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Old 04-22-2008, 03:05 PM
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Intake and Exhaust Help

I have a 350 chevy that I am trying to beef up. I just bought a COMP Cams 12-212-2. Hydraulic Flat Tappet, Advertised Duration 280/280, Lift .480/.480. Right i have the stock intake and exhaust manifolds. What would be some good headers, intake manifold, and carburetor for this setup? The car has 4:11's in the rear end if that makes a difference.
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Old 04-22-2008, 03:12 PM
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It also has vortec heads.
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Old 04-22-2008, 03:26 PM
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So, is this a "280 Magnum"?

Pat
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Old 04-22-2008, 03:28 PM
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With a similar cam I used the Weiand stealth intake, holley 670 Street Avenger and some long tube headers. You need a intake that will work with the RPM range of the cam and a carb that wont run out of breath when you get up in the R's, like if you plan on regularly runnin up to 6k dont put a 500cfm carb on it, but if you dont plan on takin it up in the R's all the time dont put a 750 double pumper on it. Youll just waste gas. a 600-650cfm Holley should work well for all around use.
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Old 04-22-2008, 04:30 PM
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Well, it will be in the 2000-5000 RPM range for most of its life. Rarely ever seening over 5000. So I will probably go with a 600cfm.
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Old 04-22-2008, 10:07 PM
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Smart choice on the 600 cfm.. .or a Qjet.

Intake I would use an Edelbrock Performer. Another viable option would be to use the GMPP intake that is commonly found on vortec crate motors. It can usually be found for cheap on Ebay because people buy the crate engines and then modify them a little. I picked one up for my boat for $70 brand new. For headers I would use small tube, full length primaries. Don't go nuts with 1-7/8" primaries; keep them smallish, like 1-5/8" with a 2.5" collector or close to it. Then you can run 2.25" duals.

You're pretty much in the ballpark, but the cam is a little hefty for your proposed RPM range. That cam will be good to 6000+ rpm and it won't wake up until 3500. I might suggest a more mild cam if it won't see more than 5000, like maybe an extreme energy 264 grind.
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Old 04-23-2008, 02:12 PM
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Well the only reason I picked that cam was because I like the street power, but I also love to go to the local drag strip and put the balls to it. So it will be seeing 6000+ RPM's, but it will only be a few days a month. Do you think I can use the QJet that came with the engine? It already has 2.25" duals running out the back. They are just hooked up to the stock manifolds.
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Old 04-23-2008, 06:27 PM
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intake and exhaust

why dont you go with the smaller cam and go to a different rocker ratio wouldnt it be tricking the cam into thinking its bigger
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Old 04-28-2008, 03:11 PM
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Where could I find Headers? The car is a 1977 Olds Delta 88 Coupe. Does anyone know what body style it is?I think it is a B body, but i am not sure.
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Old 04-29-2008, 06:58 PM
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The cam is now in. But I think I messed up. The marks that I made on the block got worn off somehow, and I have no idea what position the camshaft is supposed to be in. What do i do?
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Old 04-29-2008, 09:34 PM
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Quote:
The cam is now in. But I think I messed up. The marks that I made on the block got worn off somehow, and I have no idea what position the camshaft is supposed to be in. What do i do?
Oh boy. I suggest you buy a book first, something, anything, before attempting to do anything further. If you don't ask the question, it won't get answered, and I'd hazard a guess you missed a few asking a few things. At least then, you could refer to a pic, or section for some important steps and their sequence, not to mention getting some basic info.
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Old 04-29-2008, 10:36 PM
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Originally Posted by Stroke
Oh boy. I suggest you buy a book first, something, anything, before attempting to do anything further. If you don't ask the question, it won't get answered, and I'd hazard a guess you missed a few asking a few things. At least then, you could refer to a pic, or section for some important steps and their sequence, not to mention getting some basic info.
Thanks Stroke
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Old 04-30-2008, 01:40 PM
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Well thanks guys, you have been alot of help. And since I am 15, and this is the first engine I have really torn into by myself, I need all the help I can get.
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