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Old 12-26-2004, 05:04 PM
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Camshaft Help

I've got a 50 Ford with a Chevy350/350 combo in it. The block casting # is 14093638. According to Mortec it is an 87 and up engine. I want to put a hotter cam in it . Most of the cams I looked at say 87 and earlier carburated engines. Is there a physical difference between earlier and later cams, or is it because they assume later engines will be fuel injected, or what? My motor has an edelbrock manifold and Holley 600 on it. I need to know if an earlier cam will work in my motor.

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Old 12-26-2004, 05:43 PM
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What is needed to know is rather or not the engine has a roller cam in it. and according to the info I get in my book, it says this engine came with both roller and flat tappet. so the next logical step would be to see which is has. You should be able to pull a push rod and check it`s lenth, if it`s shorter than the standard lenth push rod, then it`s a roller cam, if it`s standard, it`s flat tappet. However, since these engines came with both, you can swap to a roller cam. I`d find the roller tappets and other pieces you need in the junkyard, find 2 4.3 liter V6`s and use the tappets, pushrods, and lifter retainers, cam retainer then all you`ll need is the V8 spider which you can order. You`ll also need a timing chain for it.
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Old 12-26-2004, 06:02 PM
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Doublevision,
It's a flat tappet cam. There isn't a junkyard around here worth a darn. I tried to get a set of 15" steel ford wheels about 6 months ago and stuck out at every junkyard in town. I am just looking to go to Jegs and order a cam and lifters. Will the older cams work in the newer motors?
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Old 12-26-2004, 09:17 PM
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cams

What other mods have you made to the engine? Do you plan to make any serious mods? What kind of transmission? What rear end gears? If you have an automatic, are you willing to go with a higher stall torque converter? If you are wanting to stay with a basic stock engine, say with other than the cam, a 4 bbl and headers, then a cam in the neighborhood of 210-220 degrees is all you want, and run a 600 CFM carb, with vacuum secondaries.
If you are planning to stay with stock compression, go with a cam with 110-112 degrees of lobe separation.

The wider lobe separation will give you a wider torque curve, enhancing your all around driving qualities, as will a vacuum secondary carb. If you are planning to make a real firebreather out of it, then that takes a little more time and money.
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Old 12-27-2004, 05:40 AM
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Right now the engine has headers, an Edelbrock manifold, Mallory HEI distributor and a Holley 600 carb. The trans is a th350 thats going to get a shift kit. The rear gears are 4,11 posi's, although i should have a set of 3.55's showing up today. My current rear tires are a set of L78 WWW's,30.5 inches tall, but I also have a set of 28 inch tall cheaters on order for it. I don't really feel like messing with the trans too much right now, although if it needs a rebuild I will put in the higher stall convertor. I don't want a firebreather, I just drive it around town and to shows, but I wan't it to perform better than it does now. Do you have any reccomendations as to a specific cam?
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Old 12-27-2004, 06:01 AM
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Yes, the older cams work.
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Old 12-27-2004, 11:07 AM
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cam recommendations

I would seriously look at the Crane Powermax, or the Comp Cams X-treme Energy series cams. I would also stay between 200-220 degrees duration @ .050", on the intake side. These cams are a lot better at producing the lower end and midrange power you are looking for to pull your truck, and will work in better harmony with your intake, carburetion, and exhaust sytem you already have. Getting ove 230 degrees @ .050", you start getting into the high rpm cams and your bottom end power will start suffering.

Dont be mislead by cam rpm operating range ads. Just because a cam is rated at 1000-5000 rpm, doesnt mean that it wont produce huge amounts of power over that rpm range.
An example of this is factory cams. Typical factory standard performance cams (typical V-8's) are ground to operate in the range of 0-3500 rpm or so, yet if you look at typical dyno tests with these engines, particularly engine dyno tests vs chassis dynos, that often, these engines put out their peak HP at well above the factory rated RPM range for the cam.
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