Helpful link on Tuning for Smaller SC Pulleys

This guy has a lot of mods, but no intercooler, and running a 3.0" pulley with zero KR:

http://www.davetech.net/car-tuning.htm

so with the purchase of high capacity injectors and a powertuner, this can be done if you take some time tuning it right?

This is the kind of tuning I'm doing right now, when I have the time for it. Here's what I've learned so far:

1) Ambient temps are a big deal. I can tune in my 3.2" pulley at 55ºF, but when it warms up to 65ºF I see KR again, so I have to add more fuel. What I've done is create a tune for every 5º change (I know, it sounds crazy). I'll probably end up using the "warmest" tune for everyday driving, but for the track I'll want it more optimized.

2) With a given SC pulley size, as ambient temps rise you'll find that adding fuel either doesn't remove the KR, or the mix just gets so rich that it hurts performance. At a certain temp, you can tell you've reached the limit when your O2 values go up past the 980 range. At this point, it's time to move up a pulley size (lower boost). My car currently likes a 3.2" under 55ºF, a 3.3" up to 75ºF, and a 3.4" above that.

3) 3.1" and smaller pulleys require bigger injectors, and probably more mods. You must tune for the injectors, and you should get a stronger fuel pump w/ bigger wiring to provide the added fuel pressure. In the above case, I think he had ported/polished heads, ported/polished/wrapped exhaust manis, cam, very cool plugs, and a PCM tune in order to go down to the 3.0".

4) Fuel/octane must be consistent. When you push the SC pulley size envelope, you are so close to knocking that just dropping from 93 to 92 octane can make a difference. Also, bad gas from an unknown source can screw up everything. For this reason, I try to use 94 octane gas from the same station, even from the same pump if I can.

5) Most with experience tuning their cars will tell you that a car with a SC pulley too large for its mods can be tuned to outperform a car with a pulley too small for its mods. Boost is not the answer in making power, it's flow that's the key.

6) An intercooler fixes a lot of the above concerns. It's expensive, but it's the safest and easiest way to run smaller SC pulleys, imo.