Speedo in SE: calibrated to which wheels size?
#1
Speedo in SE: calibrated to which wheels size?
OK, here's a question about speedos. IF I consider changing wheels on a SE, I'd like the speedo to be as accurate as possible. So, what size should I calibrate it to? Should it be the "stock" 185/70-13 tire, or the SE stock 205/60-14 size? Was the SE speedo calibrated to that tire, or all all the speedos the same?
Thanks...
Thanks...
#2
I can has a Hemi? Yes...
iTrader: (2)
Re: Speedo in SE: calibrated to which wheels size?
Originally posted by pjr
OK, here's a question about speedos. IF I consider changing wheels on a SE, I'd like the speedo to be as accurate as possible. So, what size should I calibrate it to? Should it be the "stock" 185/70-13 tire, or the SE stock 205/60-14 size? Was the SE speedo calibrated to that tire, or all all the speedos the same?
Thanks...
OK, here's a question about speedos. IF I consider changing wheels on a SE, I'd like the speedo to be as accurate as possible. So, what size should I calibrate it to? Should it be the "stock" 185/70-13 tire, or the SE stock 205/60-14 size? Was the SE speedo calibrated to that tire, or all all the speedos the same?
Thanks...
Are the same. No "real" difference. Even the '85 SE Rear end ratio of 4.076 to the "regular" GSL 3.909 only has a difference of 4.0972%.
At 60 Mph, a difference of 4.0972% = 62.458 mph.
Well within a margin of error of +/- 5 mph.
#3
Re: Re: Speedo in SE: calibrated to which wheels size?
Originally posted by Directfreak
All speedos are the same. The external diameter of the tires:
Are the same. No "real" difference. Even the '85 SE Rear end ratio of 4.076 to the "regular" GSL 3.909 only has a difference of 4.0972%.
At 60 Mph, a difference of 4.0972% = 62.458 mph.
Well within a margin of error of +/- 5 mph.
All speedos are the same. The external diameter of the tires:
Are the same. No "real" difference. Even the '85 SE Rear end ratio of 4.076 to the "regular" GSL 3.909 only has a difference of 4.0972%.
At 60 Mph, a difference of 4.0972% = 62.458 mph.
Well within a margin of error of +/- 5 mph.
I'm not being **** about this, but 5 mph is a lot in my neighborhood...4 mph cost me one ticket this year already. Doesn't help that the police chief lives 5 houses away either.
#4
I can has a Hemi? Yes...
iTrader: (2)
Re: Re: Re: Speedo in SE: calibrated to which wheels size?
Originally posted by pjr
Can I ask a question about the rear end difference? So, the SE read end of 3.909 makes the speedo read about 2.5 mph too fast? or too slow?
Can I ask a question about the rear end difference? So, the SE read end of 3.909 makes the speedo read about 2.5 mph too fast? or too slow?
The difference as I stated, (with all factors being constant) is 4.0972%.
So At:
So, based on the SE gearing, your speedo would read a teeny, tiny bit higher than you are actually going.
Again, with a rule of thumb of +/- 5 mph for error, you can see that you technically be speeding, So keep 5 mph under the limits to make sure.
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