26" DR and gearing???????

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Jan 30, 2012 | 11:48 AM

AChotrod

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26" DR and gearing???????

Looks like I might be racing in an event that requires a 26" Drag radial. My question is what would be the best rear gearing for a 3500lb car, th350 trans, approx 750rwhp on a 26" Drag radial???? Thanks this race has a BIG payout and I want to win!!!!!!!!!!!!

Jan 30, 2012 | 12:21 PM

Detroitmuscle

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From: Shelby Twp.

what rpm are you shifting at? I'd say 3.73 if you have enough gear for your estimated traps.

Jan 30, 2012 | 12:44 PM

AChotrod

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Should be shifting at 7-7100 with the new engine going in.

Jan 30, 2012 | 01:45 PM

SMOKY

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3.73 would put you topping out around 140 depending on converter. Have fun at the jr

Jan 30, 2012 | 05:10 PM

AChotrod

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Thanks! Got some work to do so We'll see how it plays out. Havent looked at the car all winter.

Jan 30, 2012 | 06:43 PM

zracer323

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You need to find your convertor slip percentage before you can calculate trap rpm. There is a calculator on tci.com that works pretty good.

Jan 31, 2012 | 03:50 PM

AChotrod

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Thanks! Ill check that out.

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Feb 1, 2012 | 02:08 PM

AChotrod

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Alright I need some more help here. How do I figure this out for a new combo? I know approx HP, Weight, tire height and RPM as mentioned just not which gear to go with. Im thinking 3.55 or 3.73 but how can I do this without testing both? New to figuring out TC slip and all that. Always raced with a T56 in the past.

Feb 1, 2012 | 03:11 PM

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xpndbl3

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Can't figure converter slip out until you run the car

3.55 or 3.73 is around a 200 rpm difference so....

Feb 1, 2012 | 07:35 PM

#11

AChotrod

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I know... thats what sucks. The 4.10s are no good so I need to knw what I should put in.

Feb 1, 2012 | 09:48 PM

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TravisMcGill2000

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From: chats,ga

Do 3.73s now if it to much then u can always swap it.. How much u got to that animals running.

Feb 1, 2012 | 10:28 PM

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xpndbl3

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Just spin her the extra 200 if needed

Wish I could bring enough to that race, but I'm about 500hp short lol

Feb 1, 2012 | 10:37 PM

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SMOKY

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if you talk tto who made your converter they should be able to give you a close estimate of what your slip will be

Feb 2, 2012 | 01:29 PM

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AChotrod

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Ill call Bubba over at BTE before I buy the new gear set.

Xpndbl3 My Stock *** PCM it at its limit at 7200. Cant get a clear answer of what happens after that. What do you mean 500 extra HP? lol Pretty sure your car has just as much if not a better chance to win than mine.

Feb 2, 2012 | 01:43 PM

#16

xpndbl3

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Quote:

Originally Posted by AChotrod

Xpndbl3 My Stock *** PCM it at its limit at 7200. Cant get a clear answer of what happens after that. What do you mean 500 extra HP? lol Pretty sure your car has just as much if not a better chance to win than mine.

Ya my rev limiter is set at 7300, I know the MSD carb box will go to 7500 I think before the crank signal screws up. Definitely 500 extra hp, there will be cars making 200 crank hp more than me easily and then hitting them with 300 shots I'm sure. I don't have a beast of a car like you, mine is a nice cruiser that happens to win car shows here or there. Nothing crazy on this thing.