joshuaho96

I can believe it if you're getting air into the pickup. Cavitation is tremendously destructive for pumps.

I took the liberty of downloading the pictures:

WTF is that engine bay. They didn't even mask off the brake master cylinder or reservoir before going at it?!

I think you pretty much nailed it.

Do you have a crank trigger or are you still running the factory CAS?

I think you're thinking of silicon, not silicone. Silicone is a polymer of siloxane which is Si-O-Si with some hydrocarbons hanging off of the silicon.

I would not trust whatever J Replace ignitor you bought personally, just searching them up on Zilvia their parts are basically complete shot in the dark alibaba crap: https://zilvia.net/f/showpost.php?p=6422907&postcount=15 This is a hard lesson to learn with these cars. Almost always these aftermarket parts are a false economy. I bet the power transistors are not able to keep up once they get hot enough which is not helping with your misfires. At least with the RB26 the OEM ignitor + Hitachi coils are so expensive now that it's not even worth it to bother with OEM much of the time, R35 coilpack conversions are the same price initially and then any replacement afterwards ends up cheaper because there is no separate ignitor, if one coil fails you replace that coil only. If there is oil in the intake and the PCV is not venting to the intake then pull apart the intake and verify the turbo is ok. Do not drive the car if the turbo has shaft play. It will shed metal and debris into the rest of the engine and make things go from bad to worse.

I'm actually really impressed that you don't pop a pressure relief valve or find some other weak link in the system. This puts me at ease though, I want to run 5 bar differential at the injectors and flow enough for maybe 500 crank horsepower tops on E85. I'm really hoping that a single Fuelab 496 series pump will work for this.

Most likely your engine is toast, but also the R32 GTR has different ratios than the GTS4. In 5th it's basically the same, it's mostly 1st through 3rd that change. Stop trying to do WOT pulls before you make the engine entirely unsalvageable. Do a leakdown test and/or borescope the cylinders first. And a boost leak can overspeed a turbo. Make sure the turbo actually functions as intended.

AFAIK didn't some of the race variants of the 32s do this relocation? Just relocate the fuel tank into the trunk.

Nissan thought about it, hence why the R33/R34 puts it behind the RH rear tire. I just don't think you can pull that same trick without a ton of work.

-9s aren't a bad idea if the goal is to make more power, they just have a much narrower compressor map than the -7s and probably whatever TD04HL thing the GTIII-SS is.

The interesting thing about the -9s though was the ceramic ball bearing, at least the 836026-5002S.

When I look up -9s these days some suppliers claim they're discontinued by Garrett. I don't know what the truth there really is.

Multimeter isn't going to be super helpful when a lot of these signals need to be probed dynamically. If you suspect it's a MAF try tapping or jiggling the harness connector while the car is idling to see if it stutters. Also, 1700 RPM cold start idle is super high. You can try ohming the ignitor when cold and then again when hot to see if heat is killing the module for some reason. Fuel pressure requires a tee after the fuel filter to measure with a gauge. My advice is get a Consult cable and you can monitor basically all the ECU I/O and also do some kind of sanity check of the ECU as well. If Consult logging craps out when the engine misfires then you should probably suspect the ECU. If you see weird TPS behavior, either not smoothly following real throttle position or dropping out then diagnose that further. If RPM doesn't make sense then suspect the CAS. If you want to test the CAS further you really need a timing light. If you suspect lean-out and not just a dead misfire under boost stop going into boost immediately until you can be confident the fuel system is trustworthy. You can easily kill the engine doing this.