Topic: Timing Question
in Forum: C3 Engines
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I have a question about setting up the timing on my vette. I just
installed a new intake, roller rocker arms, shimmed the end on the distributor for proper
end play, cleaned the weights and advance mechanism, and installed a
missing bushing on the advance pin.
Now I have the distributor back in the car and checking the timing. I am using a dial back timing light that has always been on the money. Now it is telling me I am idling at 30 degrees, if I rev the motor it goes off scale. My question is, could I be off one post with my wires making me see this kind of numbers? Any help would be greatly appreciated.
I have a few pics of the work I did that I want to submit to the do it yourself thread.
Eddie 70 38720.8303356481
Now I have the distributor back in the car and checking the timing. I am using a dial back timing light that has always been on the money. Now it is telling me I am idling at 30 degrees, if I rev the motor it goes off scale. My question is, could I be off one post with my wires making me see this kind of numbers? Any help would be greatly appreciated.
I have a few pics of the work I did that I want to submit to the do it yourself thread.
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Lifetime MemberModerator
Duncanville, TX - USA
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
I agree...with that much advance, it would be extremely hard to crank the engine over, and probably impossible when hot. That's too much actual(total) advance even at 3000rpm, much less at idle. Check which plug wire you're on. 
Joel Adams
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I am on plug one. I was just thinking I may have the wires one post off
on the cap. Would that give the readings I am seeing. The car fires
instantly and runs smooth.
Lifetime MemberHOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
That would do it! Are you getting 30 degrees with the vacuum advance plugged off I assume?
LukesVette 38722.3778356481
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Luke, you are correct. I was just trying to set it up for mechanical
advance of 36. Cool. My next move was going to be move the wires one
post and see if that would get me back in line. I was just wanting
someone to confirm with me. I will post back and let you know how
it goes. I pulled the distributor again tonight for a new bushing on
the advance pin again. The temp one I installed was plastic, I ordered
a new brass one. It arrived today. Should have it all installed
Saturday.
Got the new brass bushing installed and set the timing. I have 36
degrees centrifugal, all in by 3000 RPM. I have 18 at idle with no
vaccum attached. I did not check what the vaccum can would pull yet but
I think I am ok with the can I have. It is a B1 can and close to stock.
I will check it tomorrow and see where it advances me to.
I believe I am set. Tomorrow I am going to take it out for a spin and see just how it runs. Should be pretty good.
I believe I am set. Tomorrow I am going to take it out for a spin and see just how it runs. Should be pretty good.
in Forum: C3 Engines
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