[goatman65]

I'm probably wrong,but,I thought I read somewhere that under the dash is 'not' a good place because there is very little airflow to help cool the box.

[Old Man Taylor]

I don't really believe the mounting point is that critical. Some of them fail regardless of where you put them. I had one on the left inner fender panel of my truck for about 10 years (then I sold it), I've had one on the firewall of my '64 GTO since about 1980, and I have one in the glove box of my racecar. I had a transistor die on the one in the racecar, but it was an infant mortality failure (early life failure).

[Cameano]

The only MSD boxes I've ever seen affected by high heat are the Digital 6 boxes. My buddy had one on the fenderwell of his '85 Dodge D150 pickup with a rowdy 440. If he sat in traffic for extended periods, it would eventually shut down, and he'd have to wait a few minutes for it to cool down. We bent up a sheetmetal heat shield for it, and it worked fine after that. We also took a small bit of the radiator air and sent it across the box with the shield.

I've always run MSD systems on my other cars, but since the Firebird came with a full Mallory setup when I bought it, it's stayed. The Hyfire 6al is mounted on the firewall above the header, and doesn't have any issues.

[1967Tempest]

Originally Posted by Cameano

The Hyfire 6al is mounted on the firewall above the header, and doesn't have any issues.

This is where mine is. Can you "hear" it? Like noise feedback in the car??

[Cameano]

Originally Posted by 1967Tempest

This is where mine is. Can you "hear" it? Like noise feedback in the car??

Funny, I never did until tonight when my son tried to tune in his Ipod transmitter to my radio. So the radio was tuned to white noise anyway. It was real faint as it was, took me a little while to figure out what I was hearing.

[1967Tempest]

yeah, I thought that I was going crazy. I probably do have the 4x10 speaker grouded and is picking up the noise.

Thanks
Dave