think), 40% for AWD cars...

[post=366966]Quoted post[/post]​

as a rough estimate of course.

i find it hard to believe tho, that a STi only has 180whp factory. not to argue, just thinkin lol.

[post=366975]Quoted post[/post]​

Uh, no. I'm looking at my roommate's dyno chart right now: 236.3hp @ 5750rpm and 228.3lbft @ 4750rpm. That's totally stock.

[post=372301]Quoted post[/post]​

um yeah thats why I put the (i think) cause I couldn't remember... someone babbled that out at me and I didn't believe them either after doing the math.

So roughly by your Roommates Dyno chart his AWD only lost him 21.3%

 

[phunky.buddha]

Approximately... but the techs at the dealership (the ones that really know what they're talking about) estimate the stock power output at something like 320-330hp, not 300 as advertised.

 

[nismogod]

yikes, thats mad power loss.

 

[JDMilan]

it is and it isn't, it all varies.............either way dyno it and let us know.

 

[jamesA]

Originally posted by JDMilan@Aug 4 2004, 11:10 PM
it is and it isn't, it all varies.............either way dyno it and let us know.

[post=372788]Quoted post[/post]​

but remember every dyno is going to be different.

SCC did an article on this with a Ranger.

 

[smooth95]

That is a lot of hp loss

 

[jeffie7]

Around,......


12-15%FWD 15-20% RWD and 20-25%AWD

oh P.S

350Z makes 287crank HP.

Fully stock 350Zs dyno from 230-250 range depending on if you get a good one =)