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3.90s or 4.10s?!

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Old 08-11-2011, 11:10 AM
  #21  
Blacksmoke
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Originally Posted by Norm Peterson
There is only 5% difference between them, so rpms at any given speed and even acceleration isn't going to be hugely different. In virtually all cases, you might as well go with the FRPP 4.10's.

The only times you might choose 3.90's would be if you absolutely need to avoid an upshift that would be forced by the 4.10's but not the 3.90's, and there aren't very many situations where this is likely to occur.


Norm
Bingo! Very well said as usual Norm!
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Old 08-11-2011, 10:24 PM
  #22  
BlackBeauty4.6
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Yea I figured it would be 4.10s.. I just over worry sometimes about choosing what's the correct setup.. Now with 4.10s I will say alot of times when I get a little race is cruising usually like 40-55.. Now how are they at that speed as far as like pulling through the gears?
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Old 08-11-2011, 10:36 PM
  #23  
madmann26
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Originally Posted by BlackBeauty4.6
Yea I figured it would be 4.10s.. I just over worry sometimes about choosing what's the correct setup.. Now with 4.10s I will say alot of times when I get a little race is cruising usually like 40-55.. Now how are they at that speed as far as like pulling through the gears?
At 40, you might be able to grab 2nd, at 50-55, grab 3rd and just nail the **** out of it, you'll like it, you'll hold 3rd to around 90 or so, then 4th, which is good to about 135 I think,

Don't ask me how I know.
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Old 08-12-2011, 03:04 AM
  #24  
Ricardo
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Yeah, be careful with the sudden downshift into 2nd unless you have great tires and it's dry outside....you'll lose all traction with 4.10s. And on the highway is no bueno!
You'll learn the gears and the new limits of them quickly. Have fun with it!
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Old 08-13-2011, 11:46 AM
  #25  
boss hoss
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4.10's!!!
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Old 08-13-2011, 11:54 AM
  #26  
157dB
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I didnt know 3.90s were available for the S197s 8.8 rear end.
I thought it went 3.31 3.55 3.73 4.10 4.56...
There are only so many pinion teeth/ring teeth configurations.
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