Mr.1984

Im going to bore my engine to .040 and install a new cam. I have a 84 crossfire what kind of part list am I looking at. what should the lift on the cam be?

rklessdriver

As for the parts list.

What is your budget?

On the cam.

Do you want to stay with a flat tappet hyd or would you consider a retro hyd roller?
Will

Mr.1984

flat tapped and about 250. another question is it possible to only get larger pushrods to create a larger lift insted of buying another cam, or will it create a problem. like say .150 or .250 longer rods?

bwiencek

Longer pushrods are only to set the proper geometry - you're not changing the actual lift - which is determined by the lobe on the cam - the pushrod merely sits on the lifter and transfers this motion to the rocker - which then the ratio of the rocker arm multiplies that amount of lift by using the simple lever of the rocker and transfers that to the valve. To get more lift you either need to change to a higher ratio rocker or change the profile of the lobe on the cam.

In addition - are you staying CFI or are you going to swap to a higher flowing intake setup (or even a carb?)

If you're staying with the crossfire injection then your cam should really maximize the low end torque as the intake doesn't flow enough to support a can that's going to make a lot of power in the mid to higher RPM range. Also you'll need to tune the computer to run properly with a different cam.

Need more info before we can really suggest any parts - or just do some searching around here for the cam that others have run with the crossfire setup.

Ray Quayle

I was going all over the place when I decided to do some work on mine, so I have some new in box unused parts you may be interested in if it looks like one would work in your application. I have a Comp Cams Kit (cam, lifters, springs, retainers, locks and timing set) K12-268-4. Lists at Summit for $355.95, I'll sell for $325 including USPS Priority shipping. I have a Crane 114132 cam and lifter set $225.95 at Summit, $200 including USPS Priority shipping. Both are mild flat tappet cams. If you decide to go retro roller, I have a new in box Crane 119821. $426.95 from Summit, $400 including USPS Priority shipping. Going the retro roller requires the expensive retro roller lifters though unless you to the magic block work, so I wouldn't suggest it.

LD85

The way I recall understanding it, your Cam lift should be determined by the max flow of your intake and heads, you want to pass or reach the max flow on the valve open and close

So in general as an example, if your heads flow 265cfm at .500 lift you will want to have a lift of .500 or slightly more than .500, maybe .525 etc.

Muffin

Your budget is only $250.00? Suggest you rethink the whole thing. Minimum machine work will cost more than that.

Mr.1984

Thank you all for your help.