Nismo 1.5 way Stub axle issue
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By Dose Pipe Sutututu · Posted
You might need an experienced turbo builder to machine a turbine housing to suit the Garret G30 turbine profile. I'm assuming you're in the US, maybe hit up ATP? -
That’s what I’m noticing… seems like a popular size is 0.82 A/R, I’m considering this: T3 twinscroll .82AR, but I’m unsure what brand because I’m not seeing Garett having the option.
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By joshuaho96 · Posted
I forgot we're talking about an R34. So probably not the R33 dreaded tachometer failure. It might be related then. You might need an oscilloscope to diagnose this stuff unfortunately. Scope the tachometer signal and see what it looks like vs a clean normal tach signal, check grounds, etc. Constant +12V to the fuel pump is always going to cause high fuel pressure at idle. The OEM setup uses the FPCM to slow down the pump to hit 3 bar at idle. Your tuner likely worked around this by adjusting fueling around idle and low load but it's very fragile as you are discovering. Any weirdness will cause running issues. Air can get into the fuel rail, either because of a leak or because of fuel boiling from heat. Hopefully neither though. Injectors pulsing + pressure building at the pump + fuel return will purge all of this. My experience is this is primarily an issue if your fuel system doesn't hold pressure + you're getting the fuel extremely hot from a warm restart and an engine bay that traps too much heat. A stock fuel system has all of this already engineered out. -
By Dose Pipe Sutututu · Posted
Which brand turbine housing are you getting? Garrett seem to have dropped focus on anything twin scroll as of late. They only have it in T4 1.06.
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