Don Terrill’s Speed-Talk

I am switching from a MSD 7AL-2 ignition box to a (# 7520) digital-7 box..... I am running a #8201 MSD Pro Power Coil at this time.
Would I be better off to switch coils to a #8261, or can I stay with the #8201 coil with the new box?
TIA

Rallye Bob

Please don't use the Pro power coil, go with either a MSD 8251 or MSD 8261 coil. If you want to save some cash on the change you can snag a MSD 8251 for around $130 and be down the road. We have found the MSD 8261 coil does show a difference on the bench but it does not show up on the track or Dyno. Hope this helps you out...

Thanks for the response Pat.

I did not mention in my post, that I am running a crank trigger on this build. Does this change your recommendations at all?
I am going to go with the 8261.

Thanks again....

No it changes nothing.

How long do those 8251 last? Mine is a few years old but is just used 7 months of the year. Should coils just be changed after so long or if everything seems ok it likely is

The 8251 coils are stout pieces so they can take it. But like everything in a high energy environment we like to suggest every 3 to 4 years swap a fresh unit in. If your not in a tight class were all are hundreths away from each other than 5 to 6 years would be a good bench mark to work with.........

www.msdignition.com go to the forum tech section.