Dyno tune again or auto tune?

[BadHabit]

I am taking the new build in this weekend for a dyno tune. I have a 2-1 with a white brothers muffler. Ive installed all the discs for the tune (20) but am not sure if I can get used to the extra noise. I usually run 14-16. My question is this. If they tune the motor and it likes 20 the best and I want remove a few discs later will I be able to run auto tune and still be pretty close to the tune or will I be way off?

[harpwrench]

What's the build?

[BadHabit]

95"   9.85:1 compression, S&S 570 cams, hdsp street pro heads, big sucker breather and supertrapp/white-brothers pipe

[harpwrench]

I'd be conservative with the discs, with that cam. I suspect it would like 12-14 at the most for part throttle response and possibly even hp. You won't like it if the tuner goes for maximum discs/power before losing bottom end at WOT, it's not the best way to dial in how it runs overall. WB doesn't need as many as supertrapp. I've run a similar combo of pipe/cam at 103" and also run the WB 2-1 on a V111. My 111 likes 15 discs fwiw.

[harpwrench]

It's really best if you can figure out the disc count that responds best for normal riding, get it tuned then don't deviate from that after the fact.

[BadHabit]

For the sake of conversation let's say that the bike makes the most power with 20 discs and is dyno tuned with that many. How close will I be able to get if down the road I choose to back it off to let's say 14 discs will autotune allow me to still keep a very good tune or am I basically starting over from scratch?

[harpwrench]

It's better to pay extra and get 2 maps, if that's how it pans out, so you know its right.