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-   -   Need a set of track tires (http://www.ramforumz.com/showthread.php?t=118209)

CdnoilRAM 07-30-2012 02:41 AM

Need a set of track tires
 
I'm in need of a set of track only rubber. I ran this weekend and with the NT420S, the only way I was getting traction was getting through 1st gear then spraying, or running in 4x4. My all motor pass was 15.02 and my best 100 shot pass was 14.79, quite a disapointment with the nitrous, plus DA was in the 4600s all night. I am spraying right off the line since my window switch is giving me troubles and I plan to keep it this way since I'm trying to move 5900lbs

I don't want to keep making passes in 4wd because it's just killing my times and I do worry about my transfer case in the long run, so I'm in need of some traction to hook in 2wd. I know there was just a thread about rubber, but I've been looking at the M&H DRs in the 275/50R17 and picking up a set of stock 17s wheels to mount them on.

Thoughts?

Do I need to find a set of tires the same diameter for the front in order to run properly without messing around with my front end?

snrusnak 07-30-2012 09:17 AM

As long as you stay in 2wd you shouldn't have to worry about the front, right?

Darkknight3829 07-30-2012 10:53 AM

hey man i have some ALREADY mounted wheels and radials your looking for. bolt circle on the wheels is 5-5 1/2 17x9's. The tires are Mickey Thompson 26 x 11.50R17. I may consider selling. Ive made 12 passes with the radials. no road mileage so these are practically brand new.

http://i134.photobucket.com/albums/q.../ModThread.jpg

http://i134.photobucket.com/albums/q...modthread3.jpg

Calebbrown 09-18-2012 10:49 AM

I like those wheels alot did you end up selling them?

HEMI450HP 09-18-2012 06:00 PM

I just saw this thread. Kurtis, did you end up getting a set of DR's? I really like the M&H's myself. I ran their 3 major 17" sizes...275/50/17, 325/45/17, and the 390/40/17's. I personally liked the 325's the best, but for a high 12 second or slower truck, the 275's are good enough...assuming you have caltracs or some other form of traction aid. Tires will make a big difference, but as you start going faster, it is going to take some suspension upgrades to get even the drag radials to stick.

CHVYKLR 09-18-2012 08:05 PM

subscribing. sorry I missed this thread.

Kurtis, if you find an aluminum set of four 17s and they aren't willing to seperate I'll buy 2 of 'em.

UNBROKEN 09-18-2012 09:31 PM

Just launch it in 4wd. We've been doing it for years with the diesels.
Drive around the water, throw it in 4wd, load up the converter and let it eat.
Disengage 4wd at the end of the track.

Your 1/4 mile times are dictated by the first 60'...everything after that is just steering it straight. You have traction built in...use it.

KarateManAZ 09-19-2012 02:43 AM

I run 28" Hoosier slicks. They haven't done me wrong since I got them!

CdnoilRAM 09-19-2012 12:17 PM

Quote:

Originally Posted by HEMI450HP (Post 891779)
I just saw this thread. Kurtis, did you end up getting a set of DR's? I really like the M&H's myself. I ran their 3 major 17" sizes...275/50/17, 325/45/17, and the 390/40/17's. I personally liked the 325's the best, but for a high 12 second or slower truck, the 275's are good enough...assuming you have caltracs or some other form of traction aid. Tires will make a big difference, but as you start going faster, it is going to take some suspension upgrades to get even the drag radials to stick.

Never ended up getting any. Started my own consulting company and just waiting for the cash flow to catch back up right now. Plus, been working a new contract so much lately that I've missed all the track days and I won't see the track again until October, and they normally close down mid-october, so I may not see another pass this year.

The winter mods will be making some big differences once I get the cash to carry on. Will be doing Lakewood cal-tracs, D-Rs, and adjustable remote gas shocks so I can soften them up when I'm racing. I'll also be doing a shaft loop as it's a requirement for my track at 13.99 or faster, or if I launch in 4wd I'll have to rig a half-shaft loop because they've had too many 4wds go wrong and score up the launch pad.

Quote:

Originally Posted by CHVYKLR (Post 891870)
subscribing. sorry I missed this thread.

Kurtis, if you find an aluminum set of four 17s and they aren't willing to seperate I'll buy 2 of 'em.

Will do, Right now I'm thinking I may just pick up a set of light weight 17" wheels for the rear and 18" for the front, the 22s weigh a TON! The 18" to clear the SSBC big brake kit I've been eyeballing for a while.

Quote:

Originally Posted by UNBROKEN (Post 891975)
Just launch it in 4wd. We've been doing it for years with the diesels.
Drive around the water, throw it in 4wd, load up the converter and let it eat.
Disengage 4wd at the end of the track.

Your 1/4 mile times are dictated by the first 60'...everything after that is just steering it straight. You have traction built in...use it.

You hit it on the head... with the diesels. With the torque they put down they can launch in 4wd and still pull good 60' times, unfortunately, the gas engines just don't put down a high enough torque to compensate. The transfer case attached to the 68rfe is also a lot beefier and can handle being shifted out of 4wd at WOT to reduce the drrivetrain losses. The TC on the 545rfe is woeful and even around the 500hp mark you have a good chance of stripping input shafts if you try to shift out at WOT.

As for running in 4wd the whole way, with the passes I've done, 4wd gives me traction for sure, but it also adds .6-.7 to my ETs. When I do hook in 2wd, I can get much better times as I don't have the same drivetrain losses. The whole point of running in 2wd is so I'm not forced to turn two additional 8.6N-m moment arms with the additional frinction and fluid drag losses from the transfer case.

UNBROKEN 09-19-2012 01:55 PM

FWIW we don't shift out of 4wd till the pass is over....even on 9 second passes.
I find it hard to believe you can lose that much time running in 4wd. The transfer case internals are always spinning no matter what so there's very little in the way of extra losses there. I suppose if the truck just doesn't make any power it could...guess I'm not used to the anemic power levels in these things yet.
I'm used to 16-1800 ftlbs of torque...not 400. lol


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