Changed my TO4S to a 67mm GT wheel. What do you think?
01-21-05, 09:01 AM
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Changed my TO4S to a 67mm GT wheel. What do you think?
In the middle of rebuilding my XS TO4S, I upgraded the comp wheel to a 67mm gt wheel instead of the 61mm old style wheel that it came with. I am told this is like a T67, but with a 1.00 hotside. I was making around 440-450rwhp at 17lbs with the old one so I am hoping with this upgrade plus the new Ground Zero LIM, and some polishing I can hit the 500 mark at 20lbs. What do you think?
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01-24-05, 07:26 PM
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That's what I have. The precision 67gtp. Ported shroud. It supports 75-100 hp
more than a t66 I am told. The sweet spot is 22-23 psi but it is pretty efficient
to 30psi, again, I am told. It made 405 whp at 15psi at 5500rpm. It went fat and
started to creep so we quit. Long story short, we are going tubular man and
50mm wg. I hope to see 420 at 15psi and 475-500 at 22psi. Then we are going
up to 27psi as long as fuel del. is fine. This wheel should be able to give 550-600
whp. It spools a ton quicker than my old t70. The exducer is smaller than a t66
and still gives t70 top end- gotta love gt technology! My exact turbo is on proturbokits.com website- go to turbos- precision street turbos. It goes back to
dyno friday. I'll repost results.
more than a t66 I am told. The sweet spot is 22-23 psi but it is pretty efficient
to 30psi, again, I am told. It made 405 whp at 15psi at 5500rpm. It went fat and
started to creep so we quit. Long story short, we are going tubular man and
50mm wg. I hope to see 420 at 15psi and 475-500 at 22psi. Then we are going
up to 27psi as long as fuel del. is fine. This wheel should be able to give 550-600
whp. It spools a ton quicker than my old t70. The exducer is smaller than a t66
and still gives t70 top end- gotta love gt technology! My exact turbo is on proturbokits.com website- go to turbos- precision street turbos. It goes back to
dyno friday. I'll repost results.
01-26-05, 09:15 PM
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Originally Posted by radkins
In the middle of rebuilding my XS TO4S, I upgraded the comp wheel to a 67mm gt wheel instead of the 61mm old style wheel that it came with. I am told this is like a T67, but with a 1.00 hotside. I was making around 440-450rwhp at 17lbs with the old one so I am hoping with this upgrade plus the new Ground Zero LIM, and some polishing I can hit the 500 mark at 20lbs. What do you think?
Assuming 15hp per lb boost, you would be close to 500 with the old wheel.
I know it doesn't always work out that way, but 480 would seem probable.
I will be happy if I get 450 at 17psi. That would mean 550+ at 27psi likely.
The thing I'm excited to see is how my pwr air to water ic works(temps).
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