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> trans help, 901 racing tranny
porschechuck
post Apr 12 2007, 09:53 PM
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Hi all,
Raced at road Atlanta last month came 4th against H.O. 2.2 sixes with my 2.0 4cyl. But trans issues, running a stock '73 box. On the back straight 4th pulled barely, and 5th was just blaaaah no increase in revs. I need help! We've tigged a diff to create a locker, Mid ohio teener club thanks, but what gears and where can i buy them. thanks for any thoughts and recommendations
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DanT
post Apr 15 2007, 10:17 AM
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Greg, are you using a stock ring and pinion with stock final drive...?

I have been considering a A,F,Ka,R,Z box for my 2056 build.

Anyone out there done this one?

Ka is a stock ZD flipped
R is a stock V flipped
Z is a stock N flipped.

this way I would not need to buy any gear sets...just use what is already in the tranny.

New motor should be good for about 6K rpms. maybe 6200. (IMG:style_emoticons/default/smile.gif)

with this box there would only be about a .4 gear ratio drop from 2nd to 3rd and 3rd to 4th.

here is a sheet with the stock vs custom gearing


Attached File(s)
Attached File  gear_ratios_from_stock_gears.txt ( 618bytes ) Number of downloads: 144
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stownsen914
post Apr 17 2007, 09:44 AM
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QUOTE
Ka is a stock ZD flipped
R is a stock V flipped
Z is a stock N flipped.


There's only one problem with flipping a stock V 4th/5th ratio to get an R ... you've now got an R 3rd gearset (not 4th). Flipping the ZD and N gearsets does work as you suggest.

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Aaron Cox
post Apr 17 2007, 11:53 AM
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QUOTE(stownsen914 @ Apr 17 2007, 08:44 AM) *

QUOTE
Ka is a stock ZD flipped
R is a stock V flipped
Z is a stock N flipped.


There's only one problem with flipping a stock V 4th/5th ratio to get an R ... you've now got an R 3rd gearset (not 4th). Flipping the ZD and N gearsets does work as you suggest.


(IMG:style_emoticons/default/agree.gif)

you can flip 3rds to 5th's and 2nd gears to 4th gears.... no intermingling allowed.
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