jtm7878

Yes, did a search and can't find a laundry list of what I need. I have a 1988 RX7 Turbo II. I wish to upgrade the turbo to a T4. Can anyone tell me what I need to complete the installation/upgrade?

I am going to buy a T3/T4 Turbo -

gsracer

Don't buy a t3/t4

a t3 exhuast side is smaller than the stock hot side, you'd also have to buy a new manifold.

If you mean a hybrid stock turbo with a to4 compressor wheel/housing then you're going to need:

1. bigger fuel pump
2. bigger injectors
3. some sort of way to control the above injectors
4. either retard overall timing, or find a way to control ignition spark
5. If you want to run over 11-12 pounds and not heat the absolute **** out of the air - front mount

There's a million combinations that will work, the above is just general requirements, how you choose to do that is completely up to you.

Rpeck

you keeping the stock external hot side?

Matlock

A T3/T4 can be used on an RX. It's a matter of sizing it appropriately that's the key.

gsracer

sure, but why bother? If you're buying an entire new turbo I don't see the point in not going t04

Matlock

I'm not going to argue with that point. But.....it's not because it's overly small. One could save a $100-200 going T3/T4 over the T4.