WHAT SIZE GEARS FOR 1/4 MILE
04-03-2007, 10:15 PM
#1
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WHAT SIZE GEARS FOR 1/4 MILE
I already have 4.10s but I just went to the track and I ran out of 4th gear about A second or so before I went through the traps.
So what do I do... Go with 3.90s and hope to stay in 4th or ftw, and go to 4.30 , 4.56 or bigger?
So what do I do... Go with 3.90s and hope to stay in 4th or ftw, and go to 4.30 , 4.56 or bigger?
04-04-2007, 12:20 AM
#5
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RE: WHAT SIZE GEARS FOR 1/4 MILE
ORIGINAL: Thurman
275/40/17
275/40/17
04-04-2007, 12:36 AM
#7
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RE: WHAT SIZE GEARS FOR 1/4 MILE
1+
ORIGINAL: 28HopUp
Most 275/40R17 tires measure 25.7" (+ or -) in overall diameter. The stock 235/55R17 P-Zeros are 27" in diameter, which would lower your RPM through the traps. If you can find 28" tires, that would give you even more legs through the traps, and you won't have to change out your 4.10's.
ORIGINAL: Thurman
275/40/17
275/40/17
04-04-2007, 01:43 AM
#9
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Posts: 237
RE: WHAT SIZE GEARS FOR 1/4 MILE
With your 4.10's and 25.7inch tall dr you are effectively running a 4.30 gear which is why you are running out of fourth gear through the traps. Either run a 27inch tall dr which will keep your gearing at 4.10 instead of 4.30 and you will barely finish the run in fourth or run a 28inch tall dr which will give youless than a 4.10 gear so you can get through the traps in fourth with room to spare.
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