This weekend I plan to put a 2.2" pulley on my 1994, S1 L67 Sandrail. Aside from changing the to NGK TR7IX plugs and changing my fuel pressure regulator to 55 lbs, is there anything I am forgetting?

2.2 is pretty small for the 94-95 Gen3 SC....i think that a Stock 2.55 off a 92-93 Gen2 might be better for you

IMO, being in an open environment, and your free flowing exhaust, a 2.2 will be fine. I'd try a larger SC belt tensioner pulley to prevent belt slip. ZZP has them.

The pulley I have now is 2.365" and I'm running 10 lbs of boost.

have you ever scanned for KR?

Nope, but I have no indication I have KR. I'm running a Linx computer that does not use the MAP only engine speed and O2 sensor.

Ours doesn't use the MAP either, it'* just there for the boost gauge. But it does use a knock sensor. Does yours have a boost control solenoid or do you just have the boost control actuator?

Wideband O2?

Scan for KR and check your fuel pressure, or don't do it.

The ambient temperatures where you run that thing are your enemy, not your friend. Air temps will make KR worse.

It took a TON of work for me to get to a 2.2" pulley with the Gen3 setup. And I scan for KR constantly.

KR hurts you more than the timing advance you'd GAIN from higher octane. I hope you're running premium?

I figured if he'* getting 10 psi on the current pulley and his setup (heat probably rolls off pretty easily), the 2.2 would push him to 11.5 or 12, and that'* less than I push.

Do you have a knock sensor on it?

I run at least 100 LL aviation fuel, Sometimes I run race fuel.