Help me think this through

[ser1992]

I have a full Revshift manifold with a T4 flange.

I have a Holset HX35 which is a split pulse T3 flange

What are your suggestions?

• Should I sell the hx35 and find a T4 turbo (which isnt to big to spool)?
• Should I weld a T3 flange onto the manifold and buy a Bullseye Performance non-divided hot side?
• Is it possible to fit a T4 flange onto an HX35 (would it be worth it?)

I'm all ears! :p

[sayed ali]

If it is a good design / quality manifold + you've a good internals mods, then a T4 turbo would be the best choice IMO.. or you can use an adapter from T3 to T4 (divided although)

[ser1992]

It's a good manifold: https://www.revshift.com/shop/turbo-...-1983-1991.php


I have a stock bottom end with a built head (welded water jackets, billet 272 cam, IE HD rockers, etc)

[ser1992]

[codrum]

If it were me I would rather have a working t3 setup rather than sticking with a t4 manifold and turbo. How big is your turbine housing on the HX35? If it's too big and you're looking to downgrade now is a good time to pick up a Bullseye Power housing that fits your build better and is not split-pulse. Slap a t4-t3 adapter on the revshift manifold and you're good to go. This also makes it easier to change your turbo down the road since t3 turbos are extremely common.

[ser1992]

its a 12cm now, I believe I can get the single scroll in a 12cm or 14cm. I will try to stick with the 12cm for a better spool time.