RA Gearset

Reply Subscribe

Thread Tools

Search this Thread

03-15-2004, 09:32 AM

#46

Egan

Registered User

iTrader: (14)

Join Date: Nov 2001

Location: Peoples Republik of Kalifornia

Posts: 14,221

Car Info: 05 H2 SUT, 45 GPW, 10 Murano, 13 Boss 302

Quote:

Originally posted by rexotua17
I have this gearset and this Spreadsheet is off, it doesnt account for the 1.1:1 conversion....

4th gear redlines somewhere about 105ish mph for me, I havent topped out 5th yet, but it looks like its probably under 140

Actually, that's not correct. It does account for the center differential. All that matters for the calculations is the final drive ratio. The final drive in the WRX is 3.90. Whether you get there with a 1:1 center and 3.9 rear or a 1.1:1 center and 3.54 rear (as in the WRX), the final drive is still 3.9.

The reason you're seeing a difference in the speeds is because these are hypothetical, perfect world calculations. The speeds will, of course, be off due to drivetrain losses, aerodynamic drag, and tire friction.

03-20-2004, 09:56 PM

#47

Speed Element

Former Sponsor

iTrader: (39)

Join Date: Nov 2002

Location: San Jose

Posts: 6,453

Car Info: Evo X, 04 STI, 335i, Fit

fastwrx4me - Not sure what fwhp is unless your in a non AWD Scooby??? But if you mean AWD then 480whp would more than likely break one of these sooner or later.

Mike

(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com

03-28-2004, 12:05 PM

#48

El Supremo

Registered User

Join Date: Jul 2003

Posts: 153

Mike,

How much horsepower do you estimate the RA gearset can hold?

03-28-2004, 10:35 PM

#49

Speed Element

Former Sponsor

iTrader: (39)

Join Date: Nov 2002

Location: San Jose

Posts: 6,453

Car Info: Evo X, 04 STI, 335i, Fit

Quote:

Originally posted by El Supremo
Mike,

How much horsepower do you estimate the RA gearset can hold?

Would not like to stake my name on that to be honest as at the point of most AWD cars over 300whp it becomes issues with drivers and how the car is driven.

We have one in our rally car that is 225whp and abused (no real mods and a restricter in place)

We also have a car that puts out 320whp on a Dynojet with no issues in 15k of driving.

These are the only points of reference I have as the other 10 or so local cars we have equiped (20 or so non local as well) I cannot attest to there HP rating.

I hope this helps but my lack of putting my *** online may not be what is required here