383 stroker pinging ?
Thread Starter
4th Gear
Joined: Feb 2007
Posts: 4
Likes: 0
From: hanover pa
383 stroker pinging ?
tried several things want to run on pump gas have pentroixn distbor also elderbrock performer heads compression 10.1 adjusted timing to 4 degree btdc medium size spings in distbuor.
NCM Grand Opening Veteran
Joined: Sep 2005
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From: South of giving a damn
St. Jude Donor '11, '17
Racer
Joined: May 2005
Posts: 470
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From: Amelia Ohio
You want to look at your total timing, shouldn't be more than 36* at 2500 r's. I also have the pertronix flame thrower and was having trouble with a ping, you will probably need to adjusted your vacuum adv. canistor it was my problem.
Chris
Chris
Le Mans Master
Joined: Apr 2004
Posts: 7,106
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From: Newark DE
initial timing setting is telling us nothing.
with the vacuum advance unit disconnected and the vaccum hose plugged what is the timing at when it's all in and at what rpm is the timing all in at?
you should be in the range of around 34º-38º total timing with it all in somewhere between 2800-3000rpm. (some people like to bring it in as soon as 2500rpm)
with the vacuum advance unit disconnected and the vaccum hose plugged what is the timing at when it's all in and at what rpm is the timing all in at?
you should be in the range of around 34º-38º total timing with it all in somewhere between 2800-3000rpm. (some people like to bring it in as soon as 2500rpm)
Thread Starter
4th Gear
Joined: Feb 2007
Posts: 4
Likes: 0
From: hanover pa
thanks for your help i have already adjusted vacuum advance but i go any farther i lose power. I not sure of my total timing will have to check that as soon as i get my car out. It runs good when i mix fuel but get to be a problem when going on long trip with my corvette club.
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Melting Slicks
Joined: Jul 2004
Posts: 3,296
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From: Avon, Indiana
Sounds like the problem I had. It would only ping after I'd been driving
30 minutes or so, and going up a hill it was definitely more noticeable.
In my case the vacuum line from the EGR was hooked up to the wrong
**** on the thermal vacuum switch.If working properly, the EGR cools things down.
Another thing to look at is whether the doors in the horns of your air cleaner are working properly.When you start up, hot air is pumped in through that foil hose on the left side. The doors stay closed initially, but then should open up. The hoses from the horns work off a vaccum, which is controlled by a temp switch.
If you go to autozone.com and type in your vehicle type, you can find diagrams and explanations of these systems.
30 minutes or so, and going up a hill it was definitely more noticeable.
In my case the vacuum line from the EGR was hooked up to the wrong
**** on the thermal vacuum switch.If working properly, the EGR cools things down.
Another thing to look at is whether the doors in the horns of your air cleaner are working properly.When you start up, hot air is pumped in through that foil hose on the left side. The doors stay closed initially, but then should open up. The hoses from the horns work off a vaccum, which is controlled by a temp switch.
If you go to autozone.com and type in your vehicle type, you can find diagrams and explanations of these systems.
