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post #1 of 10 (permalink) Old Oct 20th, 02, 02:34 PM Thread Starter
ntp
 
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I have a built 350. I just replaced my edlbrock carb(junk) with a 650 holly 4160. Also installed MSD 6AL and Coil, Also the HEI kit. Re- gaped the plugs for that hotter spark. Still running the stock HEI destributor. I am getting a very slight skip at about 1200 rpm. And the motor seems to stumble of the line. Ive been playing with the timing. Its the most responsive at about 19 deg. of initial adv. I smells like its running a bit fat at idle. But the plugs look great if anything a touch lean. I also just installed an electric fuel pump and reg. Running about 5 psi. Ive been scratching my head for a while on this. Looking for some advice. Thanks.
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post #2 of 10 (permalink) Old Oct 20th, 02, 07:05 PM
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How far did you open the plug gaps?

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post #3 of 10 (permalink) Old Oct 21st, 02, 11:52 AM Thread Starter
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I gapped them at 50
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post #4 of 10 (permalink) Old Oct 21st, 02, 01:08 PM
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.050?
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post #5 of 10 (permalink) Old Oct 21st, 02, 02:21 PM Thread Starter
ntp
 
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Does mean this is not the correct gap? In the MSD literature it says for a compression up to 10.5:1 gap .060-.050, 10.5:1 to 13:1 gap .050-.040 and over 13:1 gap .040-.030. I could be wrong but I think this is correct.
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post #6 of 10 (permalink) Old Oct 21st, 02, 02:37 PM Thread Starter
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oops, above 13:1 should be gapped .045-.035.
Before the MSD I was running .040-.042. Did I get a bit carried away with .050? I am still running the stock distributor, sholud I replace it with the MSD pro billet? I run both ac delco and autolite plugs. Is there any difference? What fuel pressure should I run on the street? THANKS!
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post #7 of 10 (permalink) Old Oct 22nd, 02, 09:53 AM
 
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From everything that I read with your combo (which is about the same as mine) you should be running 6PSI.
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post #8 of 10 (permalink) Old Oct 22nd, 02, 10:00 AM
 
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I forgot to ask why you thought the edelbrock carb was junk. I seem to always be tuning my holly 4160 and was thinking of changing to the edelbrock. Alot of people told me they have no problem with them.
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post #9 of 10 (permalink) Old Oct 22nd, 02, 12:09 PM Thread Starter
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I guess its just personal preference. Ive always had holleys and never had problems.The edlebrock I was always adusting and it never ran right. It loaded up in turns probubly because the float is hinged side to side. I also have a 4160 on my race car and it has been very reliable.I have freinds who have had very good luck with edlbrocks. Thanks for the info.
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post #10 of 10 (permalink) Old Oct 23rd, 02, 08:25 PM
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If the problem persists, try regapping the plugs to .045 and see if it makes any difference.

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