It's running mostly good...
Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
It's running mostly good...
I have the timing at 11 initial and 36 total. No vac advance, 70 jets in a holley 750 dual feed. It isn't blowing smoke or backfiring any more. But, when idling after reving it I makes this thumping sound. Is it a mis? All new plugs and wires and it runs smooth.
http://24.131.143.29/running.avi
You can hear it at the end of the vid as a pop pop type noise.
http://24.131.143.29/running.avi
You can hear it at the end of the vid as a pop pop type noise.
Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
I just took it out, it was running good, then when I was pulling back in to come home it started backfiring out of the exhaust. Not sure what the deal is now. I need to get somebody over here that knows more than me. 
EDIT: I let it cool off for a while and started it up. Checked the timing and everything was fine and it ran fine like it did before. Is having my timing come all in at 2500 to soon or something.
EDIT: I let it cool off for a while and started it up. Checked the timing and everything was fine and it ran fine like it did before. Is having my timing come all in at 2500 to soon or something.
Last edited by JustinD; Jul 27, 2007 at 05:23 PM.
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
just curious..... why no vacuum advance hooked up?
There are definite advantages to using the vacuum advance system - typically better idle charaterics, better throttle response, lower operating temps, and better fuel economy.
There are definite advantages to using the vacuum advance system - typically better idle charaterics, better throttle response, lower operating temps, and better fuel economy.
Safety Car
Joined: Oct 2000
Posts: 3,593
Likes: 103
From: Southern Indiana
Its set right don't touch it, move on to something else.
Example: trickle you some water down the carb at fast idle so it doesn't quit, this will clean the carbon off the pistons.
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
what, you think car companies put on the vacuum advance system just because they wanted to add extra parts to the car for nothing? If you really understood how the vacuum advance system works and why it's there you would better understand the benefits to it and not argue against it everytime someone brings up the subject.
Just because you choose to not use it don't tell people it's not needed or has no usefulness because by doing so you are doing nothing but spreading incorrect information.
Tech Contributor
Joined: Jun 2004
Posts: 20,864
Likes: 960
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Thank you, Barry. I spent 24 years at a major domestic automaker, specializing in ignition and ECM design. It drives me nuts seeing the sheer silliness expressed at times in this forum. I no longer have the energy or interest in correcting these guys anymore. I appreciate your efforts to, as a wise man said, "push back the frontiers of ignorance". Keep up the good work.
Safety Car
Joined: Oct 2000
Posts: 3,593
Likes: 103
From: Southern Indiana
just because YOU choose to run with the vacuum advance not hooked up doesn't mean there are not advantages to it, whether or not you wish to recognize them.
what, you think car companies put on the vacuum advance system just because they wanted to add extra parts to the car for nothing? If you really understood how the vacuum advance system works and why it's there you would better understand the benefits to it and not argue against it everytime someone brings up the subject.
Just because you choose to not use it don't tell people it's not needed or has no usefulness because by doing so you are doing nothing but spreading incorrect information.
what, you think car companies put on the vacuum advance system just because they wanted to add extra parts to the car for nothing? If you really understood how the vacuum advance system works and why it's there you would better understand the benefits to it and not argue against it everytime someone brings up the subject.
Just because you choose to not use it don't tell people it's not needed or has no usefulness because by doing so you are doing nothing but spreading incorrect information.
And im not spreading incorrect info, you just want to hear it incorrectly!
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Joined: Jul 2005
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