ital_cossie

iTrader: (2)

hello,
i want to fit on my cosworth a 2wd cosworth manifold with a Gt3076R turbo, i want to know the exact thickness of the spacer between the two pieces.

Thanks!

PS. i have a mongoose downpipe it will fit straight or i have to modify it?

Rockhound

If your turbine housing is A/R .60 you dont need any spacer. But the downpipe will need to be modded a little.

ital_cossie

iTrader: (2)

my turbo is .63 internal gated.

charlie luciano

iTrader: (3)

No spacer needed fella, I have a gt30/71 with a .82 housing and there's no spacer gasket in mine


Luciano

BRAMMER

iTrader: (23)

In what way?

I was under the impression they where only needed if you were running ex gate or you wanted to clear the original damper mount on a 2wd head.

I'm having the bracket milled off mine whilst it's at the machine shop

Rockhound

Brammer: If you use the turbine housing that comes with the turbo, you need to extend the downpipe a little and convert it to v-band. If its a internally gated housing in OE cosworth spec. from atp turbo i dont think the downpipe needs modifications, but do not know for sure.

The spacer is needed when going external gate, OR if the compressor housing is A/R .70.
If it is A/R .60 it will just clear the manifold without spacer.

The GT3071 and GT3076 both comes with .60 or .70 compressor housings and with or without antisurge. It depends on the serial number and what year they are produced in.

BRAMMER

iTrader: (23)

Mine is a .60 anti surge with a 3 stud rear housing and internal gate - fits straight up

Rockhound

Perfect. My old turbo was the same as yours, but with V-band. Worked perfectly. Full boost at 4500 rpm with .82 housing.