MRey

would a s5 turbo and turbo manifold fit on a s4? Planning on staying with a stock one but i hear the s5's are better. is their wastegate better too?

gsracer

s5 turbo will not fit on your s4 manifold, just like the s4 turbo won't fit on a s5 manifold.


The s5 wastegate is twice the size as it actually has dual wastegates.

MRey

so would it be better to stay with s4 manifold and turbo on my engine cuz im replacing it soon... or should i get an s5 turbo and s5manifold and wastegate for my 88 rx7??

swoop

The S5 turbo and manifold are an improvement over the S4. Go ahead and do the swap if it doesn't cost much.

Rx7Nub

S5 turbo.mani fit fine on the S4, just be sure to get the oil lines. And yes, the wastegate is alot better on the S5 mani, and also the S5 turbo does not have the twin scroll. Get a S5 Turbo/mani, port the hell outta the wastegate, and then get a MBC. That should work good.

MRey

what is an MBC?? Whats the difficulty on porting the wastegate yourself?? Or should i get somebody professional to do it??

Dan H

Its not hard. Do you have a type of rotary power tool with grinding bits?

MRey

yes i do.. can you help me on how to do it?