Re: Pocket porting
Pocket porting will not accomplish much on the LT5. The ports are beautifully shaped in the area from the valve seat and back an inch or so. Porting in that area is probably good for only about five hp. The porting gold mine on the LT5 is the intake port volume. Going from the OE 33 mm diameter to 36 mm from the valve guide to the plenum will add 60 hp or more on a 90 ? 92 350 ci engine.
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