problems with the speedo calculator
Hi Im new to this tuner. I have 02 Chevy trailblazer I6 regular. I have 3.42 gear ratios change tires from 245/65/17 to 265/35/22.
Problem is I dont know the drive or the driver sprocket for my trans which is 4l60e. And my Speedo Fine Tuning is all zero. What is the correct calculation? thanks
Stay tuned! This is gonna be fun!
Quote:
Originally Posted by
goldbergv95
Is this normal?
I had a tune up with pcmforless, the Vehicle Speed senor reads 65724 and the Trans Output Shaft Rev reads 2637.4.
But when I got another tune from them for an addition of changing gas to premium and I change the tire size and gear ratio to 3.42 which is what the truck gear ratio originial came from orgininal tires 245/65/17, I calculated my now tire size with my gear ratio 3.42 and tires aftermarket 265/35/22 the Vehicle Speed senor reads 58503 and the Trans Output Shaft Rev reads 1462.6.
But now for future purposes when I swap my gear ratios from 3.42 to 4.10 the Vehicle Speed senor reads 70138 and the Trans Output Shaft Rev reads 1753.4.
Is this normal? Because the Vehicle Speed sensor and the Trans Output Shaft Rev starts right between, then lower now its higher(4.10)
Stay tuned! This is gonna be fun!
Brian uses LS1 Edit. Your EFI LIVE stuff will work differently.
I'm still suffering with it. The speedo stuff is complicated.
Chuck CoW