You can type here any text you want

TT chip & Speedometer error

Welcome!

By registering with us, you'll be able to discuss, share and private message with other members of our community.

SignUp Now!

tlturbo

Tag - WUTSA V8
Joined
May 27, 2001
Messages
640
I just got a new TT chip for my new Alky kit from Julio to replace my old SCM system that croaked. I read a thread today on the Suspension/Tire section about tire size affecting speedometer and I remembered the question Eric asked when making a chip about Does it read the speed correctly? I didn't give it much thought so answered Probably but now I'm concerned.

I have 295 55 15 M/T Street Drag Radials which are I believe a tad over 28". the other post says a 28 vs a 26 tire is about a 7% speedometer error - 107 mph actual vs 100 reading or 53.5 vs 50 mph.
I know there is a converter lockup based on mph but will this speedometer error affect the other operation of the chip?

I know I can try and find a different tooth speedometer gear but is that necessary or will the chip work OK as is?
Thanks
 
Back
Top