NASA TT - Lets talk about spending points!

[CSG David]

Originally Posted by phastafrican

Thanks for pointing that out. I sometimes forget that not everyone was involved in that clarification.
Any bolt on aftermarket headers on this car will be assessed a +5 pt because of the primary cat "blob" and piping aft of the header primaries, as well as the removal/non-btm cat inside that blob.

So everything else can still be stock except for that header and it'll be assessed +5 points?

Are camber plates assessed anything? I understand the LCA is a +4 modification I think.

[ja1217]

Originally Posted by CSG David

So everything else can still be stock except for that header and it'll be assessed +5 points?

Yup, so you might as well do full exhaust while you are at it.

I probably will leave the stock cat back on my car as I'm already underweight and the muffler acts as a bit of a diffuser. Removing it would create a nice parachute area and I don't have the points to spend on a proper diffuser. That and I don't think the stock muffler will hold me back on power much, if at all.

[CSG David]

Originally Posted by ja1217

Yup, so you might as well do full exhaust while you are at it.

I probably will leave the stock cat back on my car as I'm already underweight and the muffler acts as a bit of a diffuser. Removing it would create a nice parachute area and I don't have the points to spend on a proper diffuser. That and I don't think the stock muffler will hold me back on power much, if at all.

Catback does nothing to performance. Maybe a couple itches here and there, but not enough to justify the cost per benefit.

[phastafrican]

Originally Posted by CSG David

Are camber plates assessed anything? I understand the LCA is a +4 modification I think.

Camber plates and bolts, and most bushings are free, thank God.

[ja1217]

Originally Posted by CSG David

Catback does nothing to performance. Maybe a couple itches here and there, but not enough to justify the cost per benefit.

Yeah, the main reason I would get a different cat-back would be the weight savings, but, like I said, I'm already underweight.

As for the camber plates, you don't need to take any points for those. You are correct about the rear lower control arms being 4 points. I'm not sure why they are worth so many points. Hard to believe that a little extra camber in the rear is worth as much as say a wing on the track.

[CSG David]

Originally Posted by phastafrican

Camber plates and bolts, and most bushings are free, thank God.

I've been helping out a couple clients out on simple HPDE TA builds that also qualify in TTD. Glad my reading comprehension is working.

[CSG David]

Originally Posted by ja1217

Yeah, the main reason I would get a different cat-back would be the weight savings, but, like I said, I'm already underweight.

As for the camber plates, you don't need to take any points for those. You are correct about the rear lower control arms being 4 points. I'm not sure why they are worth so many points. Hard to believe that a little extra camber in the rear is worth as much as say a wing on the track.

Because you gonna be a cheetah with those camber arms.

[THEmailman]

I currently run a 225/45 size street tire with 17x8 for wheels. Since you get back 4 points for running that size, would there be a benefit to running a 215 wide tire? That would give you 7 points back and pretty much completely negate running semi-slicks/full slicks?

This would be at marginally higher than stock power levels (full exhaust, intake, tune for 93). Or at this point, are you wanting to keep the width to maximize cornering? And would running an 8" wide wheel work with the 215's?

[AZP Installs]

Run a wide 225. I put the 225-45-17 Contis against my 225-45-17 RE070s and they were significantly wider, like 1" on each side maybe. Next time they are off the car I'll take a pic. So find the widest tires you can because the rule goes by what's printed on the tire

-Mike Paisan


Maintaining, Modifying and Educating TriState Enthusiasts since 2001.
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[juliog]

Offtopic: do you think the 2016 Miata will be classed as a TTD car? My FR-S is overbuilt for the class.. :P

[THEmailman]

What types of coilover systems would only take the 3 point hit instead of 5 i.e. less than 40mm shaft and don't have an external reservoir? I k ow you still have to take the 2 points for springs...

[phastafrican]

Originally Posted by THEmailman

What types of coilover systems would only take the 3 point hit instead of 5 i.e. less than 40mm shaft and don't have an external reservoir? I k ow you still have to take the 2 points for springs...

Kw v3, RCE T2, konis, BC racing, etc. come to mind

Originally Posted by juliog

Offtopic: do you think the 2016 Miata will be classed as a TTD car? My FR-S is overbuilt for the class.. :P

Purely guessing, yes with two stars based on estimated pwr/wt. The FoST is a D car at it's ridiculous HP so wouldn't be surprised.

Originally Posted by THEmailman

I currently run a 225/45 size street tire with 17x8 for wheels. Since you get back 4 points for running that size, would there be a benefit to running a 215 wide tire? That would give you 7 points back and pretty much completely negate running semi-slicks/full slicks?

This would be at marginally higher than stock power levels (full exhaust, intake, tune for 93). Or at this point, are you wanting to keep the width to maximize cornering? And would running an 8" wide wheel work with the 215's?

Yes, it will fit on an 8" wheel, but you'll be compromising sidewall strength. 215 is simply too narrow to be fastest. Tire width costs points because, TYPICALLY, the more contact patch, the faster you are. 225 hoosiers are as wide as 235 toyos. 255 Hoosiers are assessed 275mm width points for their actual width just to give you idea how much wider they get.
But the points system allows varying configuration. I say try it and let's see. What rcomps are you getting in 215s? R888?

[THEmailman]

Originally Posted by phastafrican

Kw v3, RCE T2, konis, BC racing, etc. come to mind






Purely guessing, yes with two stars based on estimated pwr/wt. The FoST is a D car at it's ridiculous HP so wouldn't be surprised.





Yes, it will fit on an 8" wheel, but you'll be compromising sidewall strength. 215 is simply too narrow to be fastest. Tire width costs points because, TYPICALLY, the more contact patch, the faster you are. 225 hoosiers are as wide as 235 toyos. 255 Hoosiers are assessed 275mm width points for their actual width just to give you idea how much wider they get.
But the points system allows varying configuration. I say try it and let's see. What rcomps are you getting in 215s? R888?

I believe Kw v3 have more than two ranges of adjustments correct? That would be assessed 10 points total.....

Also if I were to go with a 215 size tire, I would run something similar to the R888 or just go full slick because I would get those points back. If 8" wide wheels are too big would 7" work then? I could pick up some different wheels to do that.

Also, since you could pick up those points you might be able to run aero or other beneficial parts to make up for the skinnier tires....this is only valid if those things help more than the wider tires would.

[phastafrican]

Originally Posted by THEmailman

I believe Kw v3 have more than two ranges of adjustments correct? That would be assessed 10 points total.....

Also if I were to go with a 215 size tire, I would run something similar to the R888 or just go full slick because I would get those points back. If 8" wide wheels are too big would 7" work then? I could pick up some different wheels to do that.

Also, since you could pick up those points you might be able to run aero or other beneficial parts to make up for the skinnier tires....this is only valid if those things help more than the wider tires would.

KW v3 is a double adjustable coilover: Rebound & Compression.

*** Full slicks are worth +30pts ***
I don't think you'll find any other DOT R-compound in 215/17 other than R888. The approved wheel width is 7.0" - 8.0", so 17x8" should work just fine. Just keep in mind you are seriously giving up on some lateral grip by running the narrow tire. That could be a huge performance hit and corner speed disadvantage, but I'm interested in the results...