Quick gears speed question.
Thread Starter
Bullitt Member
Joined: October 28, 2006
Posts: 366
Likes: 0
From: Kuwait City
Quick gears speed question.
My car had to go to the dealer and is back on the stock tune. The tune is for 3.31 gears, but I have 3.73 installed. I am correcting the speed in my head using this forumla, am I correct?
3.31
-------- = 0.887
3.73
Speedometer Speed * 0.887 = Actual Speed.
3.31
-------- = 0.887
3.73
Speedometer Speed * 0.887 = Actual Speed.
Last edited by zaghloul; Jul 1, 2008 at 10:45 PM.
Mach 1 Member
Joined: October 14, 2006
Posts: 716
Likes: 0
From: Tucson, Arizona
There are THREE scalars that need to be changed in SCT's software, Advantage III:
1) Axle Ratio Switch - Must be turned "on" to make changes in #2 & #3,
2) Axle Ratio - Numeric ratio
3) Tire Revs per Mile - I use the tire manufacturer's specs. If it's not listed, I calculate this based on tire diameter.
FYI, yes I write my own tune files.
1) Axle Ratio Switch - Must be turned "on" to make changes in #2 & #3,
2) Axle Ratio - Numeric ratio
3) Tire Revs per Mile - I use the tire manufacturer's specs. If it's not listed, I calculate this based on tire diameter.
FYI, yes I write my own tune files.
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