not, me, i just pull out a bunch of timing, i increased my max to 26* before adding the kit, then i backed it down to 21* max for the 150 shot. I might lose maybe 15rwhp-20rwhp max from the dip in timing, but on the other hand when it matters I will be gaining 125rwhp when it matters, and a more impressive tq curve.

Now if I had the coin to do a stand alone fuel setup like posted above, theres no chance in hell I would retard my timing. I would just spray 116oct from that fuel cell. The high octane from the fuel cell won't kill o2's

 

I use 91 Oct in the main tank and C16 in the stand alone. It works great.

 

30 Deg Na........... 20-22 Deg 150 Shot

 

I went with the Harris Dry Kit and Interface. The interface will pull the two or so degrees of timing necessary when spraying a 100 shot. Adjustable by dip switches. Logging, tuning, and checking a/f on wideband tomorrow, so I'll let you know how it goes.



Dry kit installs between TB and intake, just like you wanted:

 

I'm pretty sure you don't need to pull any timing for the 100 shot
I pull 6 degrees for the 150 though since we only have 91 octane around here