Numerically taller final drives... who makes them.

[RedShred]

'90 240sx Non HICAS. I'm looking for a numercially higher (lower gears) rear end... something in the 4.5:1 ratio...

does anybody have any contacts, catalogues?

[mattback]

nismo

[C-Kwik]

Nissan MotorSports USA. (310) 538-2610.

[MainEvent212]

jesus! 4.5...?

what r u plannin to do with that?

[RedShred]

corner to corner *evil grin*

I am running an all-motor SOHC. I have 4 grand in the motor already but want 13's without boost or N2O. I figure the best way is to increase the final drive so I can accelerate faster...

Really, I'm looking for a mechanical 2-way in that gear range. I've seen Nismo rear's... very spendy. But it's worth it for what I want to do.

Once I upgrade the Computer to move the Revlimiter to 7500rpm, the lower gear'd rear will not effect top end, in the sense I am going for...

Also remember, this is NOT my daily driver.

[mattback]

you can run any r200 you want with the r&p set

[C-Kwik]

corner to corner *evil grin*

I am running an all-motor SOHC. I have 4 grand in the motor already but want 13's without boost or N2O. I figure the best way is to increase the final drive so I can accelerate faster...

Really, I'm looking for a mechanical 2-way in that gear range. I've seen Nismo rear's... very spendy. But it's worth it for what I want to do.

Once I upgrade the Computer to move the Revlimiter to 7500rpm, the lower gear'd rear will not effect top end, in the sense I am going for...

Also remember, this is NOT my daily driver.

Couple of things:

A lower rear gear will not do anything for you once you get in the gear ratio range you already have. The only increase you will really notice is in first gear. After that, you won't feel a difference in overall acceleration.

As far as the rev limiter, moving it to 7500 RPM is good, but only if you are still putting out more torque in the high RPM's. I've roughly mapped out a Dyno chart of a stock KA against the transmission's gear ratios, and I strongly speculate you won't gain a whole lot by raising the rev limit alone. I don't know what you've done to your motor, but You'll likely need a higher lift cam and possibly some headwork to make best use of a higher rev limit. And if you are still using stock rods, you might want to verify if Nissan Motorsports or JWT knows the rev limit for the rods. Tensile loads will increase dramatically with higher RPM. So will oil flow requirements to the con-rod bearings.

[lessthanjakejohn]

Im not really sure about this but If you did this would you have to incorporate an extra shift into your run, if thats the case wouldn't this be a very bad idea?