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Trav40111 · 10-29-2009, 05:09 PM

Figured I'd post this here.. as it may get more attention..

I'm trying to avoid a laggy, out-dated turbo.. and figured I'd give a 67mm unit a try. This is based on the newer GT series stuff from Garrett, and is very efficient. The T67, with a Q-trim turbine, is rated 750-800hp. I plan on making around 600-650whp, but, want to keep some area under the curve.. I figure that a PT67 with Q-trim turbine, and .81 A/R T4 housing, will come into boost at around 2800-3K rpm.

This is on a 4 valve, 8.8:1 C/R motor, with some moderate head work, and stock cams. Ported 99 Cobra intake manifold..

I went ahead and ordered this, today..

Precision- Billet 6765, with .81 A/R T4 undivided housing. This turbo has made over 750whp on single turbo 3 liter Supra's.. so, I see no reason that I can't get some big numbers out of it as well. I talked to Precision about it today, and he assured me that 600whp on pump gas would not be a problem with my setup. He also said that his boss has a 3 valve with the older (non-billet) 67mm, and it starts making boost at about 2500rpm.. full boost (15psi) by 3200rpm. Sounds like it's exactly what I'm looking for.

Travis

10-29-2009, 05:09 PM	#1 (permalink)
Trav40111 Banned Join Date: September 2009 Location: Louisiana Posts: 113 0.65 per day Trader Rating: (1)	Single billet Precision 67mm? Figured I'd post this here.. as it may get more attention.. I'm trying to avoid a laggy, out-dated turbo.. and figured I'd give a 67mm unit a try. This is based on the newer GT series stuff from Garrett, and is very efficient. The T67, with a Q-trim turbine, is rated 750-800hp. I plan on making around 600-650whp, but, want to keep some area under the curve.. I figure that a PT67 with Q-trim turbine, and .81 A/R T4 housing, will come into boost at around 2800-3K rpm. This is on a 4 valve, 8.8:1 C/R motor, with some moderate head work, and stock cams. Ported 99 Cobra intake manifold.. I went ahead and ordered this, today.. Precision- Billet 6765, with .81 A/R T4 undivided housing. This turbo has made over 750whp on single turbo 3 liter Supra's.. so, I see no reason that I can't get some big numbers out of it as well. I talked to Precision about it today, and he assured me that 600whp on pump gas would not be a problem with my setup. He also said that his boss has a 3 valve with the older (non-billet) 67mm, and it starts making boost at about 2500rpm.. full boost (15psi) by 3200rpm. Sounds like it's exactly what I'm looking for. Travis