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08-28-2021, 02:52 PM | #1 |
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Join Date: May 2013
Location: Post Falls, ID
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anyone wanna help me pick a cam?
Im building a 350 for my '68 C10. Nothing crazy, shootin' for good dependable motor.
Engine specs: Bore________4.06" (0.060" over) Stroke_______3.48" (stock) Quench _____.037" (±.003) Compression__9.25:1 (±) Speed Pro flat top pistons with 4 valve reliefs (-6cc) Heads are 76cc "493" castings with 1.94" valves that have been moderately ported ( I probably made them slower ) transmission will be Th400, not sure which torque converter it will have, but it will be mild. I will build a Quadra-Jet M4M for it and mount it on a factory high-rise cast iron manifold. I'm keeping the points ignition. The truck weighs 4100lbs, with me in it. I want to focus on dependability and drivability, but I defiantly want it to pull as strong as possible. Any Cam gurus here wanna help me out? Thanks, -Russ
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08-28-2021, 03:13 PM | #2 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
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Re: anyone wanna help me pick a cam?
I would suggest a Comp cams XE-262, if you are running a flat tappet hydraulic. I ran an XE-268 in my 383 (Edelbrock top). The cam had a hint of lope @ idle, & pulled from the bottom! That 383 was a 1/4 inch longer on stroke than the the 355, & you will hear it more in the shorter stroke engine. If not going loose on the converter, I think you will be happy with a slightly smaller camshaft. Longhorn
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
08-28-2021, 04:38 PM | #3 |
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Join Date: Sep 2014
Location: Wenatchee, Wa
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Re: anyone wanna help me pick a cam?
What rear gear are you running?
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08-28-2021, 04:52 PM | #4 |
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Location: Cherryville, NC
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Re: anyone wanna help me pick a cam?
Probably too far into this build...but I would have started with a roller cam Vortec engine and retain the stock heads....
Yo would get roller cam and lifters, one piece rear seal, better flowing heads, and a standard GM cam will work very well..... Just my 2 cents worth...
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08-28-2021, 06:01 PM | #5 | ||
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Location: Post Falls, ID
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Re: anyone wanna help me pick a cam?
Quote:
Lobe Separation: 110° Max Lift w/ 1.5RR: .462" / .469" Seems like a lot of cam for what I'm building 3.73:1 with 29" tall tires ... However I might regear at some point, maybe 4.42s. Just going to play it by ear. Quote:
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08-28-2021, 06:19 PM | #6 |
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Re: anyone wanna help me pick a cam?
If it were me I would go with the 268 for the lope etc but the 262 at the end of the day is the best choice between the 2.
The difference between the 3.73 and 3.42 (assuming that is what you meant) is not enough to warrant a gear change. |
08-28-2021, 09:30 PM | #7 |
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Location: Post Falls, ID
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Re: anyone wanna help me pick a cam?
Agreed. However, If I'm already in there installing a TrueTrac, a gear set won't be a whole bunch more money and is the same amount of work. That's for a later date .
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09-05-2021, 05:14 PM | #8 |
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Re: anyone wanna help me pick a cam?
My 283 has a cam with those same specs (but for having .422 on the intake lift). It's called a Melling MTC-1 and it lopes a bit when the motor is cold and is barely perceptible when warmed up. It moves right along too. (Especially in the mid-range, but 283's are like that by nature I think anyhow)
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