If im doing 55, what will my speedo read approximately??

jb1dsl

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May 24, 2004

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Marianna, Fl.

Oct 18, 2009

#1

• Oct 18, 2009

• #1

I have never changed my speedo drive gear and was wondering what my speedo should roughly read at 55 mph. I went from the stock 3.00 to 3.55's. I think i have been told in the past that i need a 20 drive gear right?

any help is greatly appreciated!!

 

2

2+2GT

10 Year Member

Apr 25, 2009

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Southeastern Pennsylvania

Oct 18, 2009

#2

• Oct 18, 2009

• #2

Well, without more info, it'd be a guess. Try this:

speedo gear calculator - Google Search

 

jb1dsl

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Marianna, Fl.

Oct 18, 2009

#3

• Oct 18, 2009

• #3

what info u need?

26" tires, c4,??

 

jb1dsl

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Marianna, Fl.

Oct 18, 2009

#4

• Oct 18, 2009

• #4

tires calculate out to a 25.33.

 

chris66dad

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Dec 19, 2008

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Benicia California

Oct 18, 2009

#5

• Oct 18, 2009

• #5

This will get you the number of teeth:
http://www.sccoa.com/faq/speedgr.html


Ebay dealer with the same info to confirm what you need:
http://cgi.ebay.com/ebaymotors/Spee...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

Good Luck and BE safe
Ron

 

jb1dsl

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Marianna, Fl.

Oct 19, 2009

#6

• Oct 19, 2009

• #6

Thanks. That confirms the 20 tooth gear but does anyone know the approximate speed my speedometer will read if I'm truly doing 55??? That is what I really need to know.
Posted via Mobile Device

 

mustbereel

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May 6, 2005

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Escondido, CA

Oct 19, 2009

#7

• Oct 19, 2009

• #7

jb1dsl said:

Thanks. That confirms the 20 tooth gear but does anyone know the approximate speed my speedometer will read if I'm truly doing 55??? That is what I really need to know.
Posted via Mobile Device

Click to expand...

Assuming your speedometer was accurate with the 3.00s it will now read 65 when you are going 55. 3.55/3.0*55= 65

That is until you change to the 20 tooth gear. Then use the calcuators in the above links to confirm.

 

jb1dsl

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May 24, 2004

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Marianna, Fl.

Oct 19, 2009

#8

• Oct 19, 2009

• #8

mustbereel said:

Assuming your speedometer was accurate with the 3.00s it will now read 65 when you are going 55. 3.55/3.0*55= 65

That is until you change to the 20 tooth gear. Then use the calcuators in the above links to confirm.

Click to expand...

Thx, that was the answer I was looking for!!