droping a junkyard 350 into a 68 chevelle temporarily til my big block is done. the intake code says it's a 73 motor, but it has an HEI distributor in it from who-knows-where. do i have ignition wiring issues (burning, melting) with the power increase? i've heard horror stories of fried harnesses, etc, if no modifications or rewiring is done.
2006-11-23 03:50:41 · 5 answers · asked by anthony d 1 in Cars & Transportation ➔ Maintenance & Repairs
Pull the hei dist, out and put a older dist in and wire it up to your old harness. it will do until the bigblock is ready. You might want to upgrade to a hotter wiring harness before trying to run that big block.
2006-11-23 03:56:36 · answer #1 · answered by golden rider 6 · 0⤊ 1⤋
The HEI will work just fine. You have to make sure that you have a full 12 volts going to the positive terminal on the side of the distributor cap. The power wire going to a points and condenser type distributor was a resistance wire that supplied only 9 volts. This was done to keep from burning up the points and condenser. But you need full voltage to operate an HEI properly.
2006-11-23 05:40:23 · answer #2 · answered by Mr. Badwrench 6 · 0⤊ 0⤋
initial timing should be 12 degrees better, at idle, with the vacuum develop line bumped off and plugged. A golfing tee works large for this. do no longer attempt to change the initial timing with the engine operating above 1000 RPM, about seventy 5 RPM favourite. you assert you won't be able to bypass the distributor adequate. Did you eliminate the distributor those days? it really is attainable it became no longer put in contained in the impressive position. On or 2 tooth out of time. also in case you eliminate the distributor keep in mind that there's a shaft it truly is pushed off of the distributor that turns the oil pump. make sensible this shaft is engaged once you placed contained in the distributor or you gained't have oil rigidity. is this the unique distributor? you want to make sensible the develop mechanisms are operating wisely. eliminate the distributor cap, rotor, factors, and element plate. you'll locate 2 weights with some springs. make sure that those weights bypass. in the adventure that they stick eliminate the weights and is derived. sparkling them. Lube with a touch dielectric grease. Get your self a hand operated vacuum pump. connect it to the vacuum develop on the distributor. save on with about 15 inches of vacuum. Does the vacuum develop mechanism bypass then you save on with vacuum? If no longer the diaphragm might want to correctly be undesirable. you assert you do not get vacuum. you assert you've an oem carburetor. Is the vacuum line linked to a reliable vacuum source? Is the vacuum line in reliable subject. Does the engine have reliable vacuum? such as your hand-held vacuum pump linked to a vacuum source on the intake manifold initiate the engine. At idle the gage on the pump might want to study between 16 to 18 inches of vacuum at idle. decrease than 16 inches and also you've a vacuum leak. The exception might want to correctly be once you've an oem camshaft. those might want to provide a lot less vacuum at idle. See the link lower than. it would want to provide you with some additioal help.
2016-11-29 09:52:59 · answer #3 · answered by Anonymous · 0⤊ 0⤋
not a problem.. i put an hei in a 69 chevelle without a prob... if it burns up its bad 30 year old wireing not the hei
2006-11-23 03:57:52 · answer #4 · answered by Anonymous · 0⤊ 0⤋
a99blkdog is right, the more intense voltage is from the coil to the cap to the plugs so it should not torch your wiring if it's OK to start with. have fun, upgrade your brakes while you're at it.
2006-11-23 04:38:39 · answer #5 · answered by sterling m 6 · 0⤊ 0⤋