On cold days I run 26psi been doing it over a year.But when temps warm its 15 psi. Specs. is for 15 psi.I lucked out and have a European injection pump.She never quits full power till max boost.I will add a jeep liberty turbo,and intercooler soon.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt