Carb Timing Question, Backfiring... |
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Carb Timing Question, Backfiring... |
yarin |
May 18 2005, 05:09 PM
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#1
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
I'm trying to work on the timing on my car. I bought a Sears Induction Advance timing light and i'm going based on Pelican's tech articles. Basically the car backfires like crazy over 3k rpm at any decent load. I hooked up the light, i think i see the major 34deg mark on the fan.. is this the wide fan blade? Do I set the timing light to 27 degrees at 3k rpm and line up the large fan blade with the mark on the housing?
Anyhow, i changed the timing around a bit and it still backfires like crazy out the exhaust. It also huffs on the intake side here and there. I don't have any electronics to set the dwell. This problem came up after two autocrosses. Any ideas? Fresh plugs, cap, rotor and wires already done. This is my first time really getting into carbs so pardon my ignorance but I can't seem to find the "vacuum advance line"? Where would it come from and where should it connect to? Thanks! |
scotty914 |
May 18 2005, 05:52 PM
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#2
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suby torque rules Group: Members Posts: 1,525 Joined: 20-July 03 From: maryland, the land of 25 year Member No.: 924 |
and with an advance timing light you can use it 2 ways, one set to zero and time it to the 27 degree mark at 3 k
or set it to 27 and time it to the tdc mark at 3 k but how i would do it ( i think the easy way ) would be to set the light to 8 degrees and set the timing at idle, then set the light to 27 degrees and check the tdc mark at 3 k, if it is off figure which way and reset the idle by that amount... if it is too adavnced set the idle at 6 and retest at 3 k or if too retarded set the idle at 10 and retest at 3 k but make sure you dwell is right even if you have replaced the point with some thing electronic as for carbs (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) |
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