Comprehensive Evo STU prep thread?
I agree with Dave Mack and CRBD that the temp should be a couple more degrees hotter from Inside/middle/outside because not only because of the neg camber that causes the inside to consitently see higher loads but also because the outer edge gets to see more air(from the side) and cools down better than the inside . The only thing I would add is that autocross r-compound seems to build heat from outside/in due to the amount of time spent cornering as opposed to road race tires that gets their heat from inside out (friction caused by load of rotating tires) and my point is that measuring temp on the tires is better accomplished (for autocross) using laser reading that reads outside temp then a probe that goes inside of the tire. Again as stated by the other guys you ned to beat the living out of the tire and take the reading as soon as possible because fast cooling autocross tires will negate your effort if not done in matters of seconds.
You are right john about possible inconsistencies of IR due to outside temp and distance of each reading. However, if measurement is taken on one tire, 3 spots in matter of seconds the temp variation should be negligeable. Now the next issue is to keep distance constant, I have my IR mounted on a homemade handle that keeps distance the same without interfering with reading. Longacre recently came out with a neat inexpensive pyro that combines both IR and and probe; I think it would be a valuable tool for as you can do both core and shell mesurements and compare.
the only way to truly check the temps is to beat the living crap out of it, and test as soon as possible. The tricky part is, if you are setting up for the most "time affecting" portion of a circuit, and it's on the farthest side of the track from the pits, you tend to lose the temps generated on that portion... which is where your temps may not look "even" accross the tread surface, but it may be working effectively in that section.
Of course I am by no means a tire/suspension tuner expert. Just consider me a hack
Last edited by McCall; Mar 26, 2007 at 11:29 AM.
Camber limited suspensions or heavy inside tire spinning on corner exit can contribute to hotter inner tire temps. Also, running a good amount of front toe at high speed, low transition AutoX course's will create a similar effect.
However, I do agree that gathering tire temperature data immediately following a run is critical.
I also agree with kekek with IR vs. probe pyrometer.
Of course, IMHO.
Dave
In relation to IR vs. Probe, a friend and I did a comparison last year to see what the difference would be. He had the IR and I had the probe. We took temps right after one of my runs and the IR would consistently read about 5 degrees cooler than what the core temp would be. The IR would also show different readings on the sunny vs. shade side of the car. Can you get some use out of an IR, yes, but there's a lot of variables there that you would have to adjust for 
In relation to IR vs. Probe, a friend and I did a comparison last year to see what the difference would be. He had the IR and I had the probe. We took temps right after one of my runs and the IR would consistently read about 5 degrees cooler than what the core temp would be. The IR would also show different readings on the sunny vs. shade side of the car. Can you get some use out of an IR, yes, but there's a lot of variables there that you would have to adjust for
Milburn
I just wanted to congratulate Jason Uyeda on a convincing STU class win at the very fast El Toro ProSolo. He has dialed in his SE IX and driving style in very short order and will only get quicker.
I think it was his trick "composite" wing that did it!
Rick
I think it was his trick "composite" wing that did it!
Rick
ECUflash.
find someone good of they'll f-up your car.
If you are willing to drive to PA I would whole heartedly recommend CBRD. Chad did a fantastic job on my car. Ermm...nevermind, I don't want another fast Evo around.
find someone good of they'll f-up your car.
If you are willing to drive to PA I would whole heartedly recommend CBRD. Chad did a fantastic job on my car. Ermm...nevermind, I don't want another fast Evo around.
What would pricing be? Do you have a similar map for the VIII's (03)? Just curious for later reference as I won't be flashing until the summer once I have all the STU "bolt-ons."
Devin
Devin
Last edited by Solo Evo; Mar 28, 2007 at 08:49 PM.
ill work on getting an 8 with comparable mods for an stu legal dealio
cb
