Tire and Gear Differences 3.91 to 4.10 - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech Tire and Gear Differences 3.91 to 4.10

Print Thread

Tire and Gear Differences 3.91 to 4.10 #433624 08/10/09 10:35 AM 08/10/09 10:35 AM
Joined: Jan 2003 Posts: 4,288 Danville, NH M Mopar_Mike OP master
Mopar_Mike OP master M Joined: Jan 2003 Posts: 4,288 Danville, NH	I have 3.91 gears and run a 27" tire. I am going through the trap at 109mph and 6200 and have a 1.7 60' time. (Leaving out converter slippage and keeping it constant for this equation) if I switch to 4.10 gear and use a 28" tire what changes should I expect? I am not thinking much?? Thanks. RS23L7 4-Speed

Re: Tire and Gear Differences 3.91 to 4.10 [Re: Mopar_Mike] #433625 08/10/09 10:41 AM 08/10/09 10:41 AM
Joined: Jul 2006 Posts: 4,595 On the south side of Nowhere S S/ST 3040 master
S/ST 3040 master S Joined: Jul 2006 Posts: 4,595 On the south side of Nowhere	Quote: I have 3.91 gears and run a 27" tire. I am going through the trap at 109mph and 6200 and have a 1.7 60' time. (Leaving out converter slippage and keeping it constant for this equation) if I switch to 4.10 gear and use a 28" tire what changes should I expect? I am not thinking much?? Thanks. Current driveshaft speed is 5303.7 RPM With 4.10s and 28" tire......5362.8 RPM

Post deleted by Defbob [Re: Mopar_Mike] #433626 08/10/09 10:43 AM 08/10/09 10:43 AM
A Anonymous Unregistered
Anonymous Unregistered A

Re: Tire and Gear Differences 3.91 to 4.10 #433627 08/10/09 12:32 PM 08/10/09 12:32 PM
Joined: Jan 2003 Posts: 4,288 Danville, NH M Mopar_Mike OP master
Mopar_Mike OP master M Joined: Jan 2003 Posts: 4,288 Danville, NH	I was thinking more along the lines of the 60' time. Will the gear change help reduce my 60' thus reflecting a lower ET? RS23L7 4-Speed

Re: Tire and Gear Differences 3.91 to 4.10 [Re: Mopar_Mike] #433628 08/10/09 01:06 PM 08/10/09 01:06 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: I was thinking more along the lines of the 60' time. Will the gear change help reduce my 60' thus reflecting a lower ET? Well with the larger tire you will have a bigger foot print and the gear gives you a touch more torque multiplication

Re: Tire and Gear Differences 3.91 to 4.10 [Re: MR_P_BODY] #433629 08/10/09 02:57 PM 08/10/09 02:57 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	if both combos dead hook about .003 faster 60 foot and a couple hundereds in the quarter. your only making a 1% change doing both at once. Gear is 5% higher but - the 4% higher tire = 1%!

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1