'66 Malibu N/SA

Mark Yacavone · 07-28-2015, 01:12 PM

Only problem I ever had was where the coil wire passed through.If the grommet wasn't big enough, the wire would blacken at the firewall, like the voltage was leaking to ground.
I've had problems with coils overheating and slowing the car down, but not be readily discernible .
On a Chevy or Pontiac with rear distributor, I like the coil to be inside and away from the heat from the engine, converter, and headers.
On a front distributor like a Buick ,I was afraid the coil wire would be too long and hard to keep isolated, so I would mount the coil right up front where it will catch air from the fan or grill.

HandOverFist · 07-28-2015, 01:27 PM

Whether it was EMI or something else causing the problem, I never tried that trick again and have had no problems since.

Dave Muller · 07-28-2015, 01:40 PM

I'm sure it was an EMI problem. Reminds me of when Dedenbear first came out with their analog delay box, around the same time period. I bought one, was unimpressed, and built a prototype digital delay. It worked great on the bench.

Not so much in the car, near the MSD 7. It went totally nuts! Lots of shielding and bypassing later, it worked okay. My intent was to sell them commercially but the car and the delay box project got parked as I got divorced around that time.

Anyway I don't think having such a problem with an analog ignition implies there would be a problem with the digital one. But I'll check into it.

impstocker · 07-28-2015, 03:58 PM

This is the same set up Coil and MSD 7AL2 I had in my 68 Impala, here it is in my 65. Never had a problem. Just a heads up. What am i doing inside on computer, I should be outside in garage working on 65!!

Will Lamprecht Div1 I/SA 396/325 Impala in progress.

Dave Muller · 07-28-2015, 04:17 PM

I just spoke with tech support at both MSD and Summit Racing, and neither expect me to have a problem. I think the past issues were only with earlier design ignitions.

Dave Muller · 08-19-2015, 08:49 PM

Life has been intruding and slowing things down, but I do have the wiring around my ignition plate done. Since virtually everything electrical goes through here, the result is quite a few connectors.

It would also be nice if the weather would cool off a bit! I'm not asking for much, just hold it to 105?

This weekend is scheduled for maintenance on my bracket car and the trailer, so I don't think a lot will get done on the Chevelle. But maybe a little more time on the body work.

Dave Noll · 08-23-2015, 01:51 AM

HO ... LEE ... S%&T is that nice looking.

Quote:

Originally Posted by Dave Muller

07-28-2015, 01:12 PM	#1
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,821 Likes: 2,915 Liked 5,133 Times in 1,957 Posts	Re: '66 Malibu N/SA Only problem I ever had was where the coil wire passed through.If the grommet wasn't big enough, the wire would blacken at the firewall, like the voltage was leaking to ground. I've had problems with coils overheating and slowing the car down, but not be readily discernible . On a Chevy or Pontiac with rear distributor, I like the coil to be inside and away from the heat from the engine, converter, and headers. On a front distributor like a Buick ,I was afraid the coil wire would be too long and hard to keep isolated, so I would mount the coil right up front where it will catch air from the fan or grill. __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

07-28-2015, 01:27 PM	#2
HandOverFist VIP Member Join Date: Oct 2013 Location: Gulf Breeze, FL Posts: 1,651 Likes: 8 Liked 33 Times in 16 Posts	Re: '66 Malibu N/SA Whether it was EMI or something else causing the problem, I never tried that trick again and have had no problems since. __________________ Rich Taylor I/SA - 321

07-28-2015, 01:40 PM	#3
Dave Muller Member Join Date: Apr 2014 Location: Mesa, AZ Posts: 497 Likes: 162 Liked 223 Times in 73 Posts	Re: '66 Malibu N/SA I'm sure it was an EMI problem. Reminds me of when Dedenbear first came out with their analog delay box, around the same time period. I bought one, was unimpressed, and built a prototype digital delay. It worked great on the bench. Not so much in the car, near the MSD 7. It went totally nuts! Lots of shielding and bypassing later, it worked okay. My intent was to sell them commercially but the car and the delay box project got parked as I got divorced around that time. Anyway I don't think having such a problem with an analog ignition implies there would be a problem with the digital one. But I'll check into it.

07-28-2015, 03:58 PM	#4
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 53 Times in 16 Posts	Re: '66 Malibu N/SA This is the same set up Coil and MSD 7AL2 I had in my 68 Impala, here it is in my 65. Never had a problem. Just a heads up. What am i doing inside on computer, I should be outside in garage working on 65!! Will Lamprecht Div1 I/SA 396/325 Impala in progress. Attached Thumbnails

07-28-2015, 04:17 PM	#5
Dave Muller Member Join Date: Apr 2014 Location: Mesa, AZ Posts: 497 Likes: 162 Liked 223 Times in 73 Posts	Re: '66 Malibu N/SA I just spoke with tech support at both MSD and Summit Racing, and neither expect me to have a problem. I think the past issues were only with earlier design ignitions.

08-19-2015, 08:49 PM	#6
Dave Muller Member Join Date: Apr 2014 Location: Mesa, AZ Posts: 497 Likes: 162 Liked 223 Times in 73 Posts	Re: '66 Malibu N/SA Life has been intruding and slowing things down, but I do have the wiring around my ignition plate done. Since virtually everything electrical goes through here, the result is quite a few connectors. It would also be nice if the weather would cool off a bit! I'm not asking for much, just hold it to 105? This weekend is scheduled for maintenance on my bracket car and the trailer, so I don't think a lot will get done on the Chevelle. But maybe a little more time on the body work. Last edited by Dave Muller; 07-07-2017 at 09:56 PM.

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