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Old 03-13-2015, 12:42 PM
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Sieg Sieg is offline
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Quote:
Originally Posted by Nativefx View Post
Hi Sieg, my combination will be pretty close to the same once I get finished so i'm interested in your thoughts about the 3:73 gearing in the rear? Do you still find your able to actually use 6th gear? Here in OR the speed limit on the highway is still 55 but for my purposes I'm going to consider 60-65 mph as that's normally the speed people drive on the highways.

I'm building my car to drive, so even with a 480-500hp LS3 motor, close ratio T56 Mag and 9" rear end, I'd still like it to be fun around town but also useful on the highway for longer trips over 5 hrs. I had considered 3:42 but I don't think that would be very useful for 6th gear very often. I think I should be considering 3:73 or 3:89 to give me the best overall?

Obviously I'm worried about gear whine, so I've been trying to research the best options for either of these as well. I'm seeing mixed reviews of the Motive gear sets, but also understand most consider the ones made in Italy to be better? Until Blakes earlier comment I hadn't heard anyone mention US Gear, so I'll have to do some research on them as well.

Appreciate all the input available through the forum!
I was cruising a little yesterday 70-80 at 2000-2200 in 6th with a 26.5" rear tire and it's perfect, even with my horribly inferior Holley Ultra XP carb and Gen1 SBC. Around town 35 mph in 3rd gear is 2400ish rpm.

Road speeds at typically 55-65 and 65-75 around here so 5th and 6th are

Tire diameter is a critical factor!

My Motive's are silent, but as mentioned that could have a lot to do with who set them up. Blake has a lot more rear end experience than I.
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