my01s2k

Do you need to upgrade the bottom ends (differential) for the 9lbs boost? or will the stock rear end can handle the boosts?

John_Z

Stock rearend is fine as long as you don't dump the clutch too often.

C4SxM5

you can also check on ebay. i found mine used through a member here.

my01s2k

is 550cc rc injectors sufficent enough handle the 9lbs boost? or is it better just to go with the 650 cc?

Black Nugget

Personally I would go with 650cc injectors - in my opinion it is better to have extra than not enough.

On my last tune with the 3.25" Pulley my tuner saw 9.75psi - he said due to weather conditions I should see another 1-1.5psi under cooler conditions. With a fuel pressure setting at 57psi he said that if I gained that extra 1psi I would have been around 84% duty cycle on the 650cc's. So I honestly think 550's would be too small for 9psi.

Again, this is just my opinion - hopefully a tuner can confirm/deny this!

Black Nugget

I have an 00' with 78k miles - 4k of which were on a Tech2 7psi Pulley, 2k were on a 9.75psi Pulley. No launching the car, but many many hard gear changes. When we took my differential apart not too long ago everything looked fine - however my axles weren't in the same condition, they went bad.

Non-the-less, I still chose to send out my differential internals to www.percryo.com (Performance Cryogenics) for cryo-treatment!