jlucas

July Fastrack:

Improved Touring
Item 1. Improved Touring has thrived as a regional class since its inception, and is the "point of entry" for most new SCCA Club racers. It draws
large fields in most Regions, and new cars are being built each year. While IT is healthy now, it is aging. A class above ITS is needed to fill the
pipeline for the future. An increasing number of requests have been denied from members asking for higher horsepower cars to be classified. A
quick look at old SSA cars, T2 cars and T3 cars shows a plentiful supply of cars in race trim searching for a home.
Effective 1/1/07, the CRB recommends adding a new class and associated rule changes to the ITCS as follows;
Add ITR to the list of IT classes listed in section 17.1.4.
Add to section 17.1.4.D.7.a.1 as follows: Cars classified in ITR may utilize any wheel diameter up to 17" or retain their stock diameter wheels if
larger.
Add to section 17.1.4.D.7.a.6 as follows: ITR cars may use 8.5" wheels.
Included is a spreadsheet with over 30 cars representing our first pass at the cars that should make up in the initial classification for ITR in the
ITCS along with anticipated race weights using the ITAC's classification process. Manufacturers represented include BMW, Porsche, Honda,
Acura, Nissan, Audi and others.

Make Model Model
Year
Stock HP Engine
Type
Displace Estimated
Flywheel IT
HP
Rounded
Spec
Weight
ITR
Honda S2000 00-03 240 DOHC I4 2.0 276 3005
Porsche Boxster 97-99 201 DOHC F6 2.5 251 2830
BMW Z3 97-00 189 DOHC I6 2.8 246 2765
Porsche 911SC 78-83 180 SOHC F6 3.0 225 2630
Porsche 928 78-82 219 DOHC V8 4.5 274 3080
Porsche 944S2 89-91 208 DOHC I4 3.0 250 2810
Acura RSX-S 02-04 200 DOHC I4 2.0 250 3665
Porsche 968 93-97 236 DOHC I4 3.0 271 3055
BMW 330i 00-04 225 DOHC I6 3.0 293 3290
Ford Contour SVT 98-00 195 DOHC V6 3.0 244 2590
Nissan Maxima 00-01 227 DOHC V6 3.0 284 3040
BMW 328i/328is 96-99 190 DOHC I6 2.8 252 2830
Nissan 300z 89-96 222 DOHC V6 3.0 289 3250
Toyota Supra 87.5-92 200 DOHC I6 3.0 260 2925
Ford Taurus SHO 89-95 225 DOHC V6 3.2 270 2890
Toyota Supra 93-97 220 DOHC I6 3.0 286 3220
Honda Prelude 97-01 195 DOHC I4 2.2 244 2640
BMW 325i 92-95 189 DOHC I6 2.5 246 2765
Honda Prelude 93-96 190 DOHC I4 2.2 238 2570
Ford Mustang 99-04 190 SOHC V6 3.8 238 2670
Porsche 944S 87-88 188 DOHC I4 2.5 226 2540
Acura Legend 91-95 230 SOHC V6 3.2 288 3135
Chevy/Pontiac Camaro/Firebird 97-99 200 OHV V6 3.8 250 2815
Lexus SC300 92-00 225 DOHCI6 3.0 293 3290
Mercedes SLK 00-03 218 SOHC V6 3.2 273 3065
Mazda 6 02-04 218 DOHC V6 3.0 273 2915
BMW 635 83-84 200 DOHC I6 3.2 260 2925
Acura Type R Integra 98-01 195 DOHC I4 1.8 234 2500
Lexus IS300 01-05 215 DOHC I6 3.0 280 3145
Acura TSX 04-06 200 DOHC I4 2.4 250 2815
BMW M3 88-91 192 DOHC I4 2.3 240 2700
Mitusbishi 3000GT SL 94-99 218 DOHC V6 3.0 273 3065
Mitsubishi 3000GT
nonturbo
91-93 222 DOHC V6 3.0 278 3120
Toyota Celica GTS 00-02 180 DOHC I4 1.8 225 2380

WarrenW

Nice find Jeremy, thanks.

Warren

jlucas

Is 276HP from headers, no cat, intake & stock ECU box (what ever you can stuff in it) realistic?

twohoos

So an S2000 would have to weigh 3005 lbs??

jlucas

because of the power estimate, which is why I ask if that's a reasonable power expectation

mikegarrison

I'm thinking "15%? No", but I can't be certain. Did SCCA have any data to base that on or did they just have a single "stock to race" factor that they applied to all the cars? Most cars aren't as highly tuned as the S2000 right out of the box.

