| From | Message |
Dex
Dodge Dakota
JOIN HERE
11/26/2005
10:11:58
|
 Subject: Torque & Tire Size Question
IP: Logged
Message:
I was thinking about how to improve towing with my 3.9L. It has a torque rating of 225 with the 31x10.5 tires and 3.55 gears
Would the torque go up with smaller tires? If so is there a formula or site that could give me an idea of the increase in torrque I would get with a smaller tire.
txs
2000 Quad Cab 4X4-Sport V-6 Automatic Sports Plus Package
31X10.5 tires, Limited Slip, 3.55 Gears, Trailer Tow Group, HD Package, LineX Spray in bed liner; Added:Airaid air filter & heat shield, Flowmaster 3 chamber muffler, Steel Horse Torneau cover, front hitch, Autolite Double Platinum 3923 Plugs, Removed air horns from Throttle Boddy, added new TB bolts, Cool Tape around air filter and A/C tubes, Amsoil in: crank case, differential and tranfercase.
|
Joe M.
Dodge Dakota
JOIN HERE
11/26/2005
10:22:54
|  RE: Torque & Tire Size Question
IP: Logged
Message:
cant remember the exact formula
but someone in the tech. dept of summit or jegs should be able to help you
however i can tell you without a doubt, going with smaller tires is like a lower gear ratio
dont think you'de notice a big difference with 1 size but i know 2 sizes on my old 83 ramcharger made a noticable diff.
(hope that helps)
|
Dex
Dodge Dakota
JOIN HERE
11/26/2005
10:36:24
| RE: Torque & Tire Size Question
IP: Logged
Message:
I found this calculator.
http://www.4lo.com/calc/geartire.htm
I don't understand it. If I put in a new diamiter of 34 and an old diamiter of 33 with a gear ratio of 3.55 the gear ratio on the right get better.
I'm confused.
Any explanations would be helpful.
txs
|
daddio
Dodge Dakota
JOIN HERE
11/26/2005
12:47:24
| RE: Torque & Tire Size Question
IP: Logged
Message:
you will always have 225 ftlbs of torque unless you modify the engine. now if you go from 31" tires to 235/75 it would probably be like going from 3.55:1 to 4.10:1
|
Roy
Dodge Dakota
JOIN HERE
12/31/2005
12:09:02
| RE: Torque & Tire Size Question
IP: Logged
Message:
I have the same truck but mind has a 3.92 rear end and with the Super Chips reprogrammer, it pulls my 3800lb boat find. Try a lower gear ratio for trailer pulling.
|
prodak
Dodge Dakota
JOIN HERE
12/31/2005
13:35:57
| RE: Torque & Tire Size Question
IP: Logged
Message:
I agree with daddio. Keep your 3.55 LSD and go to the 235/75 - it's also the shortest tire you can get in a C load range (I think).
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
