2023 Proposed ST Rules Revisions--Comment Period through 11-20-22

[Grant Ellis]

Well being as I am going to get a -.3 in TT3 for Hoosier's and their contingency sucks I am just gonna go Pirellis next year!   

[rsotak]

For the mechanical throttle body bonus being removed for FI cars.  I assume it was removed because the thought is that turbos can control boost pressure to simulate the DBW throttle body.  For supercharged cars this isn't true since it is coupled to engine RPM.

I would proposed that the bonus not be taken away for SC cars as the disadvantages of a mechanical throttle body still exist like in a NA car.

[pastoli]

What are the chances of TT5 being allowed to run fender vents as well? Fender vents help to get hot air build up out of the front end. This will help with brake pad life, wheel bearing life, etc. The biggest argument has been to keep TT5/TT6 at a lower cost entry to race, but these can definitely help the long term cost for racers. TT4/TT5 cars can blend into other series like Gridlife where they allow fender vents. I was stoked to see the addition of TT4 getting fender vents. 

[joejenie]

Was looking at timing last weekend at Ozarks and the MX-5 Cup driven by a pro racer at that track (with slicks) was 10 seconds a lap slower than the top 2 ST4 cars.  The MX-5 Cup car is around 145 whp average and should be in ST5 with any DOT tire (Slicks it should be able to still run in ST4 but no to that as well).  Frustrating because we want to run a couple WERC races later this summer, but no reason to do it if we are 10 seconds off the pace.  

Would like to see a modification to ST5 that we can run a MX-5 Cup with the sequential but understand there will be a penalty like in other ST groups.  2nd one would be that you could run MX-5 Cup in ST-4 with the BFG slicks that it is homologated with, but again, with a penalty mod on the horsepower.  In both cases, the car has way less horsepower than if you used the mods already used and would fit fine.  Thanks for your thoughts and let me know if I can be any help in using my car for testing if needed.  

Edited April 17 by joejenie

[Greg G.]

On 4/17/2023 at 10:49 AM, joejenie said:

Was looking at timing last weekend at Ozarks and the MX-5 Cup driven by a pro racer at that track (with slicks) was 10 seconds a lap slower than the top 2 ST4 cars.  The MX-5 Cup car is around 145 whp average and should be in ST5 with any DOT tire (Slicks it should be able to still run in ST4 but no to that as well).  Frustrating because we want to run a couple WERC races later this summer, but no reason to do it if we are 10 seconds off the pace.  

Would like to see a modification to ST5 that we can run a MX-5 Cup with the sequential but understand there will be a penalty like in other ST groups.  2nd one would be that you could run MX-5 Cup in ST-4 with the BFG slicks that it is homologated with, but again, with a penalty mod on the horsepower.  In both cases, the car has way less horsepower than if you used the mods already used and would fit fine.  Thanks for your thoughts and let me know if I can be any help in using my car for testing if needed.  

Joe,

As noted in the rules, sequentials are specifically disallowed in ST5 & ST6.  Opening the door to any model, would just lead to requests for it opening up to all.  ST5 & 6 are getting expensive enough.

We are working on testing the BFG slicks used in MX-5 Cup, though.  We may end up approving those specific tires for the lower classes.