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andy2166 Samba Member
Joined: March 22, 2012 Posts: 8 Location: naples, florida
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Posted: Sun Apr 01, 2012 9:37 am Post subject: gear ratio |
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I have a 68 4 speed trans on my rail with n50 15 tires on the back. I want to change the rear tires to slighly narrower time and tires. If I go taller do I sacrifice HP and torque? It seems like first gear is geared low anyway....[/i] |
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Mal evolent Samba Member
Joined: March 31, 2009 Posts: 2912 Location: San Antonio, Nuevo Mexico
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Posted: Sun Apr 01, 2012 12:31 pm Post subject: |
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not real clear on what you're asking, so I will just tell you what is available instead.
chances are you have 4.125s in a 68 trans.
next NUMERICAL step up: 4.375. IMHO not much change for the expense
there are aftermarket 4.86s, which look weak to me. and some freak show 5.14s in the classifieds. that's it for T1 boxes
if you want 4.57, 4.86 ( robust ) or 5.38s, you need a bus box.
going the other way: you have 3.88s and 3.44s as your remaining choices. _________________ 73 Beetle Baja, Ghia front brakes, Type 3 rear brakes, 2220 ( 94 X 80 ), Weber Progressive, Bosch SVDA, '97 Mustang seats
Baja Bugs for Volkswagen Virgins: Index |
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larryvance66 Samba Member
Joined: January 27, 2009 Posts: 731 Location: Virginia
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Posted: Sun Apr 01, 2012 5:29 pm Post subject: |
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I'm running 31's on a 4:12 tranny. Pulls real nice but a little higher in first than I'd like at times. I have a 1835 but I don't expect it makes much more than 80-90 H.P. tops. _________________ I got a Volkswagen for my wife....Best trade I ever made! |
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larryvance66 Samba Member
Joined: January 27, 2009 Posts: 731 Location: Virginia
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Posted: Sun Apr 01, 2012 5:29 pm Post subject: |
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I'm running 31's on a 4:12 tranny. Pulls real nice but a little higher in first than I'd like at times. I have a 1835 but I don't expect it makes much more than 80-90 H.P. tops. _________________ I got a Volkswagen for my wife....Best trade I ever made! |
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KopfenJager Samba Member
Joined: December 09, 2011 Posts: 582
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Posted: Sun Apr 01, 2012 9:56 pm Post subject: |
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Yeah not a lot of info on what your running. Tires can effect you final derive a lot, especialy with a little engine like our VW's.
You can go 4.86 in your car box and they can last, but for the expense of opening up the tranny and having it done right, you could swap in a bus box. A bus box would be a lot stronger and allows you to goto 5.38 and they are a stronger gear compared to a car box 4.86. |
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