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Re-tuning for 3.73s

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  #1  
Old 03-12-2007, 10:11 AM
DrkBlu02GT's Avatar
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Default Re-tuning for 3.73s

Anyone in the MD/VA/PA area have a tuner to re-tune my 3.73 gears. I dont want to fork out the 300.00 or so just for one thing or pay alot of money to get it done. Thank you
 
  #2  
Old 03-12-2007, 08:13 PM
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Youll have to get a chip or XCal either way. Best thing to do would probably get order a chip from here, Modular Depot, or Modular Powerhouse with a mail order tune on it.
 
  #3  
Old 03-12-2007, 08:18 PM
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You can't use someone elses tuner. They are coded for the car once you use it unless you put the stock tune back on it. In short, if you use it for your car, the other guy can't.
 
  #4  
Old 03-13-2007, 05:13 PM
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You're speedo won't be that far off...just drive it like that for awhile until you need a tune
 
  #5  
Old 03-13-2007, 05:39 PM
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I have a chip I need to get rid of.
 
  #6  
Old 03-14-2007, 05:46 AM
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Originally Posted by El Diablo
You're speedo won't be that far off...just drive it like that for awhile until you need a tune
Unless it's an automatic; the trans won't shift properly, in addition to the speedo being off. With a stick car you can also use a speedcal or abbott box, but if a tune is in your future, get a chip or hand-held so you don't fork over cash for a part that will soon be unnecessary.
 
  #7  
Old 03-14-2007, 09:07 AM
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its a manuel transmission

I was looking at this speed-calibrator-94-04 How does it work and where would you plug it into?
 
  #8  
Old 03-14-2007, 03:27 PM
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your thoughts on that above
 
  #9  
Old 03-15-2007, 06:18 AM
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What it does is ratio the signal from the speed sensor to the PCM; that one looks like it plugs in right at the speed sensor connector. This is the kind of device I mentioned above. There are several dip switches inside the unit; you set them in a particular order to match the correction factor you need to make the speedo read properly (a list is included with the device). If you currently have 3.27 gears and are installing 3.73s, your speedo will read fast, so divide 3.27 by 3.73 to come up with a .876 correction factor, set the switches to most closely match .876 and you'll be real close.
 
  #10  
Old 03-15-2007, 07:34 AM
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Originally Posted by Wheat
What it does is ratio the signal from the speed sensor to the PCM; that one looks like it plugs in right at the speed sensor connector. This is the kind of device I mentioned above. There are several dip switches inside the unit; you set them in a particular order to match the correction factor you need to make the speedo read properly (a list is included with the device). If you currently have 3.27 gears and are installing 3.73s, your speedo will read fast, so divide 3.27 by 3.73 to come up with a .876 correction factor, set the switches to most closely match .876 and you'll be real close.

oh ok thank you for the helpful info Wheat.
 
  #11  
Old 03-15-2007, 12:48 PM
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get a speedcal! cheap!!!
 
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