.63 ex housing on a stock turbo?

[not-a-hick]

I have read the archives and not found alot of information. I would guess the PTE.63 would be much more effective at higher boost levels and with ported heads and such.... However I am just curious if anyone has any test results of the increased performance (or lack of) on a stock turbo.

 

[DCVING 6]

good question. Just replying so I can track the post.

 

[Donald McMullin]

I ask PT the same questions and they said it would not help. I used an old 0.82 exhaust housing on a stock turbo, but ended up with boost dropping above @4200 rpm because the turbo was not producing sufficient torque to turn the compressor above 23 psig (I'm pushing the limit of this setup).

I did not understand at first what was happening so I did two things: (1) Talked to John Craig, and (2) simulated my setup on Performance Trends Engine Analyzer Pro. Both identified my problem as using the higher exhaust A/R.

I wish I had a PTE 0.63 to test the difference. With the stock G 0.63 exhaust housing the backpressure will get out of site at 22 to 23 psig with my setup.

Not sure about what your goals are, but for the added $150 I am not sure if you will see any improvement unless you are pushing the limit of the stock compressor.

Just my experience. There are many others with a lot more experience in this area.

Deep Enough

Donald McMullin