Precision DBB T66?? Who has it? Compared to GT 35/40?
i am buying a turbo for my new car. i want a gradual ball bearing spool unlike my old t78. any suggestions?
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The Turbonetics T66 you can expect to go 650+RWHP on race gas at 30PSI
While the GT3540 will go 525+RWHP on race gas at 20PSI (from what I have seen the Garrett turbo will nose over after 20PSI) All depends on what you after in the long run ??? Obviously the Garrett should spool a little faster than the Turbonetics due to the difference in size etc. |
i would love to see a dyno at 20psi comparing the precision t66 and the gt 35/40. thanks for the reply.
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t66 all the way.
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I had the exact same question a few weeks ago and then I talked to Shawn at A-spec, who's supplying the GT35/40. I'm going with the Garrett! Positive boost by 2200 RPM and 15psi by 3300!!
He said a guy dynoed 487 RWHP @ 19psi on pump gas. That's what I'm talking about! I'm getting an aggressive street port and 3mm apex seals with my new build, so I can't wait to see what I put down. Should be another month or so...it's still sitting at Marvel Speed. |
Originally posted by ianewk I had the exact same question a few weeks ago and then I talked to Shawn at A-spec, who's supplying the GT35/40. I'm going with the Garrett! Positive boost by 2200 RPM and 15psi by 3300!! He said a guy dynoed 487 RWHP @ 19psi on pump gas. That's what I'm talking about! I'm getting an aggressive street port and 3mm apex seals with my new build, so I can't wait to see what I put down. Should be another month or so...it's still sitting at Marvel Speed. |
Very interesting info there ianewk thanks .............. Well I can tell you that on my setup with a Turbonetics T66, Q trim rear wheel, ceramic ball bearing, turbo ported S4 block with S6 upper intake manifold, pump fuel with methanol enrichment activated in the higher rpm's I am making boost at 2500 rpm and 15 PSI by 3500 rpm. At 5000 rpm I am making 350 rwhp and at 18 PSI my setup is making 500 rwhp. I have since cranked the boost up and have made 600 rwhp on 27 PSI. I guess the main thing that numbers can't answer is the transient response between the turbo's ???
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Originally posted by yogi Very interesting info there ianewk thanks .............. Well I can tell you that on my setup with a Turbonetics T66, Q trim rear wheel, ceramic ball bearing, turbo ported S4 block with S6 upper intake manifold, pump fuel with methanol enrichment activated in the higher rpm's I am making boost at 2500 rpm and 15 PSI by 3500 rpm. At 5000 rpm I am making 350 rwhp and at 18 PSI my setup is making 500 rwhp. I have since cranked the boost up and have made 600 rwhp on 27 PSI. I guess the main thing that numbers can't answer is the transient response between the turbo's ??? |
PM sent .......... what other info are you after ???
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440rwhp @17 psi, stock block pump gas, Starts to make boost at 2200rpm has 15 psi @3000 spike to 18 by 3300. I dont think it will come close to the T66 on the top end but the GT35/40 is a great street turbo. I am impressed with how fast it spools. When I shut the car off I can hear it spinning for another 1-2 min.
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whos doing your tuning zoomzoom.
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ZoomZoom .............. I guess there is also a lot a difference in the seat of the pans feeling between our cars too as my car is an RX3 weighing in at a whopping 2500lb wet with me on board :D
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Dave at KD rotary.
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Has anyone actually wound there GT35/40 over 22psi?? and does it hold it all the way to 8500rpm??
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Damn thats impresive.
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There's been a change in plans.
After dealing with the drama of who has one, who doesn't, where I can get one, and how long it will take...not to mention who can rebuild it when something goes ping or boom... ...I've decided to go with the Turbonetics dual BB T-66 with all the trimmings (polished inside and out, oil and water injection, ceramic coating, etc). It should be about a month or so until I get it back from MarvelSpeed, plus break-in time. After that I'll share the numbers. Until then let's just say really fast. :D |
Cool ........ can't wait to see how it goes on your setup :D
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