I donnot think it has to do with compression .. I have run these motors at over 9 to 1 and 15# boost should be no problem
Im sure you have direct scan ... sent me a file to
evtb@cox.net
sounds more to me like your taking on oil in the intake tract somewhere ... be it pcv valve or turbo itself
send me that file and I'll be able to tell more
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85ttype 87 powered (resting) , 78 elcamino turblo bruick powered
Eastern Virginia Turbo Buicks
From Stock To Stage All Types of Buick Repairs Or Mods
business is closed ... relocating to jax. florida soon