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My near-stock 1JZ does not hold the selected boost level at high RPM. I set my MBC for approx. 13-14psi in 4th gear, but as I hit 5000+ RPM the boost drops by 1 to 1.5 psi. Is this normal? This happens in 3rd gear also. I pressure tested my intercooler system and pipes but realize I could have...

Situation: Just installed MBC this weekend. Installed fresh set of NGK 6097's gapped at .028. The car misses badly as soon as she hits 11-12 psi, but only when the outside temp is in the 90s, as it is today. This morning, when the car had only been running a few minutes and the outside temp...

I already posted this in the "Introduction" section, before I realized that there was a dyno/racing section. For what its worth, here is my virtually stock 1JZ dyno sheet: 1JZGTE, stock twins (mine came from an auto Soarer) 3" exhaust with Hi-Flow cat stock downpipe (ugh) Intake 19x12 FMIC no...

I usually post over at cs.com, but definitely wanted to say hello. Hi All, My '85 has a 1JZGTE (from a Soarer). Stock twins. In fact, she's stock aside from 3" exhaust with hi-flow cat. 19x12 FMIC. I don't even have a 3" DP or EBC - yet. She put down 268whp last Fall when I first got it...