I changed my wheel /tire circumferance to hit boost quicker

[Faultline]

mY turbo set up pulls pretty well btween 3500rpms and 6500rpms.It cost over 3k, so I am broke and have stock steelies,..rather than Paying 800 for a tire/wheel pachage, i am optiong for new tires and lowereing spring for around the same price....I need a stiffer suspension to go withe stickier tiires and a turbo...I just put on 215/40/16s.. this chngeges my circle from roughly 78"to 72"..thats 12ft of distance from the formerly 13ft...given same rotations...so after the ride home...I believe I hit boost quicker..which really speed up acceleration...I feel faster ...but my odometer I believe is lying to me ...so it is just feel...so now my gears ar shorter i guess...but ther is plenty left at the high end...Imagine...6krpms in 5th gear...so.....any thoughts to confirm or refute this??????????

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[satur9]

changing to a smaller tire will lower the gearing and change the speedometer i think tirerack.com calculator will tell you the percentage of speedometer change.and somehere out there is a gearing calculator. but i would think you would have less traction with smaller tires (less contact patch) i guess its personal preference but wider tires just seem better.

[Faultline]

I did not think about that...the contact tire patch...being smaller..but I guess it would be...but.....the tires are slightly widr than before..from 205 to 215..which would give a little more tire contact....It is just that it dawned on me , that the sooner I get to the 4k revs...then,...mor power for me...no matter what! so.,besides traction...I did this to get into boost sooner......and btw the tires are kuhmo estes 712..tks for the reply satur9

[philndz]

Runnin the Kumho Ecsta 711's over here and am practically in love w/ em...how you liking yours......if you havent yet then push them and push them they just cling in the corners....my vibe is on rails!!!

[Faultline]

quote:Runnin the Kumho Ecsta 711's over here and am practically in love w/ em...how you liking yours......if you havent yet then push them and push them they just cling in the corners....my vibe is on rails!!!because I changed my circle smaller, it made it easier to spin the wheels , especially w/ lots of power,I was dissapointed when I left the tire shop ,and spun the tires easier in firts gear...beacause, I was looking for mor traction ...but then, pulling as hard a I can in 2nd and third, I got no tire chirps that I usually do.......so On my way to work tomorrow, I will test the curves along the faultline road, but I have yet to lower my vibe, which will realy help stiffen me up...over all , except for my lower 1st gear...I can tell that the traction is better,yeah Philndz, you and others posted how well you liked the kuhmos, and I am not disapointed TKS!