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Topic Review (Newest First)
10-23-2012 12:44 AM
chevyrestore
Quote:
Originally Posted by oldbogie View Post
Actually the Root Cause of your problem could have been an impedance mismatch between the Procomp electronics in the distributor and the MSD coil. I know that Procomp advertises that this works with anybodys anything coils but that's likely to be more advertising than engineering. There is a good chance that the Procomp module would work happily with a Procomp coil. Or that putting the MSD module into the Procomp distributor would have solved the problem.

One of my big issues with the hot rod industry is the lack of genuine technical data 70% more power than brand X's coil is not really useful information. Our ignition module is impedance matched to a 50 ohm coil is useful engineering data.

Back in the good old days of modular stereo systems if you plugged 16 ohm speakers into a 8 ohm amplifer you could count on buying new speakers or amp, or both in the not to distant future. You've got a same/simular situation here between distributor module and coil another exists in the drivers for fuel injectors between high and low impedance injectors get this wrong and you will find youself buying a new computer or new injectors or both.

So whether this is a problem of Procomp being of less quality or whether it was caused by using their distributor module against an MSD coil remains an open question in my mind, a spare time experiment someday perhaps.

Bogie

I know this is a procomp being cheap problem because I tried 2 MSD coils, and 2 procomp coils, both procomp coils worked for a few months then gave out, also had 3 vacuum advance canisters go out and my truck never backfires and 1 distributor go out for bearing noise. From what ive gotten from procomp its all junk apparently.
10-22-2012 10:09 AM
oldbogie
Quote:
Originally Posted by chevyrestore View Post
Hey everyone, with all youre help I think its fixed, I replaced the coil and distributor with MSD parts and that fixed it so far...thanks for everyones help and hopefully this forum thread will help someone with the same issue
Actually the Root Cause of your problem could have been an impedance mismatch between the Procomp electronics in the distributor and the MSD coil. I know that Procomp advertises that this works with anybodys anything coils but that's likely to be more advertising than engineering. There is a good chance that the Procomp module would work happily with a Procomp coil. Or that putting the MSD module into the Procomp distributor would have solved the problem.

One of my big issues with the hot rod industry is the lack of genuine technical data 70% more power than brand X's coil is not really useful information. Our ignition module is impedance matched to a 50 ohm coil is useful engineering data.

Back in the good old days of modular stereo systems if you plugged 16 ohm speakers into a 8 ohm amplifer you could count on buying new speakers or amp, or both in the not to distant future. You've got a same/simular situation here between distributor module and coil another exists in the drivers for fuel injectors between high and low impedance injectors get this wrong and you will find youself buying a new computer or new injectors or both.

So whether this is a problem of Procomp being of less quality or whether it was caused by using their distributor module against an MSD coil remains an open question in my mind, a spare time experiment someday perhaps.

Bogie
10-21-2012 11:44 PM
cdminter59
Ignition coil overheating

Well, I hate to rub it in because I know everyone wants to save money anyway that is possible. When installing new parts especially high performance parts buy the known brands that work. If something is $100 cheaper for the same part warning signs should go off in your head! Buy the correct part once, use a coupon or another store that has a sale. I have saved alot of money buying name brand parts using coupons from the internet from stores such as StreetsideAuto.com, SummitRacing.com (No coupons lately). It pays to compare prices. Glad everything has worked out for you!
10-21-2012 09:41 PM
chevyrestore Hey everyone, with all youre help I think its fixed, I replaced the coil and distributor with MSD parts and that fixed it so far...thanks for everyones help and hopefully this forum thread will help someone with the same issue
09-28-2012 10:01 PM
cdminter59
Ignition coil overheating??

Yes, The MSD-8222 is all you will need. The instructions to wire it up should be in the box.
09-28-2012 07:17 PM
chevyrestore Thanks for the info, will the MSD-8222 be okay with the MSD distributor I ordered?
09-27-2012 10:29 PM
cdminter59
Ignition coil overheating

I think I read in your posts that you purchased the Blaster High Vibration MSD-8222. Just want to make sure you have a good coil for your new distributor. When installing your new distributor make sure it is grounded good and the battery lead is disconnected. Don't want you to burn up the module.
09-27-2012 09:30 PM
chevyrestore yeah MSD gave me the wrong number, I reordered the right one, thanks
09-27-2012 09:29 PM
cdminter59
Msd 8361

Quote:
Originally Posted by chevyrestore View Post
Just to eliminate this procomp crap I bought a few years back I bought an MSD 8361 distributor. The wiring directions only show it going to different types of controllers, can I wire this one directly to the coil or do I need the controller box as well?
That model requires an ignition box. Can you return it and get the MSD 8360? MSD Ignition 8360 - MSD Pro-Billet Ready-To-Run Distributors - Overview - SummitRacing.com
09-27-2012 05:28 PM
chevyrestore Just to eliminate this procomp crap I bought a few years back I bought an MSD 8361 distributor. The wiring directions only show it going to different types of controllers, can I wire this one directly to the coil or do I need the controller box as well?
09-24-2012 10:50 AM
cdminter59
Ignition coil overheating??

What is your timing curve? initial_____ mechanical_____. You want 36-38 total. This only leaves around 14*-16* for Vacuum advance. If your vacuum can is adding more you will have to buy an adjustable one. As for you not getting oil to the #5 rocker what we are saying is the lifter is not pumping oil up thru the push rod. Take the lifter apart to see if you have some trash in it or buy another lifter(same brand) and take the inside guts and install in your lifter body. This way you won't have to go thru a break-in process again. With your vacuum unhooked from your distributor is your idle high enough without using the curb idle screw on your carburetor? If it is okay you can use ported vacuum. If the idle is too low use manifold vacuum to raise the idle.
09-23-2012 11:47 PM
chevyrestore From what I have learned and read in the past everyone said to use manifold vacuum since I dont have any emission requirements. I was also told though that with certain misfire problems many people ran with ported vacuum which is why I was asking.

When its hooked up to manifold vacuum it definitely has a deeper more throaty sound because of the lack of advanced timing at idle. Has anyone else on here experienced switching from ported to manifold advance help with misfires under load?
09-23-2012 11:39 PM
cdminter59
Ignition coil overheating

Do a search on this website for Distributor Vacuum Advance Control units
Specs and facts for GM Distributors

by Lars Grimsrud
SVE Automotive Restoration
Musclecar, Collector & Exotic Auto Repair & Restoration
Broomfield, CO Rev. B 8-19-02 It may be easier to type this in the search block and go to post #9.
Port or Full time vacuum - Hot Rod Forum : Hotrodders Bulletin It will be the second thread.
09-23-2012 08:58 PM
chevyrestore when I get some time away from work im going to pull off the driver side valve cover this time and check out the travel on the rockers and readjust,

at this point based on your suggestions I may be leaning towards a distributor also if the driver side ends up checking out good.


Also on a side note, should I be running the vacuum advance on the driver side (manifold vacuum) or passenger side (ported vacuum)?
09-21-2012 06:08 PM
1971BB427
Quote:
Originally Posted by GMCTRUCKS View Post
Hey guys might it be a bad ground to the coil or ICM?
Grounding is very important to electronic ignition systems, so it could be that if the engine and system isn't properly grounded, but it usually wont be heat related. It should happen all the time if it was a ground issue.
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