Bolt-on Garrett GT35R turbo for 911
03-17-2005, 11:35 PM
#31
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Tim, I have the GT maps and since I know what the HF does, I can say that wheel for wheel the HF wheel is more efficient than the GT wheel. As far as the turbine side, I think that Porsche and KKK new what they needed for a successful application. They started with the 3LDZ, they went to the large 7006, then they settled on the 7200.. The GT35 is a good turbocharger.. The primary design of the GT series is for drag engines.. The GT35 is a good unit, but not as good as the HF..
03-18-2005, 09:29 AM
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Originally Posted by TurboTim
Like I said before, watercooling could be adapted to the 911 fairly easily.The weight penalty will not be too great if you use a small resivoir(maybe a gallon and half) an aluminum radiator(an oil cooler should work efficiently) and a turbo waterpump from a 944T. Now I would only go through all this trouble if it was a track car. For a street car I know it is not neccessary because we have run these turbos without watercooling for years without failures or problems.
I'll be talking to you soon.
Later!
03-18-2005, 07:25 PM
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Originally Posted by Kevin
Tim, I have the GT maps and since I know what the HF does, I can say that wheel for wheel the HF wheel is more efficient than the GT wheel. As far as the turbine side, I think that Porsche and KKK new what they needed for a successful application. They started with the 3LDZ, they went to the large 7006, then they settled on the 7200.. The GT35 is a good turbocharger.. The primary design of the GT series is for drag engines.. The GT35 is a good unit, but not as good as the HF..
I would be willing to do some testing with both turbos if we can find a 930 guy that is up for it. I know for a fact that the GT35R will outperform just about anytihng out there. Ofcourse the dyno wont lie either;^)
03-18-2005, 07:54 PM
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Originally Posted by TurboTim
I would be willing to do some testing with both turbos if we can find a 930 guy that is up for it. I know for a fact that the GT35R will outperform just about anytihng out there. Ofcourse the dyno wont lie either;^)
I am in the process of doing Stephen's Euro fuel head mod, but I anticipated upgrading to Kevin's latest K27HF offering via Ignacio Borrel in Seattle, WA (I bought Iggy's former 930). I actually have a business associate who has a Dynojet in his facility. This is the place where I was the former Marketing Director (SRT- Swift Racing Technologies www.swiftracing.com). I'd be more than happy to offer my "Seattle Sue" for tesing purposes.
Let me know.
03-18-2005, 07:57 PM
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There are many HF owners that have dyno sheets.. However as you will find out. they are all running at stock wastegate spring levels due to the fact that the HF maxes out the fuel system, fuel head mods are definately recommended. I wish you the "best of luck"
03-18-2005, 10:16 PM
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Originally Posted by Kevin
Lexlyf, I was aware that Ignacio had a newer K27-7200.. as he told you the new HF2 will be out shortly..
I had originally hoped to have the Euro fuel head completed along w/ the HF2, but timing did not allow for it. So now, I offer my 930 as a test mule. I had about 47k on the dial when I picked up from Seattle. Now I have about 52k mostly because of the trip back home.
03-18-2005, 10:35 PM
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Originally Posted by Kevin
Lexlyf, I was aware that Ignacio had a newer K27-7200.. as he told you the new HF2 will be out shortly..
03-20-2005, 02:43 PM
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The HF is reference to my large high efficient compressor wheel that can be installed/CNC'd into 7200, 7006, K28's and K29's.. Zero Clearance is my process of running the compressor wheel to a "0" clearance between the blade tips and housing.. The benifit is that that the compressor side efficiency jumps to the mid 90%.. Boost is available sooner, and faster... Engine torque builds earlier as a result..
03-20-2005, 03:05 PM
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Originally Posted by Kevin
The HF is reference to my large high efficient compressor wheel that can be installed/CNC'd into 7200, 7006, K28's and K29's.. Zero Clearance is my process of running the compressor wheel to a "0" clearance between the blade tips and housing.. The benifit is that that the compressor side efficiency jumps to the mid 90%.. Boost is available sooner, and faster... Engine torque builds earlier as a result..
Thanks for the info. What happens when the rates of expansion are different for the turbine wheel and the turbine housing? Is zero clearance at operating temperature or "cold" temps?
TIA
03-20-2005, 03:27 PM
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Dave, the zero clearance process is applied to the compressor (cold) side of the turbocharger. The process takes RPM, temperature and casting shift into account..