PDA

View Full Version : STU Turbo Car Weights?



Knestis
03-14-2013, 08:39 PM
Front wheel drive cars may reduce their minimum weight by 5%.
Front wheel drive cars with a strut type front suspension may
reduce their minimum weight by an additional 2.5%.

So does that mean that, if one is racing an FWD car w/struts, they take the restrictor table weight and subtract 5%, then subtract 2.5% of the resulting weight...

OR

...take the table weight and subtract 3%...??

K

Greg Amy
03-14-2013, 09:53 PM
All deductions are reductions from the base weight. So you add the deductors first (5% + 2.5% = 7.5%) then you deduct that from the base.

So, for example, if your FWD VW GTI is running a 37mm TIR, the base weight is 2985. You're FWD so you get 5%, and you have struts so you get another 2.5%, for a total of 7.5%. 2985 minus 7.5% = 2762#.

But, if you want to argumentate with me, I'll say you take the smallest deductor first, then the largest, so you'll need to weigh 2766# ;)

(Note that when you take them in sum, e.g., 7.5% instead of 5% then 2.5%, you get more...)

GA, offerin' his unsubstantiated Internet opinion yet again...

Knestis
03-14-2013, 10:52 PM
No argumentationing from me, Greg...

Thanks!
K

jrem72
03-19-2013, 09:05 PM
2003 Mazdaspeed Protege STU
Bought this car with a log book for STU?

2.0 liter turbo former Grand Am Car.

What is the weight?

Thanks for any help.
JR2747

Greg Amy
03-19-2013, 09:15 PM
Varies depending on the TIR size...see GCR. - GA

jrem72
03-19-2013, 09:34 PM
So with a 37mm TIR weight would have to be more than 2985? It is a FWD so can reduce weight by 5%
Sound right?

Greg Amy
03-20-2013, 07:03 AM
So with a 37mm TIR weight would have to be more than 2985? It is a FWD so can reduce weight by 5%
Sound right?
"More than"? No. A turbo car running a 37mm TIR would have to be "at least" 2985. And you can deduct 5% for FWD.

- GA

lawtonglenn
03-20-2013, 07:47 AM
"More than"? No. A turbo car running a 37mm TIR would have to be "at least" 2985. And you can deduct 5% for FWD.

- GA

:) Greg is now that 8th grade math teacher that gave us a B on the test


"more than": weight > 2985 (2985.000 is bad, 2985.001 is ok)

"at least": weight >= 2985 (2985.000 is ok)

">=" is my keyboard's best rendition of "greater than or equal to"

.

Greg Amy
03-20-2013, 08:29 AM
'Zactly! And 2984.49 is "bad" (If we had scales that had hundredths resolution, we'd round off to the nearest pound.)

But, I was more trying to clarify the implied characterization than the math. So I'm actually the 8th grade writing teacher that gave you a B.

- GA