well let me introduce myself.

I am looking to build a race car and the S2000 is may be an option
Before buying I would like to know from the one that have one and upgrade it.

1st I want a light car.
how much weight a S2000 when you have remove everything you can. Carpet, dash board, AC, glove box, door panels, catback, etcc.
Just keeping what you need to race it.
A roll cage will be added

2nd Power
How much horse power can you expect staying safe. a race cession is 30 mn.
so for 30mn the engine will be under load. It is not pulling only 10 secondes here
An intake and exhaust will be installed and ECU

3rd brakes.
Are the stock brakes enough. if not how easy is it to install brembo 4 pistons caliper

4th.How much cost a limited slip differential

5th Is it to chnage the ratio of the rear end

For the suspension I think I am going to find whatever is required easily. sway bar shocks, spring

 

BTW I forgot to mention
I will buy a used one and will not care too much about the condition as I will tear it down and install a lot of new parts same for the mielage as I will change a lot of parts.
Forged piston, agressive cams shaft, very light flywheel, racing clutch.
etc....

 

You should be down to 2,500 or lower with everything removed and with light weight parts such as lighter exhaust, wheels, etc.

For power, I think simple bolt ons (intake header exhaust) are enough. And they're reliable and easy/cheap. Honestly, you would cut down your laptimes more through handling vs power.

Stock brakes are enough for racing. Just get better brake pads and brake fluid.

About $1500. But the S2000 already comes with a Torsen limited slip differential which should be more than enough for a beginner racer.

I wouldn't bother changing the ratio of the rear end. The S2000's gearing is very nice and anyways, in the end it all depends on what track you run on.

For suspension, the stock suspension is enough. But if you want to be fast, then focus on handling instead of power. So all you really need to be really fast are coilovers and large tires.

 

oh and the internals are already forged so no point in get forged pistons... you could always get a stroke it....

It seems as though you don't know too much about S2000s though so I would spend some time researching on here

 

thanks for your reply but I forgot to mention:
I have a C5 with full T1 suspension (race) and 490RWHP.
The car is fast but heavy. The project is not finish (I need to strip it and add the cage). The car is now 3000lbs and I could save an extra 200lbs stripping was left. but 2800lbs is still too heavy.
I do not fit in a lotus elise or I will have bought one (6'4")

Now to answer your comments.
Coming from 490RWHP I will be dispointed with less than at least 260RWHP which I think you can get easily on a S2K engine.

Brakes I really want good brakes. It is easy to adapt brembo 4 piston.

As far the weigh 2500lbs I am disapointing are you sure you are talking with AC and all parts not require on a track removed.

 

260rwhp wont happen n/a from a s2k unless your dropping money then reliability is just a guess.

 

supercharger should get you close to 300 whp and be pretty reliable... With more mods superchargers can get over 400 whp... but if you want more than that you may have to go turbo which is slightly less reliable, but then again I'm sure you can get a reliable 300whp out of a turbo too, you'll just have some lag

 

Well, Krazik, a member on this forum, has an all out race S2000 that weighs around 2450 lbs with a full tank of gas and a full roll cage. So that means his S2000 would be in the 2300 lb range without the full cage.

Match that weight with a FI setup of around 400 whp and you will get a hp/weight ratio beyond that of your C5 (and top of the line handling). But then, even with 260 whp at that weight, I'm sure that's quite enough, especially for S2000s since they make up for their speed on the straights through the corners.

 

as some have said 260whp in an N/a is NOT easy or cheap
most likely you would have to stroke the motor, get agressive cams, do ITB's, upgrade the fuel and management, +all of the boltons
with a setup like that reliability kinda goes out a little
and on top of that if your aggressively tracking it your probly going to need to beef up the rear end as well since S2k's have been commonly reffered to as "glass"

also BBK's are for heat dispersion, they will not "brake better" they will just maintain the capibility to brake longer by limiting brake fade

If you want to brake better then get better pads, rotors, lines and most commonly forgotten good tires

 

I think if your questioning it and not completely sure than the s2000 might not be the best option for you.