Gearing question
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Originally Posted by r26372,Apr 5 2006, 11:53 AM
Tires can alter this as well. If you have tires that are smaller than stock this will increase rpms as well.
But, it would be rather strange to have exactly the same rpm you should with 4.77s.
But, it would be rather strange to have exactly the same rpm you should with 4.77s.
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Originally Posted by DJFriar,Apr 5 2006, 01:04 PM
WOuldn't that be like a free upgrade, or is there a reason that 4.56's would be preferred over 4.77's ??
Also, each gear has its advantages and disadvantages depending upon the track the car is used on. Having a higher gear ratio is not always considered "better" or an "upgrade".
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Originally Posted by r_duff,Apr 5 2006, 01:14 PM
How many teeth should a 4.44 ring have?
I "think" it's 40 ring, 9 pinion.
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From: socal
Originally Posted by xviper,Apr 5 2006, 12:59 PM
I can't remember. It's just a matter of counting the teeth on the ring gear and divide by the ones on the pinion gear.
I "think" it's 40 ring, 9 pinion.
I "think" it's 40 ring, 9 pinion.
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From: High Knob Mountain
Originally Posted by Wisconsin S2k,Apr 5 2006, 03:43 PM
what did you set your correction to on your yellow jacket? what % correction?
I am going to try and borrow another GPS to confirm any differences there.
Next I will get under the cars and try rotating the tires.
Jeff has been very accommodating.
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From: SLC, UT
I've got my yellow jacket set at 20, which is a 10% correction with the 4.57 gears. When I drive by radar speed signs, the speedometer is right on (usually around 30-40 mph zones). When I talked to Jeff about the setting, he said most of the people running the 4.57 gears were also setting it at 20. I'm not sure if the year of the transmission will make a difference? If the year of the transmission doesn't matter, your setting is probably too high which would account for some of the error. I know when I had it set at 21, it was still too high.
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Odd. I just got mine in, and mine is set at 10 for a correction of 5%. I used the gear calculator to determine the right mph @ right RPM and set it like that. So I got it up to 4000RPMs, and then hit the dial until 70mph @ 4000RPMs. Probably not the most accurate...But I figured since I'm running w/ stock tire sizes, it shouldn't be too wrong.
What other ways can you calibrate this w/o having a GPS nor an Interstate? Pace someone?
What other ways can you calibrate this w/o having a GPS nor an Interstate? Pace someone?