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turbo flow chart

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Old May 11, 2013 | 02:38 AM
  #1  
gotian's Avatar
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From: Fort Myers, Fl.
turbo flow chart

Hey everyone I have been looking all over the web and the forum for a flow chart for the turbo i currently have and I have not been able to find any. Maybe you guys can help me. I currently have a t3/t4 50 trim from turbonetics and I figured someone else might be running with the same or similar turbo, if you guys possibly have the flow chart available or if you could point me in the direction of where I can find it that would be great. I want to run more boost off the turbo but not go crazy with it, right now im on 6 pounds cause im restricted by the wastegate spring. So I mainly want to know what this can handle and what is the most efficient boost range to go with.

Im planning on getting my rx7 to close to 400whp as possible (will be happy with 375+ anyways) So thats why I want to know.

Thanks in advance

oh and ive got a 87 turbo 2 with 3rd gen rotors and housings
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Old May 11, 2013 | 03:40 AM
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From: OZ/AU
Peak flow is about 48lb/min @ 2.5PR ie 22psig at sea level.

Peak flow at more reasonable 2.0PR ie 14psig at sea level is 44lb/min

On a credible accurate verifiable by real science dyno that turbo has a power ceiling of about 375BHP on a 12A/13B rotary engine, which through a manual transmission front engine rear drive car is roughly 311rwhp. Every man and his dog on this forum will say you can make 375rwhp from that airflow but you're all wrong.

Now getting there.. Setup the support systems (intercooler, air filter, exhaust, tune, fuel pump, injectors) to support the power level with some extra headroom and then slowly wind up your boost. I would personally use a 14psi spring in the external wastegate if it was me but during testing I would always slowly increase the boost 1psi at a time while checking AFRs engine sounds air temps etc etc.
Attached Thumbnails turbo flow chart-t04e-50.gif  
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Old May 13, 2013 | 02:12 AM
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thanks for the flow chart, maybe if i post my mods you might be able to help me get on the right track to the 375-400whp mark im looking for.

3 inch turbo back exhaust
adjustable fpr
Walbro 255 fuel pump
1600cc secondaries 760 primary
still on the top mount but i have a front mount ready to go in
3mm super seals on a rebuilt motor with third gen housings
and a microtech lt8
you already know what kind of turbo i have.
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