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~$0.50/lb or less for used weightlifting plates + drill + a few $$ for 2" wide steel plate bar to cut up into 2x2 backing plates + few more $ for bolts & locknuts = secured legal safe ballast. I'll do it trackside for you for a 6-pack of good beer.... And it's easier than swapping motors

So anywho, I'm lost as to where you've ended up at this point

Target competition class is ___ with what mods package? (that'll determine your target base class...)
Then if you're set on holding the weight steady it's a one-line email to Greg - "I have a Miata at 2XXXlbs and want to be TT_ whatever base class so please tell me my max whp" and tune from there. If you want to hold power steady, flip that around.

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Ken Brewer - 1994 Toyota MR2 #6 TTF, PTF, E3
One of the NASA-TX Time Trial Directors

If I work-out points on my car with a TTD** base class I take 21-points running a 225 tire (245 base) taking 21 total points, add the asterisks at 7 points each and I take 35 points total, taking me to TTC; 2380lb/14.25 = 167whp. I wish NASA published the TTX, TTX*, and TTX** ratios so it's not such a mystery. That way I could build my car to the limit of the rules without making threads on the internets.

Also, if I can base-class in TTD (no asterisks) I can either run a 225 NT-01 in TTC or 205 SM6 in TTD, lol. Too bad I can't get ahold of those tires since I'm not in SM.

anyone can buy SM6s

- KB, has about 6 of them in his possession currently - makes great cheap front tires for the MR2

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Ken Brewer - 1994 Toyota MR2 #6 TTF, PTF, E3
One of the NASA-TX Time Trial Directors

Yup. Just place an order and blamo.

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#624 TTE/PTE Integra
As seen in Super Street FF Battle 4! (November 2012 issue)

I can give you two data points and you may be able to interpolate between them to get a general idea of how much power you could make before requesting the numbers from Greg.

I have two W/P re-classifications for my car, a 1993 Miata, at a weight of 2395 lbs:
TTD 161rwhp
TTC 185rwhp

I keep my car at the same weight and adjust power output for each class through the use of an inlet restrictor on my Rotrex supercharger and different spark maps. I think the power numbers would be slightly lower for an NB chassis.

Have fun with this great platform!

Joshua

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Joshua
'93 Miata TTD, TTC, SSM
'86 BMW 325 TTF, TTE
'03 S2000

It's possible that at 157whp and 2380lbs (give or take 20lbs) you could squeeze a TTD base out of GG.

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#624 TTE/PTE Integra
As seen in Super Street FF Battle 4! (November 2012 issue)

Yep, my options are 161whp and a 205 SM6 for TTD and I'll be built-out for the class with the only "pointless mods" being the gigantic brakes. 179whp for TTC and I can run the 225 NT-01.

For TTD I have to buy another set of wheels and tires, then I run the risk of being the only car in the class, so I'm not really sure what I'm going to do. I suspect I'll have a tough time getting more than 170whp out of this engine.

Thanks for the help everyone.

We've got a couple instructors that are starting to show up more often that have E36 M3s in TTD trim. Once you get a class in the 2-3 range, it'll grow on its own much easier...

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Ken Brewer - 1994 Toyota MR2 #6 TTF, PTF, E3
One of the NASA-TX Time Trial Directors

Thanks K-Dogg. Any rule changes coming to us in the off season? I'd like be in TTD, I think the car can be nationally competitive there. We all know the driver is world-class.

other than TTA going away I haven't seen anything. Greg still hasn't settled the tire stuff like he said would happen by now though.

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Ken Brewer - 1994 Toyota MR2 #6 TTF, PTF, E3
One of the NASA-TX Time Trial Directors