Any one know what this is?
Any one know what this is?
STU BMW Z3 2.5liter
All kidding aside, the "target" , which is just an assumption is crank. ie 2.5 BMW makes roughly 255 WHP. 2.5(120)=300, 300(.85)=255.
Chris "The Cat Killer" Childs
Angry Sheep Motorsports
810 417 7777
angrysheepmotorsports.com
IT,SM,SS,Touring, and Super Touring
Funny, that doesn't jibe with the the target power to weight rato of 9-10lbs/hp because then the car would have to weight 2550lbs to get to 10:1.
The new TIR to weight chart and tire size limits really slowed Hoover down, he just set a new lap record this weekend:
http://www.mylaps.com/results/showla...rclass=0&pos=1
The only option it to go turbo or go home....
Excuse me but where did you come up with 9-10:1?
Looking at those results I see new TR's in all the classes. The evidence provided would indicate that the track was fast .
Chris "The Cat Killer" Childs
Angry Sheep Motorsports
810 417 7777
angrysheepmotorsports.com
IT,SM,SS,Touring, and Super Touring
My colleague had the power value as wheel in that calculation.
Chris "The Cat Killer" Childs
Angry Sheep Motorsports
810 417 7777
angrysheepmotorsports.com
IT,SM,SS,Touring, and Super Touring
no dog in the hunt, but no, he didn't use whp. he used 120 hp/l which you just stated was the estimated chp/l for STU. you assume a 15% driveline loss and you could just as easily have said 102 whp/l (120*0.85).
weight to wheel hp numbers following Greg's math (which is correct):
120hp/liter x 0.85 x 1 liter/1000cc x cc/1.1# = .093 hp/#, or 10.75 #/hp
And FWIW, 102whp/l is much more in line with STL, I don'thave a clue what one might actually see in STU
Last edited by Chip42; 01-29-2013 at 11:14 AM.
Be careful: "he" made that post in January of 2011, which may have been prior to "his" inclusion on the STAC. Or damned close, so a newbie.
- Him, who is enjoying this discussion, especially in light of a lot of IT guys Jonesin' to get their category into the National racing program..."be careful what you ask for..."
doesn't change the math. what "he" calculated in 2011 matches what the cat killer quoted as expected chp/l. I was simply pointing out that chris' assertion about the math was incorrect based on his earlier posts, dated 2013.
and THIS IT guy might think the options presented by ST look like fun but this IT guy has NO desire to see IT made into a "national" class.
I think the only reason any of 'us' would want IT in the National program is if it was managed the way it is now...by the Ops Manual. If it was to take the typical 'Prod Style' or now 'ST style' comp adjustments, I don't know anyone who would want the CRB screwing it up.
Granted that there were other records broken that weekend, but not in all classes. But, the STU record was set exactly a year ago by the same car and driver. So, if the reset weight to TIR chart was used, and he still broke the record, it would indicate that the same gap between turbo and naturally aspirated cars at the runoffs still exits as the N/A car's hadn't and anything done to speed them up.
A lot of the new lap records that weekend were in new classes, or classes that had been sped up. T1 and T2 are now both faster classes, and T4 and BS didn't exist a year ago. As for STU:
Jan. 22, 2011 Hoover set the STU track at AAA Speedway at 1:53.897
Jan. 22, 2012 he reset the STU record with a 1:50.115
Jan. 27, 2013 he reset it again, at 1:48.792
Looks like those STU turbo car adjustments are working.
EP 1990 Mazda RX-7 (used to be STU until the turbo cars scared me away, and STL rotary cars require too much ballast)
ITS/T4 2004 Nissan Sentra SE-R Spec V
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