I don't have a pressure gage because I'm going to go turbo by the end of the year...I just got a wi-band and i'm installing it tomorow...I just kinda guess and I already know that my bottle last about 6-8 races depending on how long i spray witch usually isn't all THAT LONG...and yes you will definalty need a clutch..if the stock clutch is fine it will hold for a couple of months from what I hear..maybe like 4-6...and if you are getting drag radials even worse...I have a stage 2 centerforce ford racing...but my car is fine so fat...running like new and hopefully it will stay that way...and yes I think the car is fine at a 100 shot if tuned and used right..i'm still going to 75 just in case...and if I feel like smoking someone that is talking crap about focuses and i know i can with the 100...then I'll go 100 just for him...until i go turbo
