2015 STU Discussion!
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From: Why do they always call the Evo the Dark Side?
This course was a bit of a bad data point for that argument though....i mean we were at about 70mph in an STX e36 with 190whp, and the Berry car was at about 85mph in the same spots. The course was just wide open, 3rd gear in multiple locations.
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From: Seattle
Thread Starter
Joined: Jul 2002
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From: Why do they always call the Evo the Dark Side?
thanks, yeah, the Bridgestones have a lot of traction.
We compared them to the new Star Specs at the test and tune. The stones had a little squirm right after initial bite, especially on transitions. The tread blocks are extremely soft, you can easily dig a fingernail into them. Sidewalls seem plenty stiff though and we ran similar tire pressures between the two (and our old set of kooks). In dialing in the rollover, we eventually dropped the rears a pound. With the Bridgestone, turn in-bite is immediate and the extra traction is noticeable, I’m not saying they turn in sharper, they just grab grab grab. I was able to flog the car around more on the Dunlops, which suits my driving style more, but the grip of the Bridgestones was too superior to warrant not going that route.
So yeah, I ended up hitting a lot of cones, lol… the test and tune was the first we’d run them, day one was a bit of a nightmare and day two was definitely a nail biter… I still ended up cone’ing away my fastest left, and the win (and the Super Challenge, lol), but overall, we’re happy with them. The extra grip in the sweepers (compared to the Dunlops) was exceptional as well, VERY noticeable.
Read solomatters.com’s first day Crow’s Pro report, it has some interesting observations about them, at the bottom of the page.
We compared them to the new Star Specs at the test and tune. The stones had a little squirm right after initial bite, especially on transitions. The tread blocks are extremely soft, you can easily dig a fingernail into them. Sidewalls seem plenty stiff though and we ran similar tire pressures between the two (and our old set of kooks). In dialing in the rollover, we eventually dropped the rears a pound. With the Bridgestone, turn in-bite is immediate and the extra traction is noticeable, I’m not saying they turn in sharper, they just grab grab grab. I was able to flog the car around more on the Dunlops, which suits my driving style more, but the grip of the Bridgestones was too superior to warrant not going that route.
So yeah, I ended up hitting a lot of cones, lol… the test and tune was the first we’d run them, day one was a bit of a nightmare and day two was definitely a nail biter… I still ended up cone’ing away my fastest left, and the win (and the Super Challenge, lol), but overall, we’re happy with them. The extra grip in the sweepers (compared to the Dunlops) was exceptional as well, VERY noticeable.
Read solomatters.com’s first day Crow’s Pro report, it has some interesting observations about them, at the bottom of the page.
Thanks for the breakdown!
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From: Why do they always call the Evo the Dark Side?
I think Sam was saying on FB that they may or may not have been truly 60'. Or at least that they may not be comparable to other 60's.
Last edited by Butt Dyno; May 11, 2015 at 05:14 AM.
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From: Reading, MA
I have no idea what is up with short times and whether STI should be able to go that fast. But, seeing his both runs and comparing to the Sam's runs, Martin was acceleration and going way faster than C5 until the first big turn. Not sure why C5 was not able to do so, but it looked slower. Maybe position of the camera had something to do with it...
Second part of the course looked pretty close between the two cars.
Again, all of it is based on the videos those guys supplied...wish I was there though!
Second part of the course looked pretty close between the two cars.
Again, all of it is based on the videos those guys supplied...wish I was there though!
With my first national-level event coming up, I'm going through the car with a fine-tooth comb to make sure my car is by-the-book class legal. A few questions:
I've swapped the stock IX MAP sensor out for a JDM MAP sensor, only for the purposes of being able to log boost through the ECU. Could this be a problem?
Boost tables are still unmodified, entire boost system is stock, I've installed brand-new OEM boost pill tubing just in case, and it's trivial to verify that my peak boost is within factory specs using the peak-hold function of my boost gauge.
Also: I don't have a factory plastic undertray. I've been constantly posting in the local Evo groups looking for anyone willing to sell theirs, but I'm coming up empty. Could this be a problem? I really don't want to spend $500 on an OEM replacement.
EDIT: Forgot to add, I will not be winning anything, FWIW.
I've swapped the stock IX MAP sensor out for a JDM MAP sensor, only for the purposes of being able to log boost through the ECU. Could this be a problem?
Boost tables are still unmodified, entire boost system is stock, I've installed brand-new OEM boost pill tubing just in case, and it's trivial to verify that my peak boost is within factory specs using the peak-hold function of my boost gauge.
Also: I don't have a factory plastic undertray. I've been constantly posting in the local Evo groups looking for anyone willing to sell theirs, but I'm coming up empty. Could this be a problem? I really don't want to spend $500 on an OEM replacement.
EDIT: Forgot to add, I will not be winning anything, FWIW.
Last edited by Construct; May 11, 2015 at 10:01 AM.
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From: CT
With my first national-level event coming up, I'm going through the car with a fine-tooth comb to make sure my car is by-the-book class legal. A few questions:
I've swapped the stock IX MAP sensor out for a JDM MAP sensor, only for the purposes of being able to log boost through the ECU. Could this be a problem?
Boost tables are still unmodified, entire boost system is stock, I've installed brand-new OEM boost pill tubing just in case, and it's trivial to verify that my peak boost is within factory specs using the peak-hold function of my boost gauge.
Also: I don't have a factory plastic undertray. I've been constantly posting in the local Evo groups looking for anyone willing to sell theirs, but I'm coming up empty. Could this be a problem? I really don't want to spend $500 on an OEM replacement.
EDIT: Forgot to add, I will not be winning anything, FWIW.
I've swapped the stock IX MAP sensor out for a JDM MAP sensor, only for the purposes of being able to log boost through the ECU. Could this be a problem?
Boost tables are still unmodified, entire boost system is stock, I've installed brand-new OEM boost pill tubing just in case, and it's trivial to verify that my peak boost is within factory specs using the peak-hold function of my boost gauge.
Also: I don't have a factory plastic undertray. I've been constantly posting in the local Evo groups looking for anyone willing to sell theirs, but I'm coming up empty. Could this be a problem? I really don't want to spend $500 on an OEM replacement.
EDIT: Forgot to add, I will not be winning anything, FWIW.
Technically (by the book) you must have the stock undertray and there is no allowance to change the MAP sensor.
You can make a case to those in the class that there is no performance benefit if they question (or notice) the mods, but I seriously doubt you'd survive a protest if anyone felt so inclined.
FWIW, peak boost isn't what I'd be interested in changing if I were cheating, it would be the duty cycle.
-Bryan