Then again for the Acura RSX-S they assumed 25% increase was possible. And they gave it even more weight than the S2000. I would love to see a rationale for those numbers and those weights.

They think an Integra-R will make 234HP and should weigh 2500, while they think the RSX-S will make 250HP and should weigh 3665. 1165 extra pounds for making 16 extra HP? Is there a typo here?

jlucas

That was my thinking too. I'll have to get with UL and get some data for them. You would think torque would need to be in their formula somewhere.....

krazik

276 at the crank? yeah I'd say thats pretty realistic with an ems, there are no ecu's that fit in the stock box so if thats a requirement for ITR then no its not very realistic unless we all upgrade to 06 s2ks with flashable ecus.

I knew this was in the works, glad they've started.

-Ry

jlucas

This is not realistic unless you are changing everything into a body shell only and they add an update/backdate rule (which is not on the table for ITR). All the electrical is different in 06. DBW, fuse & junctions boxes, cam bus communiction, cabin harness, engine harness, etc.... It was already investigated heavily for the pre 06 cars running in T2 that really need to be able to edit the stock ECU (legal in T2).

twohoos

The RSX-S weight must be a mistake. All the other cars are right about 11 lbs/hp (spec wt/IT hp), but the RSX-S is at 14.7.

Here it is sorted by power to weight. In that light, the S2000 is pretty reasonable; but I still wonder how practical it is for a club racer to add enough ballast to get the car over 3000 lbs!

Make Model Year Stock HP Engine Disp. (L) Flywheel IT HP Rounded Spec Weight Wt/Pwr
Toyota Celica GTS 00-02 180 DOHC I4 1.8 225 2380 10.6
Ford Contour SVT 98-00 195 DOHC V6 3.0 244 2590 10.6
Mazda 6 02-04 218 DOHC V6 3.0 273 2915 10.7
Acura Integra Type R 98-01 195 DOHC I4 1.8 234 2500 10.7
Ford Taurus SHO 89-95 225 DOHC V6 3.2 270 2890 10.7
Nissan Maxima 00-01 227 DOHC V6 3.0 284 3040 10.7
Honda Prelude 93-96 190 DOHC I4 2.2 238 2570 10.8
Honda Prelude 97-01 195 DOHC I4 2.2 244 2640 10.8
Acura Legend 91-95 230 SOHC V6 3.2 288 3135 10.9
Honda S2000 00-03 240 DOHC I4 2.0 276 3005 10.9
Ford Mustang 99-04 190 SOHC V6 3.8 238 2670 11.2
Mitsubishi 3000GT nonturbo 91-93 222 DOHC V6 3.0 278 3120 11.2
Mercedes SLK 00-03 218 SOHC V6 3.2 273 3065 11.2
Mitusbishi 3000GT SL 94-99 218 DOHC V6 3.0 273 3065 11.2
BMW 330i 00-04 225 DOHC I6 3.0 293 3290 11.2
Lexus SC300 92-00 225 DOHC I6 3.0 293 3290 11.2
BMW 328i/328is 96-99 190 DOHC I6 2.8 252 2830 11.2
Lexus IS300 01-05 215 DOHC I6 3.0 280 3145 11.2
Porsche 944S 87-88 188 DOHC I4 2.5 226 2540 11.2
BMW 325i 92-95 189 DOHC I6 2.5 246 2765 11.2
BMW Z3 97-00 189 DOHC I6 2.8 246 2765 11.2
Porsche 944S2 89-91 208 DOHC I4 3.0 250 2810 11.2
Porsche 928 78-82 219 DOHC V8 4.5 274 3080 11.2
Nissan 300z 89-96 222 DOHC V6 3.0 289 3250 11.2
BMW 635 83-84 200 DOHC I6 3.2 260 2925 11.3
BMW M3 88-91 192 DOHC I4 2.3 240 2700 11.3
Toyota Supra 87.5-92 200 DOHC I6 3.0 260 2925 11.3
Toyota Supra 93-97 220 DOHC I6 3.0 286 3220 11.3
Acura TSX 04-06 200 DOHC I4 2.4 250 2815 11.3
Chevy/Pontiac Camaro/Firebird 97-99 200 OHV V6 3.8 250 2815 11.3
Porsche 968 93-97 236 DOHC I4 3.0 271 3055 11.3
Porsche Boxster 97-99 201 DOHC F6 2.5 251 2830 11.3
Porsche 911SC 78-83 180 SOHC F6 3.0 225 2630 11.7
Acura RSX-S 02-04 200 DOHC I4 2.0 250 3665 14.7