Quote:
Originally Posted by idahotuner
hey cody, which trim you running 56?
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On the compressor side, yes the 56 trim A/R. However let it be known that A/R changes on the compressor side typically make for less to zero difference in HP, assuming th rest is the same. Will it change a few aspects? Yes technically, but it won't effect spool up and that sort. It's really interesting to read about how little an A/R change on a compressor effects power...very unlike the turbine sections which can make large differences.
Quote:
Originally Posted by idahotuner
my sr i am putting together right now is a 2.2 mazworx block, last set up i posted earlier in this thread on a stock block i made 416 with a gt2871r .64
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I still wish they never used that correction factor with your dyno. Shame on that dyno shop.
This is why when I run the dyno days, it's always give people uncorrected and STD numbers. It's amazing to see people running wild CF's to make pwoer, it's just not fair.
Quote:
Originally Posted by longfellow
You dont need 18psi on track when 14psi will do just fine. There are a lot of people who track SR cars with no real issues. I also think the Pignose front bumper creates a huge cooling problem.
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Correct. I run 12 and sometimes 16 when I wanna pass a higher power car that parks in the corners. No issues here after 4 years.
Quote:
Originally Posted by idahotuner
what do you guys think about the t2 gt3071r. i am seeing if they have a .64 version versus the .86. the problem i noticed with my gt2871r .64 was back pressure cause my pistons to get screwed up on the exhaust side but they were stock pistons. seems like a gt30 wheel with housings about the same size as gt2871, will flow more making a little more top end, with about the same boost response.
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I don't like the idea with such a small housing. However the backpressure didn't cause any 'ruining' on the pistons, that is what detonation was. Certainly backpressure can help induce a detonation prone sitution, but typically the detonation is already there.
Quote:
Originally Posted by idahotuner
so is that a gt2871 wit ha gt3071 housing on the front an an atp t2 external gated turbine housing?
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On paper it sounds like a fantastic idea, but as before, the biggest drawback has always been the turbine housing as the restriction. With a proper backside it may prove to be a 'hot setup'. For me, it was just easier to adapt a external gate onto the manifold than spend all the cash again hehe.