[low77ride]

I have a stock 350 with headers im planning on putting a cam and intake on it this weekend. The 350 is in a 1980 camaro z28 with 3:23 posi and stock stall.

Comp Cams High energy 268H Adv.& Dur. 268 Dur @ 0.050 - 218 intake and exhaust. Lift .454, and a edelbrock rpm performer air gap intake intake manifold (1500 - 6500 rpm).

Will i have to change stock valve springs to use this cam up to 5000 rpm, which is my redline.? Thanks

Lane

[machine shop tom]

Stock springs will work ok with that cam, provided they are up to pressure and are set up at the right installed height. The RPM Air-Gap is too much intake for your set-up. You would be better off with the Performer.

[low77ride]

which intake do i need non egr or with egr ? And what does that stand for also ?

[DoubleVision]

EGR means Exhaust Gas Recirculation. This is a emission device that has little to no impact on performance, all it does is place a measured amount of exhaust gas back into the incoming air fuel mixture, since they can`t be burned twice, it reduces emissions and cools the combustion chambers by a considerable amount. if you plan on using the comp cam, you won`t need a EGR, as it has what we call a built in EGR. You`ll also want to add a double roller timing chain when you add the cam, the stock one is likely shot and I wouldn`t reuse it even if I replaced it, stock jobs don`t last long with a heavy foot. I agree with tom on the intake, The performer would serve you nicely and it accepts both square bore and spread bore pattern carbs, if your running a Quadrajet carb I would stick with it. As for the valve springs, If the springs have excessive mileage on them I would replace them, as you can loose a lot of mid range power if the springs are tired.

[Dubz]

just so you know the cams arn't warrantied unless you change the valve springs when you install the cam

[low77ride]

What kind of HP increase will i have with this cam over stock ?

[badknuckles]

stock that motor only put out 175 so i wouldn't be surprised to see you hit 220-230 hp.
that isn't the stock ring and pinion in that car right?

[low77ride]

All stock drivetrain.