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Old Oct 6, 2006 | 08:43 PM
  #1  
james-wrx's Avatar
james-wrx
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Default P1 Gearbox

Guys,

I have a 95 WRX import running 320 hp and it is supposed to have a P1 gearbox
in it, the ratios do seem short, max speed would be 160mph @ 7.5-8k revs rough estimate, im not convinced it's a P1 box, what would the difference be to the Jap box, apparently there is 65% or so drive to rear wheels ( does feel more rear wheel than front) is the Jap box similar ?
reason I ask is 3rd gear synchro has gone and it's getting a bit noisy !
Thanks for all the help
james
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Old Oct 6, 2006 | 10:47 PM
  #2  
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From: Swindon
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The P1 box is a "JAP" box as its pure Sti5

Bob
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Old Oct 6, 2006 | 11:07 PM
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From: Lincs
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As above.

AFAIK its the final drives that have been changed on P1's to make it more suited to UK speeds (although with a limit of 70mph )
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Old Oct 7, 2006 | 08:55 AM
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Originally Posted by Dill_typeR
As above.

AFAIK its the final drives that have been changed on P1's to make it more suited to UK speeds (although with a limit of 70mph )
How much difference will an sti box make, I do 500 miles each week so 5th gear ratio is quite importnant is the sti a lot shorter, what other options are ther, what about rebuilding P1 box ?
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Old Oct 7, 2006 | 12:52 PM
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50:50 drive as per Uk models
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Old Oct 9, 2006 | 11:20 AM
  #6  
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From: Lincs
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Originally Posted by james-wrx
How much difference will an sti box make, I do 500 miles each week so 5th gear ratio is quite importnant is the sti a lot shorter, what other options are ther, what about rebuilding P1 box ?
do you mean waht revs will you be doing?

In 4th 100-110mph=redline
5th gear 80mph = 4300rpm or there abouts
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