Gearing question
Joined: Mar 2001
Posts: 37,305
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Originally Posted by PilotSi,Apr 8 2006, 12:28 PM
Anyways -- so if me & the OP both have 4.57s, but we're revving high on the hwy (and him on the track)...what gives? I have stock sized tires, and they're inflated to the recommended pressures of 35psi. What else would cause this shorter gear ratio?
That's the only variable I can come up with - tires. But ~-1" difference on stock rim/tires? (referencing xviper's number from earlier)
That's the only variable I can come up with - tires. But ~-1" difference on stock rim/tires? (referencing xviper's number from earlier)
Let's say there is a discrepancy in tire diameter. A difference of 0.7" would introduce an error of about 3% to the speedo.
Joined: Feb 2001
Posts: 4,063
Likes: 365
From: Redondo Beach
The rpm on the stock tach is also an error source. For example, mine reads about 100rpm higher than the display on my VAFC; not sure which is closer, but obviously there's room for error there too.
Crayon, guys, crayon.
Crayon, guys, crayon.
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