timing my 304 - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 12-30-2000, 04:51 PM
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timing my 304

i have a cj with a 304 and it has some spark nock so i need to reset the timing what degree do i set it at. i have herd 8 degrees berfore tdc and have herd 12 before tdc. also what should i gap my plugs at. i have the tr upgrade. with the the tfi coil. thanks

80 cj7 304, WC t-5
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post #2 of (permalink) Old 12-30-2000, 07:53 PM
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Re: timing my 304

In most cases, the two timing degrees you have should work. Adjust the timing somewhere between the 8 & 12 degrees BTDC....wherever it seems to run best between those two marks. Advance the timing as much as you can between the 8 & 12 marks so that you don't experience any engine knock or pining. In a lot of instances, the type of transmission and what sort of emission equipment you have installed will cause discrepencies on what the true timing should be set at, but between 8 & 12 should work in the majority of cases.

Sorry, not sure what the gap on your plugs should be, although I know it has been discussed on this board in the past.


post #3 of (permalink) Old 12-31-2000, 03:15 PM
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Re: timing my 304

I'll add my .02 (may not be worth that much) I also have a 304 and TR/TFI upgrade. I have my timing at about 14-16 degress BTDC and no knock, at least as far as I can tell. Though my hear for such things may not be that great. I gapped my plugs at .040 though I believe, others have said that you can go up to .045-.050, maybe. HTH. Regards,

79cj7frame,ready to be built
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