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C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
I am looking to get rear drag radials to mount on my extra set of OEM 19x12's. Mostly I road race, but I do the Mojave Mile/Magnum where they do not allow full drag race starts, I'll do 1/2 mile roll races and will be looking to try some 1/4 mile events at the drag track down in the Valley.
Dyno sheet for my HCIE build:
As you can see it is a relatively low torque 600 rwhp build, 7300 FSO with stock gears. I've been considering the MT ET SS 325/30-19 and the Nitto NT-05R in 345/30-19. The MT is 27" tall and the NT-05R is 27.3" tall. I have a McLeod RXt 1000 twin disk clutch. I believe the MT will have more grip but concerned that with my torque it might grip too well. I will probably tote the tires in the car to an event but they need to be approved for Mojave and both the tires above meet that.
While I have not tried them yet, I've heard the MT ET SS is the superior drag radial.
The NT-05R's I tried (not the 345/30-19's) were OK, but the equivalent MT's from 5 years ago were a much better drag radial for track use.
While I have not tried them yet, I've heard the MT ET SS is the superior drag radial.
The NT-05R's I tried (not the 345/30-19's) were OK, but the equivalent MT's from 5 years ago were a much better drag radial for track use.
My expectation also is the MT's have more grip than the NT-05's. My concern is that they will have too much grip for my low torque number and I may bog, unless my clutch can slip enough without hurting it.
Keep in mind, I have only made a few 1/4 mile passes 20+ years ago in a 240 HP M3 and have no experience coming off the line using clutch slip as an aide to keep up the RPM.
i have the nt05r. nice tire and grip nicely. 345/30/19. run about 20 psi cold on the street.
I would not be using these on the street, except possibly to drive to an event.
I'm mostly a cornering guy so like my PSS street tires. For road courses right now I have Toyo R888's but have the spare 19's that are just calling for some sticky straight line tires for events.
This thread appeared twice. That was the link to the original thread where I gave my $0.02.
I have MTs in that size. For straight line acceleration, I have no complaints and would buy them again. They hooked 1st gear ~650 rwhp for me. I didn't run them over 140ish mph though.
My expectation also is the MT's have more grip than the NT-05's. My concern is that they will have too much grip for my low torque number and I may bog, unless my clutch can slip enough without hurting it.
Keep in mind, I have only made a few 1/4 mile passes 20+ years ago in a 240 HP M3 and have no experience coming off the line using clutch slip as an aide to keep up the RPM.
You definitely have enough power to spin the MTs, so bogging is really just a matter of determining how fast to release the clutch and how much power it'll take to prevent bogging.
Dedicated use tires work best on dedicated use wheels and are sized to best take advantage of gearing, available power, weight, surface, and direction of grip desired. Anything less is a compromise and you have to decide what you're willing to sacrifice.
Because you want to maintain the multi-use capabilities of the car, it's smart to keep the majority dedicated to your preferential use and make minimal changes to accommodate the occasional deviation.
OK, so after reviewing the above and knowing your desire is to have the best available straight line traction with just a quick change of tires, then I'd suggest using a 17" wheel to gain sidewall height and 9.5 width to reduce rolling resistance. Using your 19 x 12 wheels is a poor choice for many reasons.
The best tire size to work in all venues (1/4 mi, 1/2 mi, 1 mi, 1 1/2 mi) would be 275/40/17 and just change air pressure and launch techniques as needed.
The brand might be a concern by the rules of the event, since it was last known to me that the 1/2 mi at Gila Bend won't allow Hoosier tires and the MM has a specific list of acceptable DOT racing tires. As a personal choice, I'd stick with Hoosier first and then MT or M&H as alternates.
MTs over the NT05rs. Stick with shorter the better as either will have more than enough traction.
Hoosiers are fine at 1/2 mile, and plenty of people run them. If your willing to find some 17s then yes the faster HC cars typically run the 17" hoosiers.
This thread appeared twice. That was the link to the original thread where I gave my $0.02.
I have MTs in that size. For straight line acceleration, I have no complaints and would buy them again. They hooked 1st gear ~650 rwhp for me. I didn't run them over 140ish mph though.
Sorry, I thought I had posted it but it did not show up in my browser after refresh so I reposted about 4 hours later.
MTs over the NT05rs. Stick with shorter the better as either will have more than enough traction.
Hoosiers are fine at 1/2 mile, and plenty of people run them. If your willing to find some 17s then yes the faster HC cars typically run the 17" hoosiers.
Has there been a rule change from the Jan 2015 posts where Joe said "..allow drag radials as long as they are not a Hoosier." and you responded with "Yah, at the 1/2 miles in Texas a few hoosiers have come apart."
I had asked Tony and he also said no Hoosiers prior to that.
Probably a good idea to get a confirmation one way or the other in writing, since the rules aren't clear what's acceptable.
I would not be using these on the street, except possibly to drive to an event.
I'm mostly a cornering guy so like my PSS street tires. For road courses right now I have Toyo R888's but have the spare 19's that are just calling for some sticky straight line tires for events.
The car is a weekend warrior and don't really drive long distance with the tires. I haven't had any problems with them. I definitely do not push the car on turns though
My MT ET S/S 325/30-19's just got delivered and I dropped off my OE rims to get them mounted. The M PSS 325/30-19's served me well on the street, a few HPDE's and several performance events but "timed out" of the Silver State Challenge. They trapped Mojave at 196.5. The replacement PSS and the MT's are hoping for 200+ in the 1 1/2 mile traps with my (now) HCIE Z.
Has anyone else experienced problems balancing the MT ET S/S tires? When they were on the machine they took 2 1/2 to 3 1/2 ounces of weights and the balance was all over the place. If you had to add that much to balance, did the tires stay balanced when you ran them? I'll be lookig to break 200 in the 1 1/2 mile and certainly will want tires that stay reasonably balanced.
Lots of people don't even balance DRs. Mine have always taken a good ammount, but never had an issue at all.
Be careful of tramlining on the highway if you don't adjust your alignment for the DRs. It isn't bad, but can catch people off guard. If you don't plan on running them on the street it won't matter.
09-20-2016, 04:08 PM
Which drag radials for me
