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09-09-2013, 04:18 PM | #1 |
Junior Member
Join Date: Sep 2013
Location: St. Louis MO
Posts: 5
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Rear end differential
Hey guys,
Just bought a stock 31 tudor sedan to use as an everyday driver, but im not sure what to do to make her highway worthy. I have seen the mitchell overdrive, but not really wanting to spend the money. I have also heard about just changing the rear end diff. (Probably what im wanting to do) to get a lower rpm on the highway. Any thoughts or experiences would be greatly appreciated. Also, I have been looking at the webber 2 barrel carb, vs a 2 port intake that I can bolt up two zenniths onto. Thoughts again are welcome. Thanks, Brian |
09-09-2013, 06:11 PM | #2 |
Senior Member
Join Date: Nov 2011
Location: B.C. Canada
Posts: 1,746
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Re: Rear end differential
If you live in an area with very few hills,you could install 3-27 gears.If in hilly country,3-54 gears would be a good choice.
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09-09-2013, 06:16 PM | #3 |
Senior Member
Join Date: May 2010
Location: ca.
Posts: 2,522
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Re: Rear end differential
the weber + header + 3:54 will work well . electronic self advance dist will also make it ez to drive daily ................
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09-09-2013, 08:49 PM | #4 |
Senior Member
Join Date: May 2010
Location: Alabama
Posts: 8,099
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Re: Rear end differential
The first modification should be a higher compressioin head. I wanted a period correct look. I was lucky enough to find a cast iron dual updraft Trojan intake manifold. I run a pair of B Zenith carbs. I believe that the two mods that will make the most noticable performance increase is a higher compression head and a lightened flywheel. I could notice the boost that I got with a Flame trhrower coil and a gutted muffler.
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09-09-2013, 09:41 PM | #5 |
Junior Member
Join Date: Sep 2013
Location: St. Louis MO
Posts: 5
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Re: Rear end differential
Thanks for the input guys. Where are you finding these parts at? All I seem to be able to find are original parts...no performance stuff.
Thanks, Brian |
09-09-2013, 11:22 PM | #6 |
Senior Member
Join Date: May 2010
Location: St Charles , Missouri
Posts: 1,998
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Re: Rear end differential
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Good luck! Larry Shepard St. Charles, MO |
09-09-2013, 11:36 PM | #7 | |
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Join Date: May 2010
Location: Southern California
Posts: 3,131
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Re: Rear end differential
Quote:
I fully agree with your suggestion. I think it is the best combination for highway driving. I would also add a six volt positive ground alternator to keep the battery fully charged and to prevent overcharging it. A Mitchell is a 26% overdrive and with a 378 ring & pinion it can easily tackle most driving situations. Second gear overdrive can easily overcome any grade you cannot climb in high gear. I have a 23% Ryan in my Vic along with a 5.5 Snyder head. The rest is as Henry delivered it, except for the alternator. I drive it all over the place, including long distant tours. Tom Endy |
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09-09-2013, 11:56 PM | #8 |
Senior Member
Join Date: May 2010
Location: St Charles , Missouri
Posts: 1,998
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Re: Rear end differential
Tom,
I forgot that one... I've been a die hard generator guy for all these years but ran a alternator on the Blue Ridge tour... and it did well. It was a pinch hit right before I left as my generator was giving me grief. Had one in the shop so I used it, and stil have it on. Hey, by the way... I'm doing a seminar on tools, homeaid, KRW, and tools currently available through the suppliers at the MARC membership meet next spring. I'd like to pick your brain on stuff you've built/used. I'm a KRW junkie but have a number of small home built stuff as well. I'll drop you a PM and maybe we can hook up. Thx. larry Shepard |
09-10-2013, 12:45 AM | #9 |
Junior Member
Join Date: Sep 2013
Location: St. Louis MO
Posts: 5
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Re: Rear end differential
Thanks for the input guys but qn overdirve is out of my price range. Anyone know where to buy the differential gearing?
Thanks, Brian |
09-10-2013, 12:51 AM | #10 |
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Rear end differential
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