Originally Posted by Cab_Burge

The race MSD boxes are voltage sensitive, especially if the battery voltage get down near 12.25 V work


Totally agree on this....


And I think you got lucky on the batteries...My 60fts were in the 1.31-1.33 range...One battery I bought lasted only one weekend and mine was mounted so the plates would be least affected.

I am now trying out XS batteries...They add 10bs to the 34lb weight of a Red Top, but its got 1250CCA and a big reserve.

'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk