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Old 07-23-2013, 08:21 PM
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Would cam maywork?

what would work well with this 2200 stall?

My motor now is a 355. 461 double hump heads. Torkii2 intake. Street/strip holley 750 vs(Not to big and doesn't bog, does pretty well), 10.1 compression flat tops, the cam now is 488/508 lift 303/313 duration advertised 112 lobe centers hydraulic flattapet, gm hei, longtubes. Just looking for more low end really. Any suggestions would be great. Keeping it around the 100-130 dollar range. Should be able to reuse lifters in it, not ever 2000 miles. Just hate how the cam doesnt come in till 3000+. Looking for something more low end friendly. I do not have specs on my valve springs, but the are not stock. With the one now it will pull straight to 6500 every time. No valve float. They are singles

Edit: Just realized my major typo in the title lol You guys get the point. My bad!

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Old 07-23-2013, 08:31 PM
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Also. May just keep cam and simply change intake. So opinions for that as well. Probably dual plane
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Old 07-23-2013, 08:47 PM
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try a 1 inch spacer or advance the cam 3-4º. The trouble with hydraulic cams is they are poor performers down low when they have long duration. use lots of initial spark advance,upgrade the hei to at least an external coil
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Old 07-23-2013, 09:36 PM
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It has a 2 inch spacer.(heater hose clearance) And the dizzy is timed as much initialy as it can without starting problems. And hm! That may work... And I want to go all msd. But budget problems . Highschool budget
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Old 07-23-2013, 09:37 PM
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You may run into a bit of trouble using iron heads, 10:1 SCR and advancing that cam. Advancing the cam will close the valves earlier and raise cylinder pressures. 10:1 is already pretty healthy for those old heads so I don't think you'd want to advance the cam.

If it were me, I'd drop to a 600 carb and/or give it some more gear. A looser converter wouldn't hurt either.
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Old 07-23-2013, 09:39 PM
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600 wouldnt work for me. Had 2 on it. Then Holley said I should of just started with the 750 to begin with. Oh, it has a 4.11. And turbo 400
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Old 07-23-2013, 09:39 PM
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Any guesses on possible power as is? May leave it as is. Its not slow by any means. It'll get up to 110 from 0 in a blink of an eye.
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Old 07-23-2013, 09:43 PM
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you should have 385 hp or better if properly tuned.I used an 850 4781 on my old 355 with a solid lifter cam.I really hate the big hydraulic flat tappets
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Old 07-23-2013, 09:46 PM
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The tune I have feels decent. Dont get me wrong. May chassis dyno it tomorrow. Or sometime very soon. Id be happy to see 300 at the wheel. Even if not i dont care lol And so do I. I want to go all Roller real bad. But BUDGET lol
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Old 07-23-2013, 09:48 PM
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The plug after a few 100 miles. Pretty satisfied here
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Old 07-24-2013, 07:03 AM
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That engine MAY be putting out about 320 HP at the crank. The carb is too big for a 355 on the street (calculates out to 568 cfm needed at 6500 rpm) and that is where your low end is going. Plus, if that 2" spacer is an open spacer you're killing more low end. Lose the spacer and use a 600 to 650 cfm carb and enjoy your new-found torque.
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Old 07-24-2013, 09:58 AM
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I would never reuse flat tappet lifters on a new cam, unless the cam only had a few hundred miles on it, and then it will still need to be broken in again. A cam with duration closer to 274-280 will really improve your bottom end response, and I'd also drop down under .500" lift. The setup you're running is designed for high rpm power, and it may be helped by advancing the cam a bit, but it's still way too much duration for great low end response.
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