Question on stock turbo dimensions

[JL8Jeff]

I don't have a turbo Buick, but I'm looking at using the Buick style turbo on my 68 LT1 Camaro. I was wondering what the dimensions are of the turbine mounting 3 bolt flange(center of bolt to bolt). And what size is the opening(2-1/2" or 3")? Also, are the PTE turbine housings the same 3 bolt pattern as stock? Thanks,
Jeff.

 

[JL8Jeff]

Does anybody have a turbo sitting around they can measure? Is it a 3" opening with the bolts centered each 3-1/2" apart? Is it a 2-1/2" opening with the bolts 3-1/2" apart? Any help is appreciated. Thanks.

 

[JL8Jeff]

Anybody? Does anyone have an old turbo mounting gasket laying around that they could measure? Thanks.

 

[GN Greg]

The exhaust inlet hole diameter on the stock turbo with the garrett housing is 2 1/8, and the center to center on the studs is 3 1/16. The PTE housing has the same center to center on studs and it may have a slightly larger inlet diameter.

Greg

 

[JL8Jeff]

Thank you.