AChotrod

iTrader: (17)

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!!!!!!!!!!!!

Detroitmuscle

iTrader: (16)

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

AChotrod

iTrader: (17)

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

SMOKY

iTrader: (4)

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

AChotrod

iTrader: (17)

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

zracer323

iTrader: (12)

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.

AChotrod

iTrader: (17)

Thanks! Ill check that out.

joelster

My loose converter was good for MAYBE 130mph with a 26" tire with 3.73's at 7k. Just some food for thought.

AChotrod

iTrader: (17)

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.

xpndbl3

iTrader: (23)

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

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

AChotrod

iTrader: (17)

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

TravisMcGill2000

iTrader: (2)

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

xpndbl3

iTrader: (23)

Just spin her the extra 200 if needed Wish I could bring enough to that race, but I'm about 500hp short lol

SMOKY

iTrader: (4)

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

AChotrod

iTrader: (17)

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.

xpndbl3

iTrader: (23)

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.

GIMPY02

3.73 is what id go with... what converter are u running?

BADHAWK51

iTrader: (1)

Mike it looks like you will be fine with 3:73's


I used this calculator from Wallace racing.


http://www.wallaceracing.com/dragcalcquarter.php

AChotrod

iTrader: (17)

Thanks Jeff. Pretty sure Im going with 3.73s and just remove the rev limiter and let it ride on the top end if needed

Sofls1

iTrader: (16)

I saw that race. Looks like fun. I thought about entering, but that's too far to travel for me to bring a knife to a gun fight. Good Luck!