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Re: 440 Timing Issue
[Re: cuda66318]
#2418468
12/14/17 01:53 PM
12/14/17 01:53 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Cuda I enjoyed your article.
Last edited by RapidRobert; 12/16/17 09:37 PM. Reason: its the right thing to do
live every 24 hour block of time like it's your last day on earth
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Re: 440 Timing Issue
[Re: crackedback]
#2418818
12/15/17 01:42 AM
12/15/17 01:42 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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set the initial with the "vacuum gauge method" then with that # in hand shorten the slots with the FBO $22 plate to get 36 (initial+mechanical) then toss the heavy spring with the elongated loop & sub in a mr gasket/MP/Transdapt light spring in its place for a start (keep the OE light spring) & mix/match from there staying just under the pinging point at WOT up thru the gears on your hottest/driest (most likely to ping) day then plug in the can to ported & adj it with a 3/32 allen wrench staying (same deal) just under the pinging point in everyday driving under varying RPM/load conditions. CCW slows its curve (amt at a given in hg) but not the total. Bottom line NO pining allowed & there is silent ping & peoples' hearing varies so give yourself a cushion. You want to get close to the line but never over it.
live every 24 hour block of time like it's your last day on earth
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Re: 440 Timing Issue
[Re: CYACOP]
#2418898
12/15/17 10:09 AM
12/15/17 10:09 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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on finalizing the ign with the "vac gauge method" do not T into the can, go strickly off manifold. As you twist the dist the idle speed will rise so keep reducing the idle speed back to your lowest/normal in gear RPM which is what it will be at stoplight to stoplight. then when the vac in hg is highest then go back till the in hg drops 1" of vacuum & reset the idle speed if needed then see if it will crank OK when hot & if it balks then drop the INITIAL not the vac (1) degree & repeat. You would only T into the can if you are going to tune on manifold as opposed to ported & I know that is what Don at FBO is into & some people swear by it. I have no exp with it so I cannot say if it is the way to go. I'm thinking there still might be another issue tho besides this.
live every 24 hour block of time like it's your last day on earth
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