the hustler effect. smaller A/R on bigger turbo = better spool.
08-22-2009, 08:02 PM
#41
There are plenty of Suby guys running 3071 and 3076s with .64 A/R. You're giving up a bit of top end, but not anything a sane responsible person will see on the street. It's a worthy tradeoff unless you get a hardon posting dyno graphs all day.
Quite a few overlays between the two over on NASIOC that show spool differences and top end.
Frank
Quite a few overlays between the two over on NASIOC that show spool differences and top end.
Frank
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08-22-2009, 11:38 PM
#44
2 Props,3 Dildos,& 1 Cat
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I might be willing to swap housings if someone had the standard .86, but it's kinda gotta have the wastegate welded shut.
incidentally, what's Pauls 2560 A/R?
incidentally, what's Pauls 2560 A/R?
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08-23-2009, 08:08 AM
#47
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Remember the "GT2871R" also comes in 3 different compressor trims.
Anyone with one of my manifolds gets my price on TiAL stuff. At least for the foreseeable future. 
I did order a seperate .64 v-band turbine as part of the buy in.
EDIT: I really mean you pay retail/lowest allowable price and pay less for the manifold/downpipe...yeah.
Paul's 2560 is the standard .64, I think the only way the smaller gt25 turbine comes in.
I did order a seperate .64 v-band turbine as part of the buy in. EDIT: I really mean you pay retail/lowest allowable price and pay less for the manifold/downpipe...yeah.
Paul's 2560 is the standard .64, I think the only way the smaller gt25 turbine comes in.
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08-24-2009, 02:10 PM
#55
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At constant boost maybe, but what about flattening the torque curve by raising boost at higher levels? The bigger compressor wheel will keep the discharge air temperatures down (efficiency) and the added boost will help offset the higher flow turbine losses at higher RPMs. I plan on trying this myself. 225 ft*lb or so carried to as high an RPM as possible should be great. 225 ft*lbs @ 7000 RPM = 300 bhp. 225 ft*lbs @ 8000 RPM = 342 BHP (about 300 RWHP). Should be able to do this with a built motor from what I have seen.
There is no right answer here, just a matter of choosing one's compromise.
There is no right answer here, just a matter of choosing one's compromise.
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08-24-2009, 02:33 PM
#56
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At constant boost maybe, but what about flattening the torque curve by raising boost at higher levels? The bigger compressor wheel will keep the discharge air temperatures down (efficiency) and the added boost will help offset the higher flow turbine losses at higher RPMs. I plan on trying this myself. 225 ft*lb or so carried to as high an RPM as possible should be great. 225 ft*lbs @ 7000 RPM = 300 bhp. 225 ft*lbs @ 8000 RPM = 342 BHP (about 300 RWHP). Should be able to do this with a built motor from what I have seen.
There is no right answer here, just a matter of choosing one's compromise.
There is no right answer here, just a matter of choosing one's compromise.
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08-24-2009, 03:14 PM
#57
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I'm working on the intake right now; I'm removing VICS and opening up the plenum. The top half is done, and I am working on the bottom half now. Not as good as a full-up custom intake with a larger throttle but cheaper and easier.
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