Tire Diameter for 1/4 mile best times?

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

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

Quote:

---

Originally Posted by 2boostedSilverado

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?

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.

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.

Quote:

---

Originally Posted by 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.

---

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

probably... don't go to track...don't have 4wd on this truck...could care a less

Quote:

---

Originally Posted by 2boostedSilverado

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....

Quote:

---

Originally Posted by casey23

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

With a 4L60e 3.73 and 30.5" (285/60/17) tire diameter I trap ~4900rpm in 3rd. To really eek out a bit better time I should be running a slightly smaller diameter but would have to make them 4 DR's to get any traction at launch ;)