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I'd say no to exhaust modifications you're looking at. You have to run the tailpipe to one of the holes in the rear bumper after the cat anyway. Or are you thinking muffler on one side outlet and muffler-less on the other side? I think the added weight and complication wouldn't be worth it and even that might be a no no.The rules are basically saying you can replace the "cat-back" portion of system all you want and can goto a single outlet if original was a dual outlet.I don't think anyone would protest having the uprights left for the wing but if trophy anything can be picked apart that isn't OEM.
The performance gain would be negligible for autox, So I would just run it closed for events which should definitely be legal and enjoy it open the rest of the time. I thought S2000 guys used to just disconnect their catbacks all together.
I always say build the car you want to drive every day, and worry about the RAW scores if that matters to you. Unless you're holding the top of your class or top times of the day, it just doesn't make sense to try mods that conform to the rules IMO.
Eventually I'll be building her for BSP, where I can have the aero, pully's, headers.....
BTW, it is illegal (and extremely unsafe) in any class to have exhaust released underneath the car. You wouldn't pass tech if you tried that.
Quote from: sti-tom on September 28, 2016, 12:44:17 PMThe performance gain would be negligible for autox, So I would just run it closed for events which should definitely be legal and enjoy it open the rest of the time. I thought S2000 guys used to just disconnect their catbacks all together.To meet rules, you need at least a straight pipe to guide the bypassed exhaust to one of the original openings. And you will certainly need a muffler on this straight pipe to meet sound.BTW, it is illegal (and extremely unsafe) in any class to have exhaust released underneath the car. You wouldn't pass tech if you tried that.
Quote from: Jackal on September 28, 2016, 01:15:04 PMEventually I'll be building her for BSP, where I can have the aero, pully's, headers.....BSP does not allow wings, just spoilers without endplates. To get a wing, you need to move up to SM.
As I've learned after the fact like many before me...Street prepared/Street Mod are the cut your fender for stupid wide tires class that tricks people into thinking it is the add power to my car class. It takes a very high level of car preparedness to hope to pax well in those and higher classes.Tires first, then power unless your going to ignore pax like me and then I'd say add all the power you can and have fun!