Looking to boost MY08 in a year or so. I like to do a lot of road course racing so I wonder.... At what point (whp numbers) would your the car no longer be suitable for road course racing? Basically, I see the possibility of a 350whp s2k being faster on a track then a otherwise equivalent s2k with 450whp due to traction issues.

Also what is the recommended tire size/wheel size for a boosted s2k and are better brakes a must?

 

You just need to know how and when to use the hp.
Boost controllers are your friend.
It depends on your turbo size and when and where the torque is there when the turbo is fully spooled.
Remember 350whp is at 9k rpms and you won't be there all of the time so alot of it depends on the power under the curve.

tires depend on the appoication. r-comps for track use. Drag radials for the strip. Bigger brakes will always help in a trtack situation.

Just my .02

 

From what I've read. Turbo set up can be quite unreliable on the track due to the heat a turbo produces. If you read in the racing and competition forums and in here a lot of your questions can be answered. Please don't go starting new threads asking this because it has been answered and talked about over and over.

 

I think you will find that the concensus is that you keep it N/A if you want to race it. Then you wont be punt in a class with built track cars and you can actually have a chance at winning.

Personally I do not plan on doing anymore than a few track day s and autocrosses.

 

I've had a top level autox driver race my car around the autox on low boost (430ish hp to the wheels) and he came in first place on his first run. He said with a little suspension work my car could blow away the modified AWD evos / sti's no problem.

 

If you set up your boost control via speed based or gear based, you can put down alot more power. AEM EMS and Hondata Kpro are capable of offering these boost control methods. The key is to have a low wastegate spring in your wastegate to keep power down in the lower gears, and ramp power in as needed.

 

Interesting how everyone assumes its a turbo question FI is a bit misleading, SC and turbo is two totally different beast.

I cant answer the traction question directly because im still within the tractable range at 325whp SC. But I will tell you that SC is much more "tractable" through more of its power range and thus forgiving in a track car then turbo, and it runs cooler as well. SC is the way to go if your tracking your car for both reliability and tractability, forgiveness etc. I am just one of many that feel turbo is a mistake for a track car. Your going to have a bigger handful with a turbo car since its power curve is so much fatter. SC gives you all the power you need to pull in the straits wile keeping things in prospective out of the corners. The car weighs 2700-2800lbs. 300-350whp at 4k would be more problematic to deal with then at 8-9k

I think the 10psi hi boost KW kit or a 10-15psi centrifugal SC kit like the vortech or Comptec would be the ultimate track set up. You will get a 350whp-425whp car with trq levels between 220-275 that span progressively as the rpms increase making for a very "predictable" usable power curve for the size of the car. Hard for any car to beat on the track.

 

Or a simple SC in other words

 

I agree, it is funny how everyone assumes turbo sorry not to clarify... I am leaning towards S/C most likely kraftwerkz. However, I was curious to this question for turbo cars as well.

Personally, it seems that the tail on a stock s2000 too much for some to control so it seems like a boosted s2k's tail would be much more violet.

What sort of tire width do most go with when putting down about 350whp?

 

[quote name='ChefJ' date='Dec 31 2008, 07:32 PM'] You just need to know how and when to use the hp.
Boost controllers are your friend.
It depends on your turbo size and when and where the torque is there when the turbo is fully spooled.
Remember 350whp is at 9k rpms and you won't be there all of the time so alot of it depends on the power under the curve.

tires depend on the appoication.