bowmanm98

I want to get a decent tire pyrometer so I can dial in my sway bars when I get them installed. I was reading that you want slightly more heat on the inside with outside and middle being about the same. I am sure there is some super sweet one for $400 bucks but I don't need that. I am just looking for something decent. Any recommendations?

ltc

I've used this one for a couple of years (mainly on my son's kart) and have been very happy with performance and reliability:
http://www.longacreracing.com/catalo...id=875&catid=7

The Pyrometer Tips and Probe vs. Infrared applicaiton notes on this page are good reading as well

mds

Buy mine. It is an Intercomp #360019 shown here. It works well and is in very good condition. I'm selling because I just don't use it much anymore since I only am doing a couple track days per year. $55 plus shipping. PM me if interested.

Cory M

Either of these will work well. The used on for $55 is a deal.

gieseja

PM sent.

mds

Item sold. Thanks Rennlist.

SundayDriver

While a pyrometer is a good tool (and you have good suggestions about what to use) I don't think there is any tunable relationship between tire temps and sway bar settings.

Cory M

Mark is right. You could see if your front temps are significantly hotter than rears (understeer), or rears are significantly hotter than fronts (oversteer); but these are symptoms that are pretty easy for the driver to feel.

bowmanm98

You guys are probably right since I'm a racing newb but I was reading on www.nsxprime.com in their FAQ and they were talking about it. Say you have your sway bars on full soft front and back. You'll have a tremendous amount of body roll and the outside of your tires will be super hot in comparison. Or if you have them full stiff with greater than 2 degrees of camber the inside of the tires will heat up more in comparison to the outside. So you can dial in the sway bar settings by getting the inside, middle and outside of the tire all the same. The center relative to the outside/inside will have more to do with tire pressure. That was my understanding but I could be wrong.

mds

It is true that camber does change with body roll and so less or more roll may change a tires temp distribution (ie bump camber). But this is a second order effect, at least for a street car. A much more direct change on tire temp is wheel alignment and tire pressure. This is what you want to do first, IMO, assuming that the sway bars are already set for a roughly neutral car.

SundayDriver

That is only going to happen on a very poorly designed suspension. Camber gain is a design parameter to minimize this effect. Camber gain is simply intentional changes in camber as the suspension travels through it's range of motion.

If your temp profile is off, then you want to fix it through a combination of camber changes and tire pressures. I would not personally pay any attention to tire temp vs. sway bar settings.