Hey guys, it looks like our Spec cars will fit into ST6 for any of you looking to run a second class. To maximize your HP/WT ratio we could reduce weight in ST6. The formula is average HP times 18. See ST6 trules to get average HP calculations. Or you can just use max HP. So even at 140 RWHP we could weight as little as 2520.

Not sure what cars will be showing up in ST6 but any PTF and PTE cars will fit in here as well as Spec Miata. Spec e30 is classed as a ST5 car due to original HP ratings.

I plan to run Spec and ST6 all year since it will only require 1 car.

ST6 does allow the use of Hoosier R7 tires. You will want 15x9" wheels to take max advantage of that but they will also fit on our 15x7" wheels. I use the 225-45-15 R7. These are about 2 seconds a lap faster than the RR.

Have fun out there! Be safe!

Thanks Charlie. Great information.

Interesting idea Charlie. Thanks for the info. I just looked and there were no ST6 cars in all of 2018 out here in the SE region. So if a few of us were to do this, especially without hoosiers, we'd still be competing for the top spots.

Care to share your plans/ideas for how to easily add/remove ballast to go between the 2 classes? Bolting/unbolting ballast from the floor pan isn't that difficult in theory, but considering we sometimes have only 1 or 2 sessions between Lightning and Thunder sessions, and everything else that we do to get ready for the race or qualifying, minimizing the time to add/remove ballast would help. Especially with a pit crew of 1!

Pete Y

Hi Pete! The reason there were no ST6 cars running is because ST6 is new this year. The lower PT classes will be eliminated (PTE and F).

I will likely just run the standard Spec weight of 2600. Hoosiers are a ton of fun but also cost more. Plus you really have to have the 9" wide wheel to take the best advantage of them.

For ST you do need to have a Dyno sheet but we could just use our peak HP as the multiplier and not remove weight. We are allowed 144.44 peak hp at 2600 lbs.

I didn't pick up on that!

We're at Roebling next week so will see what ST6 cars show up.

Let us know.