4.10 rear speedo calibration

[DMSIA07GT/CS]

I've made the change but speedo and MPG calculation is off. What is the fix if any?

 

[CPman]

Did you reflashed the computer and set the ratio for 4:10 ?

 

[DMSIA07GT/CS]

Yes, Its still off by 8 to 10 mph. Maybe thats something SCT forgot with my flash tuner I'll ck with them

 

[DMSIA07GT/CS]

Talked to rep on phone and I guess thats something I can do with tuner. Wish me luck.

 

[SCJSTU]

just had to do it with my Predator.....

you need to know your rim size,tire size and then calculate wheel rotations per mile.........at least on a Predator


heres a site for calculating rotations per mile

Connected Solutions - TIre Size/Gear Ratio Calculator

 

[lightblade]

On a sct u set rear gear ratio and tire rev per mile based on tire height. The gear is for changing gear and revper mile is for changing tire/rim size.

 

[SCJSTU]

oops your right on the rotations per mile for a diff rim.....I have 20 inch wheels is why I had to do it.....

 

[DMSIA07GT/CS]

When I made my purchase from American Muscle, I was asked all the info on car. I thought the speedo cal. was taken care of. Now after talking to SCT and plugging into the car I have discovered a whole new world of info. All I needed to do was select new rear end ratio and bingo, all is good. I have a totally different car with this mod. I would show you pics but I can't get them to download. Besides a K/M cai, Eibach lowering, Axile back exhaust the 4.10 from 3.05 is the sh-t

 

[CPman]

Glad you got it figured out. Programmers are a versitale tool and a must have if you are going to be doing any mods.