Hey guys, My car has recently started cutting out, 200-300 RPMs, every few seconds running down the highway. I can drive it to the track 10 miles, make 3-4 pass and on my way home it starts cutting out. I have change my battery cables, check the MSD box and wiring and cannot find anything. I have ruled out fuel pressure as it stays steady. Any ideas? I am using an HEI dist converted to trigger a MSD 6AL box. Thanks,
hey, let me know how thar HEI dist converter works. I was thinking about getting one and converting my points to HEI so dont have to but a new dist seeing how my HEI is damaged I think
The HEI conversion is only about 8 bucks and has worked great triggering my MSD box. I am not sure what is going on w/ my ignition but I am pretty sure it is not the because of the conversion kit. Good luck.
Could the coil be dropping it charge! What type of coil are you using. I had an old tower style that had a crack down the side of the tower and would ground out giving the same symptoms.
Phil, I am still running the coil in the cap and forget the brand. I guess it could be overheating and dropping voltage. I will try a new this weekend at the track. Still trying to get this car flying... Thanks,
Yikes... Lose that coil in the cap, and I think your gonna be happy.. I never ran that on the run stand or the dyno.. we used external coils.. always.. Your motor is way beyond that E-coil.. JW
Jim, Thanks, I know that I need to move to an external coil. Funny thing with my distributor is that the advance plate moves but doesn't add any advance. I reset it to 34 degrees and WOW it really woke up. I think it might be time for a new MSD distributor. Thanks,
Wouldn't hurt.. And I bet it woke up.. I did weld that plate up so it had not much movement, your combo wanted a lot of inital to maintain idle quality with that cam.. You'll get there..
"Yikes... Lose that coil in the cap, and I think your gonna be happy.. I never ran that on the run stand or the dyno.. we used external coils.. always.. Your motor is way beyond that E-coil.." So what you are saying is that an external coil is better than an HEI? I have both and was planning on using the HEI on my just rebuilt 455 because I though it would be less hassel and more reliable with a longer spark, or to use the points distrubiter and convert it to a moderen electric dist with the 1 wire feed conversion kit summit sells and still maintain the external coil.. What should I do? Which is best recommened? I want to start this motor up n brake it in soon and im just waiting to finish the carb and decide on a dist. Thanks~Vinny
Vinny, I would say that for most street motors the HEI w/ internal coil would be okay. If you want, you can get an adapter from MSD that allows you to use an external coil w/ an HEI. I would use the HEI over the converted points dist. Good luck,
I guess it may work... Til you're on the side of the road wanting a lift. Not that reliable with that old design. Go to Buickstreet.com, and look for the ignitionman.
Thanks guys:TU: I think Im gonna go with the HEI to be sefe, I dont know theirs just something about HEI that I like. Also, whats the best gap fo rthe plugs? Im gonaa break the motor in in about a week, this is my set up... '74 block 10:1 hyperutectict pistons and new rings '70 heads just cleaned up and new valves and valve job '70 intake postons 113a cam 510 intake and 490 exhaust '74 rockchester 800cfm carb automatic 4 now and gonna try to get these headders to fit o No: Thanks ~Vinny
