If you can't modify the fender at all in BSP I think 285s would be veeeeeeery hard to fit without rubbing - especially with very low offsets or spacers :P

Are ppl allowed to trim or emove the plastic liners in BSP at least? That was the biggest issue for me.

Also, would the rocker panel mod be allowed (i.e. not the metal seams)? I found that to be the second biggest problem area besides the liners as far as rubbing.

In fact, I don't think hammering the metal seams in the fender would be 100% neccessary for everyone - I did it on EVOlutionary's aevice and more of a precaution than anything.

When you turn hard (say to the left) the right side wheel will be rotated AWAY from all the rub-prone areas and the suspension on the opposite (left) side will be unloaded, meaning that where the tire might rub the bodywork you'd actually have a little extra clearance between the metal seams and the tire due to suspension decompression on the left (unloaded) side of the car.

Im only getting retentive about this because I know tires are a big big thing

 

PS - are the US Spec crash beams structural or are they just dead weight?

Anyone have pics?

 

we don't have to turn the wheel all the way. the rubbing is really only a problem in the pits.

You can't remove the liners. But holes in the liner that are caused from the tire rubbing on them are ok.

 

^ Man...you guys are lucky in the US then!

We run tight European style couses out here...180s around a single cone and 360 carouseld around a cone

Might as well let the plastic rub away then...the only part I'd really worry about in the fender area as far as damaging the tire goes is the inner rocker panel area.

 

EVOlutionary's car is a Street Mod car He can legally do those mods. BSP rules say you can't change anything inboard the vertical plane of the hub.

Roll fenders and spacer

 

Tricky indeed.

 

Do any nationally competitive BSP Evo 8's run a front mount intercooler? I am looking at a Perrin, which is 10 lbs. heavier than stock. With running race fuel, borla header, buschur exhaust and licp, helix intake, forge bov and boost controller, would there be worthwile gains over stock. I was told yes but am hesitant because I feel without cams and/or a different turbo the stock intercooler is fine. What do you all think?

 

Stock IC is fine. Every EVO that's won a National Championship in any SP class has run the stock FMIC, I believe. . . so it's definitely not necessary to be a contender.

I don't remember the exact wording of the rules, but is your Forge WGA legal in BSP? I think it may not be, but better double check the rules. . .

 

For autox the stock ic is fine. Think about it. Would you want to put a weight at the end of your car? If you road race your car a more robust ic to keep the temps down makes sense.

 

because you can spray water on the ic to cool it down every 60sec or so the stock IC seems to work ok. Not exactly a good weight/performance trade off to upgrade the stock IC.

any WGA is legal in BSP, allowed under the boost control allowances.

 

So what are the potential HP gains from a FMIC in SP trim? Would the HP gains negate the time lost due to extra weight? Do replacement FMIC's install without any trimming or removal of bumper beams etc?

PS Happy Thanksgiving everyone!

 

I have no data to support either position.

My guess is that we can out octane any heat increase from the stock IC. I don't know what sort of gains in reduced pressure loss could be had from an aftermarket IC but i suspect that we're looking at maybe a 1-2psi range.

I'd be far more interested in trying to control intake temps with high octane fuel and water injection and completely removing the intercooler then I would be in trying to custom make an IC that doesn't require trimming of the undertray or bumper beam.

 

^and that idea would be even more feasable with the cooling properties of E85 . . . you may not even need water injection as long as you aren't trying to spin your turbo to the moon . . .

 

I do not have answers yet, but I am working on exact weight of intercooler I want versus stock (considering CBRD, AMS, Perrin). I have been told by Chad at CBRD aand someone else that I could net some decent gains with my setup. Chad claims his intercooler is the lightest out there, so that is my first choice. What I am thinking is maybe adding a few pounds, but gaining 20 - 30 hp. If that is correct, I think it's a worthy investment. No cutting required on Perrin or AMS, I have to verify that with CBRD's.

 

^I highly doubt any intercooler upgrades will net anything close to 20-30hp... maybe 5-10 but nothing considerable.

I am wondering about 1 silly mod I have on my car right now and if the guys at Nationals will complain about it, my RalliArt replica FQ400 side mirrors? Anyone have the low down on if the mirrors are legal or not?

Thanks for the help, hope to see some of you at nationals this year coming up!