 Taller final drive ratio available? |
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| Mid_Engine_914 |
 Dec 30 2006, 05:16 PM
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Member  Group: Members Posts: 195 Joined: 22-September 06 From: Left Coast Member No.: 6,888  |
I was looking through the PET catalogs for the early 911/912s and later 911s and saw that there is a ring gear and pinion shaft listed with a ratio of 7:27 or 3.857:1 which is taller than the 914's stock 7:31 (4.429:1) ratio. Will this ring gear and pinion shaft work in the 914's 901 tranny?
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| brant |
Jan 5 2007, 12:52 PM
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914 Wizard Group: Members Posts: 11,952 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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YES... The ring and pinion gearing can be changed in a 901 box.
its not however cheap. The lash will need to be reset. figure 500$ plus parts. here lies the problem with a 901 box on a V8 (IMHO) yes it will work. but you'll spend 3 grand rebuilding it. more if you change the ring and pinion or add a limited slip Once you make a serious $5,000 commitment on your transmission how long do you want it to last? you can get away with them if you avoid 1st gear and do 2nd gear starts. (many V8 guys lock out first gear) but after you decided to drop 5grand into the tranny you will need to consider if you should be spending that same money on a bigger model that will last longer and take the abuse better. thats what is not being said above in this thread and the reason people are replying to you with such strong terms. brant |
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Posts in this topic
Mid_Engine_914 Taller final drive ratio available? Dec 30 2006, 05:16 PM
Crazyhippy i know 8:31 has been done, not sure what trans it... Dec 30 2006, 05:30 PM
Mid_Engine_914 I'm hoping to put a VR6 in my car this year an... Dec 30 2006, 06:22 PM Crazyhippy and the 1st time you try to duplicate those #... Dec 30 2006, 07:01 PM Mid_Engine_914 Those acceleration numbers were based on a 4000 rp... Dec 30 2006, 08:28 PM Mueller
that makes me laugh and wonder after how many mi... Dec 30 2006, 08:49 PM Crazyhippy 4000rpm launch on sticky street tires...
Thanks f... Dec 30 2006, 08:41 PM Mid_Engine_914 So I guess you don't recommend that people use... Dec 30 2006, 08:50 PM Mueller
So I guess you don't recommend that people us... Dec 30 2006, 08:55 PM scott thacher
So I guess you don't recommend that people u... Dec 30 2006, 08:58 PM Mueller
[quote name='Mueller' post='840263' date='Dec 30 ... Dec 30 2006, 09:04 PM Crazyhippy depends on the appliction, ther are NO 2 v-8 cars ... Dec 30 2006, 09:00 PM Mid_Engine_914 No problem, I changed it to a 1500 rpm launch (eve... Dec 30 2006, 09:00 PM Crazyhippy i'm traction limited :D
Also have another tra... Dec 30 2006, 09:10 PM Mid_Engine_914 I just changed it back to an open diff. (no posi) ... Dec 30 2006, 09:12 PM Crazyhippy You have a few People that have done this before w... Dec 30 2006, 09:14 PM Mid_Engine_914 You may be right but the information on Renegade... Dec 30 2006, 09:40 PM jmmotorsports I bought a 911 sportomatic transmission a couple m... Dec 31 2006, 08:48 AM Mid_Engine_914
I bought a 911 sportomatic transmission a couple ... Jan 5 2007, 10:45 AM jmmotorsports Jerry, so the 7:27 ring and pinion is a bolt-in re... Jan 5 2007, 09:19 PM topatrout914 My first 914 was a 1970 with D-jet and I sheared t... Jan 5 2007, 11:22 AM Mid_Engine_914 I appreciate the feedback. The turbo kit is just a... Jan 5 2007, 10:42 PM |
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