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Author
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Topic: rear end gears
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Jay302
Journeyman Posts: 36
From: Louisville,ohio
Registered: Dec 2004
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posted 12-26-2004 06:58 PM
   
i got my new ladder bars for x-mas and getting ready to start installing my 9"rear end with detroit locker,and coil overs i plan on using 26"tall tires with some street driving.do you recomend 3.89 or 4.11 gears? it is a very light car (i know the car is not ford but its fun) thanks for any advice Jay------------------
77 triumph tr-7 with a ford 302,c-4,and soon to have a 9"rear end
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jsracingbbf
Gearhead Posts: 2898
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 12-26-2004 07:51 PM
jay I think Richmond's web site has a rear gear calculator on it. and Welcome to M & M
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JS
"never submit yourself to scientific tests no matter how bad you need the money, for all you know they could have erased your memory and YOU WERE REALLY SOMEBODY BEFORE"
69 Mustang Pro ET Drag
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RogueS
Journeyman Posts: 71
From: Wichita, KS, USA
Registered: Oct 2004
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posted 12-27-2004 12:03 PM
You plan on running this down the strip? How high are you planning on revving the motor?
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Jay302
Journeyman Posts: 36
From: Louisville,ohio
Registered: Dec 2004
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posted 12-27-2004 12:19 PM
ya i plan on racing it and want to go through the lights around 6500rpm.i ran it with the stock rear end (we have no idea what the gears are)it ran 14.0 at 99mph with tons of tire spin. ------------------
77 triumph tr-7 with a ford 302,c-4,and soon to have a 9"rear end
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steve'66
Gearhead Posts: 9476
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 12-27-2004 12:33 PM
With 26" tall slicks and an automatic, you'll need 4.56 gears and a loose converter to hit 6500 thru the traps at 100-105 mph.4.11 would be a good compromise street gear. Good luck, SteveW
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Tom G
Gearhead Posts: 723
From: Bethlehem, Pa USA
Registered: Nov 2001
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posted 12-27-2004 01:05 PM
Car only weighs about 2600 right? 3400 converter with 411 or 456 should be a high 11 piece. Sounds like a fun car to drive------------------
67 Mustang F/B 302 GT-40X FMS engine RPM Air Gap 600 Holley ceramic coated headers T5, cable clutch Flows X Pipe 3.89 9". Clearwater Aqua GT Clone Vintage40 series 16X8 225 front 255/50 rear drag radials 13.25 @ 103mph 88 GT 5 spd new project 77k original miles Red and Silver
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Jay302
Journeyman Posts: 36
From: Louisville,ohio
Registered: Dec 2004
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posted 12-27-2004 10:22 PM
thanks i have a 2200convertor in it now dont really feel like changing it yet.ill prob end up with 4.11 gears in it i just hope the car it self can handle it we are going to reinforce it a little bit but i guess we will find out soon enough. thanks everyone Jay------------------
77 triumph tr-7 with a ford 302,c-4,and soon to have a 9"rear end
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steve'66
Gearhead Posts: 9476
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 12-27-2004 10:51 PM
quote:
Originally posted by Jay302:
thanks i have a 2200convertor in it now dont really feel like changing it yet.ill prob end up with 4.11 gears in it i just hope the car it self can handle it we are going to reinforce it a little bit but i guess we will find out soon enough. thanks everyone Jay
Ray, Time to install a roll cage and loosen up the converter. You do want to be quick, right?  Have fun, SteveW
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 12-28-2004 04:27 PM
The upside to 4.11 gears is that they are the cheapest to buy for a 9 inch. ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,& '04
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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