Found this in another thread:

- All Stock class modifications
- Usage of OEM parts from other model years
- Any computer control module
- Removal of A/C
- Bodywork to allow fore tire clearance
- Strut bars
- Subframe mount bushings
- Any fully upholstered seats
- Any steering wheel
- Spoilers
- No side skirts
- Rollbars and fuel cells permitted
- Radio removal
- Any wheels
- Any shocks
- Some brake stuff
- Drilled rotors (dunno if rear wave rotors would be legal)
- Any rollbars
- Any springs, suspension bushings, rideheight
- Any 12V battery
- Baffled oilpan and such
- Any intake manifold (ITBs legal? What about the Hondata gasket?)
- Any intake filter
- Emissions device removal (including air injection system, I assume)
- Water injection okay
- And fuel line and pump
- Any exhaust that terminates behind the driver
- Engine mounts can be replaced
- Engine torque damper okay
- Cooling fans modified
- Transmission mounts replaced
- Any clutch
- Any flywheel
- Any shift linkage
- Any differential
- .0472 overbore on engine cylinders (From 2157cc to 2216cc on an F22)
- Balanced engine internals, but not lightened
- Port matching
- Cam timing

 

ITB's are legal.

 

Am I correct in reading that final drive cannot be changed?

 

Only via update/backdate.

The hardtop needs to be Honda/OEM as well, but that would only matter if you ran with it during competition runs. Wing has to go, but you could put on a CR wing if you didn't want to do a spoiler.

 

This. I can switch to the taller automatic FD on the Z, but that is it.

 

So lets see

- All Stock class modifications- Got
- Usage of OEM parts from other model years
- Any computer control module- Haltech can be used! $1500
- Removal of A/C- saves 30 LBS
- Bodywork to allow fore tire clearance
- Strut bars
- Subframe mount bushings- Got
- Any fully upholstered seats- Got
- Any steering wheel- Awesome! $500
- Spoilers $200
- No side skirts
- Rollbars and fuel cells permitted- Saves weight, no fuel starve (fuel cell/surge tank $1000ish)
- Radio removal
- Any wheels- What does the top s2k guy run currently? (custom CCW and hoosiers $4000)
- Any shocks- Got
- Some brake stuff- Got
- Drilled rotors (dunno if rear wave rotors would be legal)
- Any rollbars
- Any springs, suspension bushings, rideheight- Got
- Any 12V battery- Got
- Baffled oilpan and such
- Any intake manifold (ITBs legal? What about the Hondata gasket?)- Saves 40LBS $3000ish
- Any intake filter
- Emissions device removal (including air injection system, I assume)- saves weight
- Water injection okay
- And fuel line and pump- counted cost in fuel rule
- Any exhaust that terminates behind the driver- Got
- Engine mounts can be replaced- Got
- Engine torque damper okay
- Cooling fans modified- saves weight, Can you change radiator?
- Transmission mounts replaced- Have in a box
- Any clutch- Saves a couple pounds $500
- Any flywheel- saves a couple pounds $300
- Any shift linkage
- Any differential
- .0472 overbore on engine cylinders (From 2157cc to 2216cc on an F22)
- Balanced engine internals, but not lightened
- Port matching- more power $1400 (head job)
- Cam timing- more power $550


So more power, less weight, adding hoosier crack, and only needing to be 1.7 seconds faster on 60 second course? Logicly wouldn't the hoosiers give you 1.5 seconds over STR tires? Acorrding to grassroots I think the gain is in that ball park. .2 seconds can be gained with added power/less weight. I could see the S2K doing well in BSP but your talking another $14,000 or so in parts over STR. Sounds like a good directon for someone that gets bored in STR and wants to go faster but it requires a big wallet to make it happen. Having ITBs is a pain in the arse. It would require being able to tune your own car and the car would need tuning just about every time you start it up from what I've been told.


The big question is what size wheels does the fast guy run?

 

your prices and weight estimates are outrageously bad.

 

Bench racing is a dangerous thing in autocross. I don't have 15k in parts on my BSP car.

 

I don't think you even need ITBs to be competitive. Maybe take a STR car (AP2 probably), AP1 flywheel, switch to test pipe, add 18x9.5 wheels, flare fenders, stuff 285s Hoosiers and it might do well. Only way to find out is to run it I guess.

 

I'd go bigger than 18x9.5's. Isn't the Uyeda car on 18x11's?