MSD Power Grid + 7AL2

[Average Joe]

Are you using the rev limits in the grid controller or the chips in the 7al-2? MSD acknowledges a harsh rev limit if you use the rev limits function in the grid and recommend using the chips in the 7al boxes when using the grid.

[Darrin Christen]

Thanks for the replies. Yes I'm using the rev limits in the Grid controller. I actually spoke to a MSD rep on the midway explaining my issue. He could not explain why it was so rough but suggested I go back to using my three step instead of the Grid Controller for the rev limits. I'm assuming this is not an issue when using the complete Grid ignition system?

[Average Joe]

That is the reason why I bit the bullet and bought boy the 7730 and 7720. It is a much cleaner setup to install that way and then your rev limits will work just fine via the grid controller.

[Steve Polhill]

We run that exact thing on our comp car and I noticed the same thing. What I did was Set all the RPM Limiters to 12,000 RPM and piggy backed a regular 2 step on the grid. Problem solved.

With ours being a 4 cyl Comp car when the 2 step from the Grid Box came in, the whole car would rock back and forth.

I was told it had something to do with the Grid box being digital and the 7AL being Analog.

[Darrin Christen]

Thanks everyone for the help. Time to make a decision to go back to the old rev limiter or spend some $ on the rest of the grid system and sell off the 7al stuff.