My UTEC and tach disagree at lower speeds. The UTEC is saying that I'm ~150rpm lower than the tach @ 2500 and 3750. These were in lower gears, not at 80mph; but I don't think that that would affect anything.

 

Well, the spreadsheet says you should be turning 3600 RPM at 80mph, so that 150 RPM difference matches that exactly. Problem solved.

 

Thanks a bunch dude. I wish things like this came easier for me. I have to be able to touch, see or visualize.

 

See, I'm pretty lazy when it actually comes to the hands-on stuff, so theoretical discussions are right up my alley.

 

so after all that, the gear box for a 2002 wrx, and a rs are the same, in ratios. 1-5? if they are, is the sti tranny the same box with smaller gears(shorter), or is it the same box with one extra. becasue i think it would be nice to keep the 1-5 gears, and add a full 6th gear, that is in ratio relation to 5 gear. kinda like gran turismo, where you can change sport to full out ratios for the tranny.
to bad you can not just have a tranny like a bike and just add another ring from 42 teeth to like 58. that would be fun.

 

No, RS ratios are actually much shorter than the WRX. The 5 and 6 speed gearboxes are totally different, for which STi owners are grateful.