can anyone tell me about how far off my speedo is with a -1 front sprocket on an 02 f4i???

 

What is stock gearing -- I gotta know that to calculate the diff. Generally 1 tooth down in front is gonna be about 6%

 

yea mang...mines was like 7.5% with -1 for an F4i.

 

I have the -1 rear sprocket and when my buddy was going 65 in my truck, I was riding next to him and mt speedo said 90. My ****s way off. I really need a speedo healer. I also have a 180 rear tire instead of the stock 160. That prolly doesn't help much either.

 

Average is gonna be 6 or 7%for your stock tyre size

 

i've got no clue on the actual gearing but it looks like around 7% will be somewhat accurate, i appreciate the help, i just wanna have a rough idea of how fast i'm going. thanks

 

My RR was about 10 mph off.

 

is this plus or minus 6 to 7 %

 

Plus with a smaller front sprocket. So if you're showing 100mph you'd really be doing 93ish. This is only if the speedo was correct with stock gearing -- they generally read around 5% happy with stock gearing anyway but occasionally they are right on the money stock.

 

yo mang....it's all a percentage...not set...but increases with speed.