What is the issue with using the MSD coil pack?

[D-ROK]

Ive had the same msd coil on my car for 6+ years, 70k miles, and 435+ hp. The only time I had issues was with it overheating. Slapped a heat shield on, no more issues.

[Moyeah]

I had a MSD coil pack on for around 40k miles no problem, but I switched back to a stocker with a heat shield just to be safe.

[tunerlover3]

Some of the MSD's work, but they have a super high failure rate. Its just not worth it for the .5HP gain you may get.

[slayer720]

Quote: Originally Posted by bzzt

I bought a car that didn't have upper or lower heat shield but came with a broken one in the trunk.
It's made from some fairly thick aluminum.
For the time being at least I traced it onto some thin metal I found in my attic and made my own.

I can't tell how thin the metal that you used is from your pics, but if it's like 1/32 of an inch (.032") thick or less then it's probably not doing much as far as deflecting goes. That and the fact that it looks like steel which will retain the heat for longer.
Guy's if you're going to make your own, pick up some 1/8 of an inch (.125") thick aluminum and fab on up . The aluminum will dissipate and reflect heat a whole lot better... just throwing out an FYI.

[SRT4night]

According to MSD they had a insulation problem on the earlier production runs.. has been fixed since as they now use a different insulation material. I have had 1 on my DD for over 70K not a single issue, and my toy for over 30k and no issues, other than a hotter spark.

Yes, I know.. your milage may vary and this is just my exp,,