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Posted: Sun May 30, 2004 11:56 am Post subject: Safe Boost Levels

What is a safe boost level when running a new, factory toyota head gasket?
I replaced my hg before installing the motor, and I have about 6k on it now. I finally got around to installing a boost gage this weeekend, and to my GREAT surprise, it consistently boosts to 10 psi, and so far the most I have seen is 14psi (third gear). This brings up a number of concerns for me, but the first is whether my head gasket will hold up to this abuse.
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Posted: Tue Sep 21, 2004 9:38 am Post subject:

are you running an intercooler? for the pic i don't see one it may not be such a good idea. do you have a exhaust temp gauge? ive been running mine around 14psi without any issues for 8months with a genuine toyota hg w/o intercooler. my safcII has a knock sensor reading that i sometimes watch
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Posted: Tue Sep 21, 2004 10:53 am Post subject:

My 4runner is torn apart right now, but I have half a duramax diesel IC core that I will make end tanks for and install so it should be fine. I will also have an upgraded turbo, 550cc injectors and ls400 housing. I'll keep the boost levels below 15 psi until I get a mhg, egt, and poss some fuel adjustability.
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