there were several "scary" trends put forward in this issue regarding the rules, and I have attached the text of my note to the scca.
Everyone, please post your feelings here AND forward them to the PRB in the hopes that we can prevent these rules from becomming official.
Please note: the email address that they provide for feedback is incorrect, the correct address is:
[email protected] not @scca.com.
my message attached below:
Respectfully I would have to disagree with several of the proposed rule changes for next year. I object to the following:
3. In order to reduce top speeds and increase reliability, reduce the Open Class restrictor size to 34mm.
As an experienced engineer intimately familliar with fluid dynamics, compressor theory, and turbo-motorsports abroad, this rule will not have the intended effect. The top speeds in US rally are not "so high" because of the extra 6mm of inlet diameter, our speeds are "so high" because of the roads that are chosen for our useage. More creative and difficult "technical" roads would significantly decrease the car's average and peak speed. Additionally, WRC cars currently run 34mm restrictors and are considerably faster than our current open class cars. All a restrictor effectively does is limit the max rpm that the engine can effectively turn, and the top speed issue can easily be overcome by making more torque on the bottom end. This is done through spending copious amounts of money on engine components, turbos, and fuel mapping to make obsurd torque at low engine speeds. Finally you change the final drive gearing of the car and you have a car that will do 140mph at 5000rpm instead of 140mph at 7500rpm. In summation, this rule would only widen the gap between the "haves" and the "have nots"; people who can afford to spend $10k-$15k on a mountune motor will still be able to hit the peak top speeds, and the rest of the people will be mired back with the P and PGT cars. Additionally, if the primary reason for this rule was to more closely allign with the international FIA standards, then please be upfront about it, and just as a suggestion; why not just reinstate GRP A if you really want to allign with the FIA rules and leave Open class alone.
4. Allow manual mechanically selected sequential transmissions in Open class.
Here again is a problem, the first two proposed changes are supposedly written "to reduce costs". How can you reasonably limit the number of turbos and gearboxes because they're expensive, but in the same breath say it's OK to install $15K gearboxes. Seems a bit contradictory.
Please do not take these comments as personal attacks, I hold nothing directly against the PRB, but these rules do not seem to support the general feelings of the club membership and would not be beneficial to the sport of rallying in the US.
Sincerly,
Greg Knepper
Crew chief (open class Mazda GTX (club))
Competitor (Grp 5 Ford Sapphire Cosworth (2004 club))