383Lt1 help

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Jun 16, 2007 | 07:09 PM

lt1mf

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From: Lebanon,MO

383Lt1 help

I have recently installed a 383 Lt1 in my Camaro.It has Scat 4340 forged steel crank,Scat 4340 h-beam rods,Speed-Pro forged flat-tops with 2 valve reliefs.The problem I am having is under hard acceleration the car smokes,I dont think it is coming out of the exhaust and Its blowing oil out of the valve cover breather tube hole and dipstick hole in block. Also car acts like it has a vacuum leak,It has a CC306 cam with1.6 roller rockers , power brakes work very little at low speeds and I am getting a MAP sensor code due to vacuum. Wondering if unadeqate breathing for crankcase cause too much pressure,has just factory pcv system no aftermarket breather.Approx comp. 11.75 to 1. Any help will be appreciated.

Jun 16, 2007 | 07:13 PM

hpmotorsports

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When your car is idling and you take the oil fill cap of is there blowby coming out

Jun 16, 2007 | 07:17 PM

lt1mf

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No,I have even run a crank case pressure test by drilling a hole in a oil cap and hooking up a vacuum/pressure gauge under hard acceleration only 1-2 psi.