Anyone know how to convert 521 rear wheel HP to All wheel HP, and what`s your best estimate of flywheel HP? Thanks

 

Using 18% loss your crank hp should be approx 615 hp.

 

Most agree the difference between RWHP and AWHP is 6%. I would use 18% for AWHP loss and 12% for RWHP loss or thereabouts. To get back to FWHP you want to find the number you started with , not the number you have multiplied by some factor. FWHP= AWHP or RWHP/(1- loss factor) or in your case FWHP = 521/(1-.12)= 521/.88= 593 FWHP.

 

Thankyou gentlemen

 

Stock Porsche 996TT with 415 HP lost
80 HP on a MAHA dyno: 415 crank x 19% == 79 hp (-) == 336 AWHP

The part that baffles me is that why does this same car with a new tune all of a sudden
have a higher drivetrain drag
ex: 600 Crank HP x 19% == 114 hp worth of drag ???

Kevin's formula works perfectly for my car's dyno on a DynaPack using only the
rear wheels and 12% or divide by .88

628 RearWheelHP as measured by a dynapack divided by .88 == 713.6 Crank HP
(most people agree the dynapack reads high and is a bit optomistic), meaning I believe
my actual crank HP is closer to 675-680 which would be about 600 RearWheel HP.

UMW and Protomotive use DynaPack Dynos as they are excellent for TUNING a Porsche!

MK

MK

MK