Im still new at this and trying to learn about camshafts, with duration and lift, and all that. I have a few questions though.

What does camshaft have to do with vacuum pressure, with the brakes and everything. Does this apply to all FI engines and Carbureted engine also?

Also what would you have to do to the 350 TPI engine to get it to accept a slight, but noticeable lope cam?

I was looking for a cam to go in the 88 camaro 305 TPI engine. I wanted a slight, but noticeable lope. Any suggestions? Thanks

 

The larger the cam, in general, the less vacuum it will have at idle; and therefore the less assist the brakes will get. FI or carb makes no difference.

TPI is rather particular about cams. It's REAL eeeezie to make it go slower than stock by picking an inappropriate cam. About THE FIRST thing that you MUST NOT do, is pick one that lopes; that pretty much GUARANTEES slower than stock. The cam characteristics that create lope, are DIRECTLY OPPOSITE what TPI wants.

I'd suggest the Comp "502" grind 08-502-8 for an otherwise stock TPI 350 motor.

You WILL need to upgrade the valve springs. There is absolutely no way that even brand-new stock ones will control the valves with a good aftermarket cam; and old wore-out ones are 100% CERTAIN to allow valve float (where they bounce off the seat instead of closing).