Nitto NT05's - set up info

KKennedy717 · Post by **KKennedy717** » Thu Sep 29, 2011 8:39 pm

Looking for baseline cold and hot pressure numbers for Nitto NT 05's running on an 03 Mustang GT in 275x40x17 sizing. First time w/ these tires and am just looking for a starting point. Called Nitto direct and they were surprisingly unhelpful. Anyone have any experience on these tires at NHMS or other tracks?

DPS · Post by **DPS** » Fri Sep 30, 2011 1:21 pm

KKennedy717 wrote:Looking for baseline cold and hot pressure numbers for Nitto NT 05's running on an 03 Mustang GT in 275x40x17 sizing. First time w/ these tires and am just looking for a starting point. Called Nitto direct and they were surprisingly unhelpful. Anyone have any experience on these tires at NHMS or other tracks?

I've run the NT-05s on my Corvette so I don't know if this helps. I aim for 38lbs f, 37lbs r for hot temperatures. For me, that means I have to start around 30lbs cold.

Dave

KKennedy717 · Post by **KKennedy717** » Fri Sep 30, 2011 2:25 pm

Dave - thanks for the info. About how much does your Corvette weigh?

6PAK72 · Post by **6PAK72** » Fri Sep 30, 2011 4:02 pm

To help you dial in the other side of the equation:

Miata, 2234pounds loaded 225x50x15" cold set 27lbs off hot 33lbs

Post by **WillM** » Fri Sep 30, 2011 6:54 pm

Dave, is that the NT-05 street tire or the NT-05R Race tire?

Kevin, how wide are the wheels? 9"? 10"? 11?"

I would think that David's numbers are probably a good starting point. Get them up to temp and equalize and bleed a couple of PSI until you think grip is going away. Generally speaking, the wider the rim, the less pressure you can get away with.

My limited experience with NT-01 tires is on the Miata with 7 & 8" rims. Jeff's numbers are about what I'd run. That said, the 275/45 is going to have 20% taller sidewalls than my puny 205/50-15 tires. More sidewall = more flex. Racers often add pressure to compensate for sidewall flex.

It is all about balance. i don't think you could go wrong with anywhere between 28-40 psi hot, so pick a starting point and start experimenting!

Cheers,

Will

KKennedy717 · Post by **KKennedy717** » Fri Sep 30, 2011 10:44 pm

Will - thanks for your input. My rims are 9 inches wide. A note on the tire designation. The NT-05R is a drag radial. The NT-05 is considered a street tire based upon tread pattern and compound. What is the target for the increase in pressure from cold to hot? Does this figure tend to vary with the weight of the car? The Mustang weighs 3383 lbs. w/ a full tank of gas and driver in place. My current thinking is starting at 32 psi cold and hoping to be 38-40 psi when hot. Your thoughts?

DPS · Post by **DPS** » Sat Oct 01, 2011 1:31 pm

My car weighs a little over 3100 lbs. I was using the NT05 street tire, not the NT05R.

Dave

COM Sports Car Club

Nitto NT05's - set up info

Nitto NT05's - set up info

Re: Nitto NT05's - set up info

Re: Nitto NT05's - set up info

Re: Nitto NT05's - set up info

Re: Nitto NT05's - set up info

Re: Nitto NT05's - set up info

Re: Nitto NT05's - set up info

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