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Old 10-30-2004, 04:19 AM
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Unhappy Stock 350 with bigger cam runs ****ty! help

I rebuilt a 2 bolt main 350, i had it cleaned, magna fluxed, and checked out by the same machinest i built my other 350 with. well i built her stock all except the cam, carb, and intake, which was a setup i used before. the cam has a durration of 224/224 lift of 465/465 rpm range of 2,200-5,200 (summit part # sum-k1104,
the carb is a 650 holley, and the intake is a edlebroke dual plane spaced setup. she'll start right up every time, but theres no power at all, when i rev it up and let the 4 barrels open gas spues out the top and it bogs.... i was sure it coulda been the powervalve or setup of the carb, but i put on my 750 holley to check and the problem still exists!!!!! im in need of advice, im thinking its got to be the cam.... but at the same time iv used this setup before...ALSO.... i just remembered the pistons aren't dished like my old setup, they're flat toped..... please help, thanks in advance.... Ian

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Old 10-30-2004, 07:11 AM
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It should run fine........that cam is not that wild. Are you sure that the cam is timed right?

Also, have you checked for vacuum leaks around the intale manifold etc?
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Old 10-30-2004, 08:02 AM
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Sounds like a problem with that carb so changing it should have solved the problem. I would look for a vacuum leak at idle and check your timing and plug wiring...you did install the cam gear correctly right...some of them have an adjustment.


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Last edited by tm454; 10-31-2004 at 10:12 AM.
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Old 11-01-2004, 10:55 AM
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Do you know what your static compression ratio is? If the cam is too big and your compression is low, it will be doggy.
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Old 11-02-2004, 10:10 AM
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I tried that same cam in an 8.5:1 motor (for about three days), and it was a slug below 3000 rpm. Cranking pressure was only 120 psi. I ended up using a Crower 210/216 @ .050 w/.444 lift - big improvement (also brought the cranking pressure up to 150 psi.).
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