Tire Height - The 1947 - Present Chevrolet & GMC Truck Message Board Network

LuckyHenriksen · 12-13-2008, 06:29 PM

If I am running a 3:73 gear and a TH400 with a 4500 stall, how tall of a tire should I run? I am looking to buy a set, I drive a lot on the street, but would like to hit the track. Any opinions on what brand/type?

Super73 · 12-13-2008, 07:01 PM

There are a few things to consider.

Pros:
Height helps to hook
Height typically last longer as to go the same distance, you need less revolutions (Assuming the same gear ratio is used)
Height brings freeway rpm down

Cons:
With out the right gear, your set up is not optimized and you might not be running to your full potential (ET)
With out a lock up converter, too tall of a tire may keep you slipping the converter some and creating heat.

But I'd think a 26" or a 28" would be ok.

LuckyHenriksen · 12-13-2008, 07:46 PM

OK thanks, I am trying to find a set for now, I need some wider ones to fit my new wheels. Will look for some 28'' ones.......

68 C-10 KID · 12-13-2008, 08:59 PM

Quote:

Originally Posted by LuckyHenriksen

OK thanks, I am trying to find a set for now, I need some wider ones to fit my new wheels. Will look for some 28'' ones.......

With the 28" and the 3:73 Ratio you can cruse freeway speeds any where you want no problem. With that big of converter I recommend running a big trans cooler and never run it through the radiator, that's hot all ready.
@ the track its going to be a little piggish till it gets on top of the

the optimum set up i like to see is a 4:30 w/ a 28"

Super73 · 12-13-2008, 10:43 PM

Gear tire combo for the track is relative to max RPM IMO. There is no perfect one stop gear/tire combo.

But yeah, make sure you have a decent trans cooler.

djracer · 12-16-2008, 11:54 AM

I ran a mickey thompson sportsman pro that was 12.5x28 with a 3.73 in my old street truck with just a decent 350/350 and it worked well on and off the track.

LuckyHenriksen · 12-16-2008, 09:36 PM

Allright thanks for the replies guys. It would really be nice to cruise the freeway at least semi-comfortably.

12-13-2008, 06:29 PM	#1
LuckyHenriksen Registered User Join Date: Oct 2007 Location: Sherwood Oregon Posts: 1,908	Tire Height If I am running a 3:73 gear and a TH400 with a 4500 stall, how tall of a tire should I run? I am looking to buy a set, I drive a lot on the street, but would like to hit the track. Any opinions on what brand/type? __________________ 1968 Yenko Chevy LWB 6.0L/TH400 3/4 Drop Senior Project Build Thread Here

12-13-2008, 07:01 PM	#2
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: Tire Height There are a few things to consider. Pros: Height helps to hook Height typically last longer as to go the same distance, you need less revolutions (Assuming the same gear ratio is used) Height brings freeway rpm down Cons: With out the right gear, your set up is not optimized and you might not be running to your full potential (ET) With out a lock up converter, too tall of a tire may keep you slipping the converter some and creating heat. But I'd think a 26" or a 28" would be ok. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

12-13-2008, 07:46 PM	#3
LuckyHenriksen Registered User Join Date: Oct 2007 Location: Sherwood Oregon Posts: 1,908	Re: Tire Height OK thanks, I am trying to find a set for now, I need some wider ones to fit my new wheels. Will look for some 28'' ones....... __________________ 1968 Yenko Chevy LWB 6.0L/TH400 3/4 Drop Senior Project Build Thread Here

12-13-2008, 10:43 PM	#5
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: Tire Height Gear tire combo for the track is relative to max RPM IMO. There is no perfect one stop gear/tire combo. But yeah, make sure you have a decent trans cooler. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

12-16-2008, 11:54 AM	#6
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,891	Re: Tire Height I ran a mickey thompson sportsman pro that was 12.5x28 with a 3.73 in my old street truck with just a decent 350/350 and it worked well on and off the track. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

12-16-2008, 09:36 PM	#7
LuckyHenriksen Registered User Join Date: Oct 2007 Location: Sherwood Oregon Posts: 1,908	Re: Tire Height Allright thanks for the replies guys. It would really be nice to cruise the freeway at least semi-comfortably. __________________ 1968 Yenko Chevy LWB 6.0L/TH400 3/4 Drop Senior Project Build Thread Here



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