msd coils: HVH vs Pro Power pros and cons?? better one?

[MEXJOE]

I guess what I was asking was, Rather than the combo of MSD components...
Would you see a difference for a specific engine combo due to combustion chamber style shape etc.
Or will you automatically need to lower your timing 2 deg. with this coil
Here is my situation.
I did not dyno with my MSD setup THAT IS IN MY CAR.
THE MSD ON THE DYNO USED A 7AL2 AND A PRO POWER COIL.
I have the 6AL and the 8252 coil in my car.

Thanks

Originally Posted by Techwest Racing Services

MEXJOE

Short answer combo does not matter. If you hook up the box & coil on the bench with an oscilliscope. Then vary the sparkplug gap from narrow to very large you would find that the MSD 8251 coil is very fast reacting coil when compared to the MSD 8201 coil. We repeated this same kind of testing over the past couple of years during dyno testing. The results were the same the MSD 8251 coil was a better match to the 7 series boxes. Thanks for the great question!