I have something I'd like to get an opinion on from the gear heads out there that are using the aeroforce gauge. For little background on this deal I've had this 05 Impala SS since 2009. In 09 I put a front power log on it, did the FWI using the factory air filter box, 180 stat and the Ubend delete. Left it that way until last fall. I got the ZZP 3" DP and the 3.5" pulley. I figured the 3.4" would be iffy and not worth the potential KR nightmare. It has the 180 stat and Autolite 605s . The DP really woke it up but the 3.5 pulley did even more. We have 93 octane here in Mich. I've driven it about 3000 miles on it mostly in cool weather. I just got the aeroforce gauge a few days ago to check KR. I'm seeing 4 degrees max between 5000-5800 when it shifts. Out of curiosity , I tried 16 ozs of Torco in 10 gallons(raising octane to 97) but it didnt seen to affect the KR. No part throttle KR and I usually dont see it until Im past 4500 rpms. Out of curiosity, I pulled the plugs just to see how they were burning. No pitting, no white color,just an even tan electrode, wire and porcelin. I need to get an mail order tune from intense before the warm weather gets here and I suppose it will knock out that KR? The strange part is the 0-60 on the Aeroforce. With these basic bolt on and a stock tune, it claims I'm doing 5.7s 0-60? I did 3 runs on a day where the temps were in the low to mid 60s. I rolled out to 15 mph then punched it, it hooks. The car is quick no doubt. Low end torque is very strong but 5.7 seconds seems a little generous. Are these gauges accurate? Are there any other 3.5" pulley guys out there with a stock tune or mail order tune running 0-60 in the high 5s?