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Garrett Gt35 Turbine Housing Question

Shaun

By Shaun,
in Engines & Forced Induction

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Shaun Mentor

Shaun

Posted
Posted

Hi,

Im just wondering if anyone has experienced a similar problem. Ive got a GT35r high mount turbo on an RB26, and i had the dumpipe and exhaust fabricated while the turbo had a 0.82ar turbine housing. Ive since had to change to a 1.06ar turbine housing and, while the turbo sits in exactly the same position, the exhaust now doesnt line up by a significant margin. I understand the housings are different, but i would have thought that they may have been interchangable without significant modification to the exhaust.

The reason why im asking is that i also took my exhaust off, so im wondering whether its the new turbine housing or (incorrect) fitment of the exhaust.

Has anyone had experience whith this problem?

Thanks,

Shaun.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Isnt the turbine housing a bit longer? to makeup the 1.06?

Not just wider... hrm. I cant remember when i had a .63 and .82 what the difference was side by side.

If it is longer, then that would indeed push the whole setup back "X" amount and thus things wouldnt line up.

Shaun Mentor

Shaun

Posted
  • Author
Posted

^^^^^^ Thats what i wanted to know, thanks.

It doesnt really make sense; the dump pipe is in exactly the same position as it was with the 0.82; if it was out even slightly it would foul on something because the tolerances in that part of the engine bay are so tight. Something else is going on but im buggered if i know what it is. There is only one way an exhaust can go on!

Oh, i dont have the 0.82 anymore to compare.

Shaun.

Shaun Mentor

Shaun

Posted
  • Author
Posted

Theyre both external gate.

Aparently the boost was uncontrollable with the 0.82 housing, hitting about 17 psi at about 2000 rpm. This was with a 9:1 compression ratio and 44mm external gate. Hopefully it'll be a little more relaxed with the 1.06 housing. Ive just gotta get that f**king exhaust modified first.

Shaun.

Shaun Mentor

Shaun

Posted
  • Author
Posted
17 psi at 2000 rpm, i dont think so. would be near double that.

Why dont you think so, mate? Thats why im going through this whole process. If it made 17psi at 4000rpm id be happy, and not be bothered changing to the 1.06. Besides, its an atypical engine set up.

I dont know what your basis was for making that comment.

GTR1993 Mentor

GTR1993

Posted
Posted
Why dont you think so, mate? Thats why im going through this whole process. If it made 17psi at 4000rpm id be happy, and not be bothered changing to the 1.06. Besides, its an atypical engine set up.

I dont know what your basis was for making that comment.

Oh just seems alot faster then anyone else is getting, i wish my setup would perform like this! Id be very happy.

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