Wheel Horsepower/Torque

1ssa_camaro · 06-12-2020, 01:48 PM

Hey guys, just installed my headers/e85 flex fuel kit with tune. I also have a GM CAI. I dynoed at 437 WHP and 451 Wheel torque. Any idea on what that would be at the crank. My tuner says his dyno reads lower than most dynos around my area.

RyanR623 · 06-12-2020, 02:16 PM

Quote:

Originally Posted by 1ssa_camaro

Hey guys, just installed my headers/e85 flex fuel kit with tune. I also have a GM CAI. I dynoed at 437 WHP and 451 Wheel torque. Any idea on what that would be at the crank. My tuner says his dyno reads lower than most dynos around my area.

17% or thereabouts drivetrain loss for the A8's.... 503hp

Altered Carbon · 06-12-2020, 02:40 PM

Quote:

Originally Posted by RyanR623

17% or thereabouts drivetrain loss for the A8's.... 503hp

I would agree with this. 17-19% for an auto. I have an auto but only went with a drive train loss of 15% to get 1350 crank hp.

I would say you're at 510-520 hp and 525-535 tq at the crank.

c4racer · 06-12-2020, 03:30 PM

Pretty strong motor and a good tune it seems to me!

Bohanan23 · 06-12-2020, 03:37 PM

Who cares about crank #'s? Hopefully you aren't out bragging about crank #'s

Altered Carbon · 06-12-2020, 04:17 PM

Quote:

Originally Posted by Bohanan23

Who cares about crank #'s? Hopefully you aren't out bragging about crank #'s

I say brag away. When I'm asked, I'll respond with 1000, but I'm right at 1400 at the crank with a 19% loss in an automatic. I put 1350 in my car info on here, that's a 15% loss. 1174rwhp is the actual dyno #. Who cares what # you say if it's accurate in any capacity? Crank or to the wheels.

arpad_m · 06-12-2020, 04:21 PM

Quote:

Originally Posted by Bohanan23

Who cares about crank #'s? Hopefully you aren't out bragging about crank #'s

Well, US manufacturer specs also list crank horsepower/torque numbers, so it has some limited use for comparison to stock numbers, even though not overly useful in practice indeed.

1ssa_camaro · 06-12-2020, 07:26 PM

I’m wanting to know for my personal knowledge. I’m not out there telling everyone I see my power numbers

just wanting to know for myself and if anyone asks, why not tell them?

Number 3 · 06-13-2020, 07:28 AM

OP, please pull your engine and put it on an engine dyno to confirm for us

Only way to get that exact number.

And there is an SAE procedure for testing engine HP. No such thing for WHP that I know of.

06-12-2020, 01:48 PM	#1
1ssa_camaro Drives: 2017 Camaro 1ss A8 Join Date: Nov 2019 Location: California Posts: 114	Wheel Horsepower/Torque Hey guys, just installed my headers/e85 flex fuel kit with tune. I also have a GM CAI. I dynoed at 437 WHP and 451 Wheel torque. Any idea on what that would be at the crank. My tuner says his dyno reads lower than most dynos around my area.

06-13-2020, 07:28 AM	#9
Number 3 Hail to the King baby! Drives: '19 XT4 2.0T & '22 VW Atlas 2.0T Join Date: Dec 2008 Location: Illinois Posts: 12,172 View My Garage	OP, please pull your engine and put it on an engine dyno to confirm for us Only way to get that exact number. And there is an SAE procedure for testing engine HP. No such thing for WHP that I know of. __________________ "Speed, it seems to me, provides the one genuinely modern pleasure." - Aldous Huxley

06-12-2020, 03:30 PM	#4
c4racer Drives: 2016 SS Convertible Join Date: Sep 2016 Location: California Posts: 1,108	Pretty strong motor and a good tune it seems to me!

06-12-2020, 03:37 PM	#5
Bohanan23 Drives: 2016 Camaro 2SS A8 Join Date: Dec 2019 Location: Moore, OK Posts: 113 View My Garage	Who cares about crank #'s? Hopefully you aren't out bragging about crank #'s

06-12-2020, 07:26 PM	#8
1ssa_camaro Drives: 2017 Camaro 1ss A8 Join Date: Nov 2019 Location: California Posts: 114	I’m wanting to know for my personal knowledge. I’m not out there telling everyone I see my power numbers just wanting to know for myself and if anyone asks, why not tell them?

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