acceleration problem
Thread Starter
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Freshman User
Joined: Mar 2017
Posts: 45
Likes: 0
well folks it is fixed. I am not sure what part of what i did fixed it but its done. my vacuum advance hose had cracks on it so i replaced it. I messed with the timing by ear to get a smother idle as i was unable to see the markings on the damper pulley. Tighten the number 5 plug and seated the number 6 pug wire on to plug. so your guess is as good as mine as to what fixed it. I am sure it was a combination of things. Thank you all for your help and advice. This is a great forum. I will be posting what 360 build i will do. Is it true that the 360 block has deeper crank wells then the 390? so i could put a 428 crank in it.
Tuned
Joined: Apr 2017
Posts: 266
Likes: 7
No...Testers right. I did it too. It's not .40 that is almost a half an inch. we left the zeros out. .035 .040 etc
Thread Starter
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Freshman User
Joined: Mar 2017
Posts: 45
Likes: 0
OK thank you for the advice. I will pay attention when turning over.
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Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
One good old boy who does ignition stuff for a living sez that plug gap is a function of the head design and combustion chamber and shouldn't really be changed. A wide gap does mean the coil runs hotter and there is more potential for arcing or crossfire and rotors and cap wear out quicker. One thing to keep in mind too, once electronic ignition came into wide use they ditched the smaller distributor cap and increased the diameter, to keep the electrons going where they need to. If I recall Pertronix sez can open up .004" over points, or to .039" I don't think it matters much, and isn't a factor here in this particular problem.
Cargo Master
Joined: May 2015
Posts: 2,350
Likes: 7
From: Garland, Tx
LOL, hate to be a dick sometimes but decimals matter. I was just pointing that out.
One good old boy who does ignition stuff for a living sez that plug gap is a function of the head design and combustion chamber and shouldn't really be changed. A wide gap does mean the coil runs hotter and there is more potential for arcing or crossfire and rotors and cap wear out quicker. One thing to keep in mind too, once electronic ignition came into wide use they ditched the smaller distributor cap and increased the diameter, to keep the electrons going where they need to. If I recall Pertronix sez can open up .004" over points, or to .039" I don't think it matters much, and isn't a factor here in this particular problem.
One good old boy who does ignition stuff for a living sez that plug gap is a function of the head design and combustion chamber and shouldn't really be changed. A wide gap does mean the coil runs hotter and there is more potential for arcing or crossfire and rotors and cap wear out quicker. One thing to keep in mind too, once electronic ignition came into wide use they ditched the smaller distributor cap and increased the diameter, to keep the electrons going where they need to. If I recall Pertronix sez can open up .004" over points, or to .039" I don't think it matters much, and isn't a factor here in this particular problem.
I had not heard of the cross fire warning.
I an running a hotter coil and 8mm wires.
Cargo Master
Joined: May 2015
Posts: 2,350
Likes: 7
From: Garland, Tx
well folks it is fixed. I am not sure what part of what i did fixed it but its done. my vacuum advance hose had cracks on it so i replaced it. I messed with the timing by ear to get a smother idle as i was unable to see the markings on the damper pulley. Tighten the number 5 plug and seated the number 6 pug wire on to plug. so your guess is as good as mine as to what fixed it. I am sure it was a combination of things. Thank you all for your help and advice. This is a great forum. I will be posting what 360 build i will do. Is it true that the 360 block has deeper crank wells then the 390? so i could put a 428 crank in it.
