I would look for a turbo compressor that can produce 45lbs/min of air at a pressure ratio between 2 and 2.25, and keep it on the island. To hit your mark of 330RWHP, we need 390 flywheel HP assuming a 20% drivetrain loss. Looking at the T04B-V trim compressor, you can get 250HP at 12lbs of boost, and as much as 330HP at 23lbs of boost, and remain in the peak effienciency island the entire time. At 18lbs of boost it's capable of about 330HP at the crankshaft, using the same assumptions above. The GT3571R would do the same at only 15lbs of boost, which is MUCH more reasonable. Not really perfectly realistic as it will be worse than that in the real world. It doesn't get into the best islands till about 20lbs of boost and event then it's only flowing 32lbs/min.that's enough for 290 crankshaft horsepower, assuming a peak output at 12.5:1 AFR and a 0.5 BSFC. If you Just Need a ball bearing turbocharger, then I would say the GT3071R is a very poor fit for what you plan.
#DOES APR TUNE MAKE TURBO SPOOL EARLIER SERIES#
If you're going for the Bell approach, then this turbo isn't exactly the way to go.Go for a T04E series compressor and lay the boost to it. If you use a standard Garret-style housing, a 4-bolt flange downpipe would be needed and I would HIGHLY reccomend a 2.5" turn down, expanding up to 3" diameter before the second turn to get under the car for either turbine housing. It will bolt directly to the exhaust manifold, If your stock nissan housing is machined to fit the larger exhaust wheel you can use the stock downpipe and wastegate actuator, and it does not interfere with the intake manifold or engine mounting. Just ask for "A t3/t4 turbo with a stage 3 exhaust wheel and a T04B V-trim compressor" when you call the turbo shop of your choice. The T3/T4 hybrid I mentioned above will run you about 550$ ballpark brand new. I'm talking in T-series turbos.I don't have a need for a ball-bearing super-duper turbo to make 400HP. I would appreciate your input specifically on the gt3071r don't see any info with l28et. I don't know I feel about a rebuilt turbo (balancing, seals etc.) He found this to be very laggy but I could just put a smaller compressor wheel since it needs one. t3/t4 my brothers old turbo needs a rebuild and new compressor wheel. gt3071r don't see much guys here with this turbo a friend has this and a kind get for a good price its turbine=.63ar compressor. Its a bit pricey but may be overkill for me. My power goals are 280-330hp 1/4 mile and the occasional street push.
#DOES APR TUNE MAKE TURBO SPOOL EARLIER UPGRADE#
I was running 5psi in the beginning of the summer and by the end of summer I was pushing the turbo out of breather 15-17psi. I want to upgrade the turbo and would appreciate some feedback. Last summer I got my project finished its a 71 l28et freshly built pretty much stock except bore over 1mm ,mild porting head/intake, ms2 fuel and spark.
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