Tire Diameter for 1/4 mile best times?

[2boosted]

I want to change the 24" for somo 16" for racing with some 235-60-16

Someone have Experience with this diameter in 1/4 mile?

I have 3.73 and run in 4hi

[pl4yboy]

235/60 is pretty narrow. 325/60 maybe?

[txarkitekt]

I want to change the 24" for somo 16" for racing with some 235-60-16

Someone have Experience with this diameter in 1/4 mile?

I have 3.73 and run in 4hi

I am with Justin. 235mm is waaaaay too skinny for what you are needing. Being 4WD, I would go with at least a 265/60. And you are switching from 4HI to 2HI after the 1-2 shift, right?

[2boosted]

I'm looking for the best diameter of tire&wheel for the best 1/4 mile time. I put a single pass yesterday with the 24x10 on 315-35-24 and did a 12.5 sec but I ended like 45xx rpm wich is not my torque sweet point. I will like to pass traps at 5500 rpm. I have a 3.73 and I dont disconect 4x4. My tire wheel combo net 32.5 diameter, and are way too heavy one pice rim. I'm on low boost now, 8 psi, waitting for my fuel system so I can raise boost. Meanwhile, I want to hit low 12 with just a tirewheel swap. Possible? Also I can strip the interioi for some weigth savings.

[casey23]

I'm looking for the best diameter of tire&wheel for the best 1/4 mile time. I put a single pass yesterday with the 24x10 on 315-35-24 and did a 12.5 sec but I ended like 45xx rpm wich is not my torque sweet point. I will like to pass traps at 5500 rpm. I have a 3.73 and I dont disconect 4x4. My tire wheel combo net 32.5 diameter, and are way too heavy one pice rim. I'm on low boost now, 8 psi, waitting for my fuel system so I can raise boost. Meanwhile, I want to hit low 12 with just a tirewheel swap. Possible? Also I can strip the interioi for some weigth savings.

U need to do some math only .. with rpm calulator..... u have run some good numbers on your big wheels... I have a buddy runs 14flat on 22's with 5.3 .... swaps to slicks and 2wd.... 13.15....

[2boosted]

U need to do some math only .. with rpm calulator..... u have run some good numbers on your big wheels... I have a buddy runs 14flat on 22's with 5.3 .... swaps to slicks and 2wd.... 13.15....

Caesy, when you say slick, by them self could shave .5 imo

What size the slicks?

The 12.59 @ 8 psi might sound good, but the truck feels at mid pull at the end.

My target is with this street set up low 12, 12.2 will be nice, but I just upgraded my brakes, and they say nothing under 20" rims, so now I have less options.

Some said 27" diameter was the best

[casey23]

Caesy, when you say slick, by them self could shave .5 imo

What size the slicks?

The 12.59 @ 8 psi might sound good, but the truck feels at mid pull at the end.

My target is with this street set up low 12, 12.2 will be nice, but I just upgraded my brakes, and they say nothing under 20" rims, so now I have less options.

Some said 27" diameter was the best

My guy runs 31' street tires... and 29.5" slicks... this is on a low power truck best .60 foot is 1.85 on the bottle.... he is in the 2.2X with street tires... My truck is fastest in high gear then any other.... no matter my .60 foots my trucks lazy in the front half of the track... and I cross the traps in 6000 range... I think smaller tire is going to help me alot also....

[2boosted]

I cross the traps in 6000 range... I think smaller tire is going to help me alot also....

Damn dude, what diameter tires, want to pass at those rpm the traps !!!!!

[oleshifty]

I would imagine killing 4wd after 2nd gear would put you closer to 12's by itself. That's a lot of extra mass to turn the entire 1/4...there's a reason drag cars are 2wd.


4hi is only rated at like 65mph, so you are putting A LOT of stress on it, but if that's what you want to run, you will need to have the speed you trap at, then use a online calculator of rear gear/trans gear/tire size/etc to figure it out. I'm guessing you need to lose about 1-1.5 inches on your diameter to gain a 1000 rpm trap.

[pl4yboy]

I would imagine killing 4wd after 2nd gear would put you closer to 12's by itself. That's a lot of extra mass to turn the entire 1/4...there's a reason drag cars are 2wd.


4hi is only rated at like 65mph, so you are putting A LOT of stress on it, but if that's what you want to run, you will need to have the speed you trap at, then use a online calculator of rear gear/trans gear/tire size/etc to figure it out. I'm guessing you need to lose about 1-1.5 inches on your diameter to gain a 1000 rpm trap.

Did you just skip the 10 page thread we had about this?