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Old 03-08-2012, 05:11 AM
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What is the difference in these cams?

I am in the process of helping a friend freshen up his 350. He has a 1983 Chevy K10 4X4, full rebuilt .030 over, flat tops, headers, edelbrock 600 carb, and edelbrock performer intake. I don't remember the cylindar heads, but they are not the smog heads that came on it. He has decided to go with a summit K1103 cam, 214\224 duration at .50 .442/.465 lift. We also found a Lunati 10001LK cam with the same specs, but for $10.00 more. Is there any difference in these cams except the price? If there is, what cam is the better one?

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Old 03-08-2012, 05:55 AM
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the summit cam comes with lifters.

I would say the cam is a little too big for a 350 in a heavy 4x4 truck with stock gears and stall. Plus the cam is a little too big for stock valve springs.

You need to determine what heads you have to figure out compression ratio. And check the heads to see how much lift they can take.

Hopefully the heads are 76cc chambers, then you can use a smaller cam.
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Old 03-08-2012, 07:55 AM
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they are basically the same cam, probably even cut on the same machines, as most all cams are not cut by the actuall cam company, they just put their names on it. there is nothing wrong with a summit cam.

i agree with 454C10, the very first thing that you need to worry about when playing with a 70-80's vehicle (especially truck) is getting a new set of gears for the front and the back, cause most of these trucks were sold with 3.08's as their stock gears. if you are running stock size tires then a 3.73 would be fine, but if you are running larger you will need to go larger.

i think the cam is fine for a 4x4 truck, i had a 87' blazer with a 383 that had a 224/230 .502/.510" hyd roller cam in it. and it still pulled great and was a blast in the mud on and on the beach.

i would however agree that you better hope that the heads that your buddy has picked aren't 64cc chamber heads as that will put you around 10.2-10.3:1 compression ratio, which will be far harder to get in tune to run pump gas. a set of 72cc chamber heads would be the route i would go, they would put you at around 9.3-9.4:1, and the 76cc chamber heads will put you around 9.0:1

and you will want check to see if the heads you guys are using can even handle .465" lift without getting into coil bind.
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