MakeitQuick92RS

iTrader: (1)

Hey everyone I am swapping in a small block from an older GMC 1500 truck (1986-1990 I think). I plan on using the stock heads for now with comp magnum roller rockers, I am also going to build it TPI not Carb, as gas would last longer on a fuel injected car. Now my question is what cam would you guys reccomend? I found a kit on summit by Comp for $309 that includes a magnum hydraulic cam, double roller chain, lifters, springs, and retainers. the duration at .050 is 218/218. They also have the same kit but with a bigger cam I think the duration at .050 for that one is 230/230. What would you guys go with, and how do I know if this engine has a hydraulic cam in it now? Can I put a hydraulic cam on engine that did not come with one factory? All your help is appreciated.

five7kid

iTrader: (14)

The Magnum wouldn't be a good choice with TPI. You'd be better off with an XE type with more LSA. Comp makes a computer-compatible line, as does Crane - much better choice.

The truck engine heads are going to be pretty poor. Find some 083, or even 081, heads, they'd perform much better.

ljnowell

I run a magnum cam in my car, its a 280H, to be exact. Its a whole lotta more cam than TPI would like. But it does have a healthy lope to it.

MakeitQuick92RS

iTrader: (1)

Can I put a hydraulic cam in a car that was not originaly equiped with one?

ljnowell

Sure you can, but you have to match lifers to cam, and make sure the block has the provisions. If the engine originally cam with a solid lift flat tappet, you can directly swap in a hydraulic. same with a roller block, you can. But for a roller, unless retro, it takes a little more work.