my friends got a 92 hatch with turbo gsr motor/gsr trans...hes got the rev limit set at 8200 and at the end of the 1/4 its hitting rev limit in 4th gear pretty bad (around 120mph traps)...so without changing the rev limit (its not tuned beyond 8200) and without changing any gearing...what size tire does he need to be able to around 125 in 4th?..right now hes got 205-50-15 drag radials.....looking for sizes in street tires and for slicks....TIA

 

Go here http://www.jadesupra.net/gears/index.html
I forget what 4th gear and Final drive a GSR is but put that into the grid (FD is Axle ratio) and mess with tire sizes until you get 125 at 8200.
But remember, a slick will have close to 1 inch of expansion turning that fast.

HTH

 

cool thanx...i found the ratios and put everything in and its saying that it should be able to go 124mph in 4th right now but my friends hitting rev limit 3 times before going through the traps at 120 so something must be off a little

 

tire wear?
or tach is off

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pelican &raquo;</TD></TR><TR><TD CLASS="quote">Go here http://www.jadesupra.net/gears/index.html
I forget what 4th gear and Final drive a GSR is but put that into the grid (FD is Axle ratio) and mess with tire sizes until you get 125 at 8200.
But remember, a slick will have close to 1 inch of expansion turning that fast.

HTH</TD></TR></TABLE>

... sweet link!!!... here is the info i used for a gsr (got it from hybridgarage) :
axle ratio - 4.4
first gear - 3.23
second gear - 2.10
third gear - 1.45
fourth gear - 1.10
fifth gear - .848
sixth gear - 0