SBC 302 is in, running!, Needs some tuning, any suggestions? |
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SBC 302 is in, running!, Needs some tuning, any suggestions? |
marks914 |
May 31 2007, 10:24 AM
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#1
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Senior Member Group: Members Posts: 845 Joined: 9-October 04 From: the motor city Member No.: 2,912 Region Association: None |
Got the 305 out and put the 302 in, runs pretty well.
I am running an edelbrock 600, Hydraulic roller cam .56 lift 236/236 duration. I am in the process of tuning it right now. I have HEI vacuum advance hooked up to the timed port on the carb. The engine has some lope to it, when I advance the distributor to smooth out the idle, it purrs like a kitten and no spark knock. The problem is when I advance the ignition timing this far, it is difficult for the starter to turn over the engine. Here is what I am going to try, please tell me if this makes sense: I was going to put the vacuum advance on the manifold vacuum port, thus giving more advance at idle, I do not think this would affect the initial start up advance, making the starter able to turn the motor over when hot. here are some pics Thanks Mark PS, the car is a bit quicker now, the power comes on at 3000 RPMs, so it is very driveable around town with the power where it needs to be. Attached image(s) |
andys |
May 31 2007, 01:17 PM
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#2
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None |
As greybeard50 mentions, and perhaps a bit more information regarding what you have. How much advance in the vacuum pot, and at what vacuum level? If you have a hand vacuum pump, you can read the level at which it advances and by how much with that dial-back timing light. Rick is correct, that cam may not have enough vacuum to pull it down. How much mechanical advance in the distributor, and at what rate?
Sometimes you get lucky and there's enough mechanical advance that when you set initial (I'd probably go more than 6*), the numbers work out. Been some years since I've done any SBC tuning, but that's what I recall. Andys |
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