Yup,
Got really whooped by that one recently. Gorgeous car though...
R
Yup,
Got really whooped by that one recently. Gorgeous car though...
R
Rob Breault
BMW 328is #36
2008 Driving Impressions Pro-ITA Champion
2008 NARRC DP Champion
2009 NARRC ITR Champion
2009 Team DI Pro-ITR Champion
Hey Dan.
Are there any items that are ITR legal but not JP legal?
What is the difference in weights?
How about suspension prep?
Does anyone have any lap time comparisons?
John Norris
#07 ITS/R BMW 325is
#07 ITS BMW 325
Sponsors:
GREEN FLASH BEER
GT International BMW Service since 1976
Hey Norris, how goes it out west?
I can answer a couple of your questions with out any research.
ITR is completely legal to run in JP class @ 2765#.
I'll double check on the weight unless someone else can answer that question.
I'm not certain about the suspension. I read the rule book but forgot.
At Summit Point, WVa., a JP car is about 1 to 1.5 sec faster on the 2 mile course. There is a link to a video that actually shows the difference between a JP 325 and a legal ITR car. search itr vs jp.
I copied this from the bmw rule book, just a few. :~)
a. Suspension components that control rear camber may be replaced with aftermarket components to provide this adjustment.
5. Suspension bushing material is free.
a. Bushing material does not include replacement of bushings with spherical bearings or rod ends such as Heim ends except as noted in F below.
b. Solid bushings are allowed if fixed in place and allow rotation in a single plane or axis.
6. Spherical bearings are permitted in the following components.
a. Front upper strut mounts.
b. Upper and lower rear shock mounts.
c. Rear lower control arms.
d. Camber plates.
Rotors are free (except carbon rotors are not allowed). The rotors must fit within wheels that comply with paragraph 3.A, above.
2. Calipers are free with the following limitations: 4 piston maximum, 2-piece design, 1 caliper per wheel.
3. The number of master cylinders must be as supplied by the factory, except that early production cars (i.e. 1600, 1800 and 2002) may update to tandem master cylinder for the safety of the dual circuit system.
4. Master cylinders may be modified to increase volumetric flow.
Last edited by dj10; 09-30-2009 at 04:26 PM.
Not anymore. First of all, you're talking about an E36 325i (you know there are other ITR and JP BMWs, right?)
Second of all, starting in '09, SCCA IT crossover cars have to run in their SCCA class, not in their equivalent Prepared class. So an ITS car would run as "ITS", not "JP."
Unless, of course, it's really fully legal for JP. Note that an IT car can have spherical bushings in places that aren't legal in JP. Don't know if YOU do or not. I did until just recently.
Josh Sirota
ITR '99 BMW Z3 Coupe
I admit that I was pretty impressed with the speed of Ball's car so when I saw the JP stickers on the car I was concerned. Bill Ball the owner said it was built to the max over many years. I would expect a built to the max car would be taking advantage of all that can be done under JP rules. I plan on visiting the gentleman to request a look at his ride, hopefully with a BMW expert with me. I will have the JP rules in my pocket. I have discussed this with at least one club official.
BenSpeed
#33 ITR Porsche 968
BigSpeed Racing
2013 ITR Pro IT Champion
2014 NE Division ITR Champion
STU BMW Z3 2.5liter
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