New Dyno Numbers - 638 RWHP - 624 RWTQ ( what the HP at the block ) - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

advfire · 08-24-2010, 02:45 PM

2010 camaro LS3 motor-Ran a test on a new mustang DYNO today. car hit 638 rwhp and 624 rwtq. many people have made comments that the mustang numbers are more true but are about 8 to 12 percent below and dynojet, in addition the flywheel horsepower would be even 12 to 15 percent more. At my present numbers at the rear wheel would this mean my motor is pushing 775HP at the flywheel, does this sound right???

SlingShot · 08-24-2010, 03:10 PM

Using a 15% loss, it would be closer to 750 ...

JANNETTYRACING · 08-24-2010, 03:13 PM

Quote:

Originally Posted by advfire

2010 camaro LS3 motor-Ran a test on a new mustang DYNO today. car hit 638 rwhp and 624 rwtq. many people have made comments that the mustang numbers are more true but are about 8 to 12 percent below and dynojet, in addition the flywheel horsepower would be even 12 to 15 percent more. At my present numbers at the rear wheel would this mean my motor is pushing 775HP at the flywheel, does this sound right???

What is your Set up?

AndrewZPSU · 08-24-2010, 03:41 PM

Easy way to figure your wheel hp to engine hp is to divide by .85... or .8 for an auto.

TommyTSquared · 08-24-2010, 03:58 PM

Quote:

Originally Posted by AndrewZPSU

Easy way to figure your wheel hp to engine hp is to divide by .85... or .8 for an auto.

Or if you want to go from rwhp to flywheel... multiply by 1.15 or 1.2 for an auto!

math is fun!

Crowley · 08-24-2010, 04:05 PM

Quote:

Originally Posted by TommyTSquared

Or if you want to go from rwhp to flywheel... multiply by 1.15 or 1.2 for an auto!

math is fun!

not too fun as that doesn't work out ...

ex.

650 / .85 = 764.7
650 * 1.15 = 747.5

I think the / .85 way is correct ..

Crowley

advfire · 08-24-2010, 04:07 PM

maggie with 10 lbs bost
stage 2 cam
CAI
kooks 3' full headers to tip
meth injection
160deg ther

question is if you all think 750 would be a valid number using a mustang what do you think i would get using a dynojet?

midgard · 08-24-2010, 04:08 PM

Multypling by 1.15 is more reasonable.

If a typical stock ls3 is 370...multiply that by 1.15 and you get 425.5

TommyTSquared · 08-24-2010, 04:12 PM

Quote:

Originally Posted by Crowley

not too fun as that doesn't work out ...

ex.

650 / .85 = 764.7
650 * 1.15 = 747.5

I think the / .85 way is correct ..

Crowley

brb... doing this on pen and paper! lol

So the formula would be: x(1-y) = z

x = flywheel
y = % (15 for manual and 20 for auto)
z = rwhp

going from rwhp to flywheel would be: z/(1-y) = x

Crowley · 08-24-2010, 04:15 PM

Quote:

Originally Posted by advfire

maggie with 10 lbs bost
stage 2 cam
CAI
kooks 3' full headers to tip
meth injection
160deg ther

question is if you all think 750 would be a valid number using a mustang what do you think i would get using a dynojet?

it depends on how the dyno was set up ...

Just say the mustang dyno reads say 3 % lower than a dynojet ..

638 / .82 = 778

On a dynojet it could read 661 rwhp (778 / .85)

Again .. all depends on how the dynos are setup etc .. use the dyno as more of a tool for mods and see differences ...

Crowley

advfire · 08-24-2010, 04:16 PM

manual,

i guess the real question is if im getting 638 on a mustang what would i get on a dynojet and then what would be my end horsepower

advfire · 08-24-2010, 04:18 PM

Quote:

Originally Posted by advfire

manual,

i guess the real question is if im getting 638 on a mustang what would i get on a dynojet and then what would be my end horsepower

reason being is that the orignal horsepower rating from chevy was posted on a dynojet, using the same type of gauge would be what i would compare with...

Crowley · 08-24-2010, 04:38 PM

Quote:

Originally Posted by advfire

manual,

i guess the real question is if im getting 638 on a mustang what would i get on a dynojet and then what would be my end horsepower

I'm not sure what you mean by end horsepower ... in the post just above this one I have an example (say if there is a 3% difference between a mustang and dynojet numbers). Your Engine HP is constant and will be the same on both, but your rear wheel HP will be different because one will read say 15% loss and the other maybe 18% loss ..

Crowley

advfire · 08-24-2010, 07:20 PM

Quote:

Originally Posted by Crowley

I'm not sure what you mean by end horsepower ... in the post just above this one I have an example (say if there is a 3% difference between a mustang and dynojet numbers). Your Engine HP is constant and will be the same on both, but your rear wheel HP will be different because one will read say 15% loss and the other maybe 18% loss ..

Crowley

i guess it was my understanding that a mustang was about a 8% difference then a dyno and then 12% to 15% loss to the wheel. this is what i was interested in knowing

08-24-2010, 02:45 PM	#1
advfire Drives: 2010 SS Black Join Date: Jul 2009 Location: Parkland, Florida Posts: 171	New Dyno Numbers - 638 RWHP - 624 RWTQ ( what the HP at the block ) 2010 camaro LS3 motor-Ran a test on a new mustang DYNO today. car hit 638 rwhp and 624 rwtq. many people have made comments that the mustang numbers are more true but are about 8 to 12 percent below and dynojet, in addition the flywheel horsepower would be even 12 to 15 percent more. At my present numbers at the rear wheel would this mean my motor is pushing 775HP at the flywheel, does this sound right???

08-24-2010, 03:10 PM	#2
SlingShot Drives: 2012 ZL1 - #670 Join Date: Jun 2009 Location: Seminole, Fl. Posts: 8,009	Using a 15% loss, it would be closer to 750 ... __________________

08-24-2010, 04:08 PM	#8
midgard Drives: red jewel camaro Join Date: Aug 2009 Location: Northwest Indiana Posts: 524	Multypling by 1.15 is more reasonable. If a typical stock ls3 is 370...multiply that by 1.15 and you get 425.5 __________________ 2010 Red Jewel Camaro ss/rs A6/L99 POWER NUMBERS....874 rwhp/880 rwtq!! 9.81@142.02 Livernois 2nd Place Car Camaro5 Fest Original Build 13 psi/nittos.....10.44@134 3.6KB/3.5 pulley/Stock t/b..Best 9.967@142.01 SSJ3...is done....mid 9s?Rossler 6l80E Transmission KB 3.6LC,17" Bogarts, Thanks to Hendrix 9", Thanks to Pfadt original T/b and converter, 419ci stroker (NO LSX Block)

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08-24-2010, 03:41 PM	#4
AndrewZPSU Drives: 2014 Corvette M7 Join Date: Aug 2010 Location: West Chester, PA Posts: 8	Easy way to figure your wheel hp to engine hp is to divide by .85... or .8 for an auto.

08-24-2010, 04:07 PM	#7
advfire Drives: 2010 SS Black Join Date: Jul 2009 Location: Parkland, Florida Posts: 171	maggie with 10 lbs bost stage 2 cam CAI kooks 3' full headers to tip meth injection 160deg ther question is if you all think 750 would be a valid number using a mustang what do you think i would get using a dynojet?

08-24-2010, 04:16 PM	#11
advfire Drives: 2010 SS Black Join Date: Jul 2009 Location: Parkland, Florida Posts: 171	manual, i guess the real question is if im getting 638 on a mustang what would i get on a dynojet and then what would be my end horsepower