Pinging

69signetv8 said
In the past I have always had trouble timing the engine with a light and end up doing it by a vacume gauge and ear! If I use a light and try for a factory setting about 8/10* before the engine will die. I have a true TDC. When I use a vacume gauge and adjust the dist to get max vac she idles well and the performace seems good but pings bad. I've tried a few things as advancing or retarding the timing but she still pings. I use + gas 89 octine.

Although I've read other posts I'm not up on the "total" timing thing and not sure how to tweak outside from moving the dist back and forth!

Sould I start playing with the screw in the vacume can?? If so which way do I turn it and how much??

This is the stuff I hate:shaking:..Wish you were here!
Thanks

Jimmy:

Tweeking your vacuum canister won't help rid the ping.

Sounds to me your total timing, (excluding vacuum advance), is not enough and coming in to soon.

Your engine will run best at around 34* total @ around 2800 rpm. If it pings with your engine combo at this setting, then you dist needs to be recurved so your total timing doesn't come in so fast. I'll bet that your total timing is all in by around 1800 rpm.

Send your dist to Dave at FBO in Calgary. For about $100.00, you'll be glad you did. Once on his machine, he'll set the vac also. You should be able to run 15* initial and 19* mechanical= 34* total at 2800 rpm.

Don't run your engine if it's pinging that bad. You need buy or borrow a good timing light.

Keep us posted.

Jim

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