I've been researching cars, and fell in love with the S after driving it, and comparing it to the M roadster and Boxster S. I've also owned an 01 cobra, may it rest in peace. Going to buy an S while I'm overseas in a tax exclusion (the Gulf) zone, to save a few grand on the thing. Ok...here's where it gets to technical stuff...

After some looking into the vortech, comptech, and speedcraft kits, I've noticed they all only run 6-7 psi boost max, due to the high compresson ratio of the F20C. Some quick math tells me that can lower the compression ratio to 9.0 to 1 with either a cylinder head gasket that is about 1.3 mm thicker (which is alot) or with shorter pistons. Anyone have any ideas as to how much boost the engine can tolerate if I do this? I'm curious to see if any speed shops you know out there have given this a try, and what their results were. I've noticed some complaints with the speedcraft kit's copper gasket, and wondered if anyone makes a shorter piston for the S.
Also wondered if anyone had any info as to whether the Jackson racing roots blower would bolt up to the F20C... yes, I know I would need to remap the fuel curve... just curious, cause I'd like the added torque of a roots blower. Basically, the theoretical goal here is to make an S that would match a viper for speed. I know I would need to beef up the clutch, tranny, and rearend... Gotta know if I can safely make the power first, though. I love the S, but am starting to get pulled towards the brute force of the new 03 cobras...
Thanks, appreciate any and all info given. I've been watching these forums for a couple months, and have been very impressed with the community... Hopefully Ultimate Lurker will have some advice on this one, too.
--Cade

 

You'll find plenty of technical discussions on SC stuff by using this:

 

Roger that. Thanks.
-Cade

 

[QUOTE]Originally posted by MotorCade
[B]Roger that.

 

The JR blower rotates the opposite direction. You could devise a kit using an Eaton blower or better yet, a whipple.

 

using a different head gasket to lower compression is not a viable solution.
do what wesmaster said...

 

Yup, I don't really want to go the head gasket approach. Sorry for the typo in my post, btw. It would have to be closer to 2.3 mm thick, not 1.3.
I've been reading through the comments from cjb80, and one of the concerns I noted was that the block would have to be sleeved and closed. Any guesstimates as to how much this would cost? I can assemble the motor, but I don't have the hardware handy to do major machining.
Also didn't know that the JR supercharger went the wrong way... So now the problem with a roots blower is making a manifold and fitting it in with the brake cylinder in the way. Neither of these are easy problems to fix.
Thanks for the info, I'll keep mulling this over...

 

Don't make life hard for you. Your car will spend endless hours in the shop if you want to hunt vipers. The s2000 in not a fast car. Yes I own one, but it's one of the slowest in a strait line I've ever had. But what it does it does well. Even at 30K it's the best bang for the buck in the segment, look at the alternatives. If you want to open a can a whoopass on the big boys start of with one of the big boys. Get the 03 cobra, put a lightening pully, exhaust, filter, some chip and play with vipers all day without worring if your engine will blow because you don't know if you added enough race gas the day before.

Sam

 

Yeah, more of an exercise in theory than anything, here. Curious to see what it would take. I've never done a small displacement high performance engine, and was considering the project. From what I can tell, it would require a massive amount of cash, and even then it's a toss up. What I'm hearing from everyone seems to be to the effect of S2K is fun, it corners great (which I got to test drive first hand) but it doesn't sound like it is built sturdy enough for more power. On the other hand, 500 dollars worth of aftermarket parts for the new cobra will make a monster car. Too bad the cobra is ugly when sitting next to an S. Ah, well.

 

[QUOTE]Originally posted by MotorCade
[B]Yeah, more of an exercise in theory than anything, here.