I think Devek dyno day had a few runs with and without a modified autopower??? chip. gains were very minimal, even overall, and some slight torque peaks, but nothing over 2-5hp.

seems like the S4 is pretty well tuned from the get go, and exhaust mods really do most of the gains.

the 85 and S4 both use the same Autopower chip. i have a set from a friend, but havent checked it out yet. i would love to think i could get 10hp from it, but i be that is doubtful at best.

mk
MK

 

I think these might work in my 82. Prolly will work just as advertised too! I'll let you know when I find out.