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Old 04-07-2004, 03:03 PM
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Intake and cam

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

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Old 04-07-2004, 03:28 PM
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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.
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Old 04-07-2004, 03:40 PM
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which intake do i need non egr or with egr ? And what does that stand for also ?
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Old 04-08-2004, 01:47 AM
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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.
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Old 04-08-2004, 02:02 AM
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just so you know the cams arn't warrantied unless you change the valve springs when you install the cam
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Old 04-09-2004, 06:22 PM
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What kind of HP increase will i have with this cam over stock ?
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Old 04-09-2004, 06:24 PM
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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?
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Old 04-09-2004, 07:08 PM
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All stock drivetrain.
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