The bigger displacement was from "stroking" and thus, Honda felt it was necessary to lower the redling by 1000 rpm to preserve engine safety and reliability.

It may start to make more power lower down but it ends up making the same power at redline, thus the same HP rating as the "old" engine.

A S/Cd '04 still makes its power in the upper range of its rpm band. Also, consider that Comptech made a slightly smaller pulley for the '04 to compensate for the reduced redline. A comparison between '04 and previous models is not quite as simple as just reading the "brochure".

 

I understand that but these conditions aren't exclusive to turbocharging. I think a more indepth analysis is in order. Now If we can only get Honda to "lend" me 2 S2000s and about $50K...

 

In my experience, I would go SC if my car was my commuter car. Even then, my first choice would be 4.77 gears and 2.2 block with an EMS. The beauty of this setup is I can put my stock ecu in when needed.

A SC has less worries and has been proven to work well with the stock ECU. On the other hand, a turbo must use an EMS for it to operate well. This will be more down time for tunning and would require HIGH MAINTENANCE AND TIME.
Your best bet for a turbo would be LOVEFAB setup as it is a complete turbo kit if you must go turbo.

I went turbo(LOVEFAB setup) because I have nasty winters here in Nebraska and during the winter I can mess with the car since I dont drive it. I do drive my car all summer though and have had no problems with it. To get where I am now took a lot of down time and $$. But to me its worth it, I love my turbo .
The only question now is, is it worth it to you?

PS xviper has had his SC for a while now and drives year round in crappy winters with great success. Cody is I think, one of the few if not only person whos s2000 is his daily driver and is turbo. Keep an eye out for these two and see how long they last

XVIPER, I just read your post on RPM and HP with the different setups. At 4000 rpm I see NO boost. In order for me to see boost I need to be on the gas pretty good. One of the main reasons I went with a laggy turbo, less stress daily driving.

 

Your post also comes from experience and contains some wisdom. Your opinion is unbiased and is made without rampant emotion. I commend you.
Those numbers I posted are based on dyno runs where it's "pedal to the metal". Turbos (also superchargers to some extent) are very dependent upon throttle position.
The big difference between a Turbo and a S/C at 4000 rpm (both at WOT) is that the turbo is adding a goodly chunk of HP and torque, whereas the S/C is still suffering from having to drive the blower and is getting no return for the investment. In fact, the blower is actual taking more power than it is giving back, hence, my conviction that a turbo adding nearly 50% more power at that rpm where there is no added power (S/C) is going to contribute to wear when there was none before (addressing a previous discussion from this point on). HP and torque make heat, gives more "push". More heat, more work being done all contribute to more wear than if you didn't have the addtional input before. It's just common sense and a fact of life. If you think you don't get more wear on a nail head by pounding it with a 6 pound hammer as opposed to a 10 pound hammer, you live in a world where the laws of physics do not apply.

An interesting clip on HP TV this morning:
In the world of drag racing where we're talking HUGE HP, supercharging is still the main way to make power. Turbos are only just coming into its own and are in the small minority. Wonder why?
Why would I bring up drag racing in a discussion about an S2000? You really think people boost this engine to go Auto crossing?

 

I guess what I was trying to say is that if you go turbo, you can have less wear with bigger turbos. First gear WOT I dont see boost until 4000rpm. Full boost from 5000 in first gear. Other gears differ but 4th its more like 3000-4500rpm(0-5.5psi). I am only pushing 5.5 pounds making 313 to the ground.

And I would never go turbo if it was my daily driver.
But if people must go turbo take advise from those on the board, its not the easiest route.
Xviper, you have a lot of experience with SC thats why I refere to you. SC engines do last long and you are a perfect example .

In drag racing, there is no lag on SC dragster. Big turbos have huge lag and some dont produce big HP till speeds above 100mph.

Take care, I'm off to work.

 

Actually, it has nothing to do with what you're assuming. Those cars make about 2000whp which isn't easy to do using turbo's and it's just easier to use a blower.

 

Maybe i will sound stupid, BUT...is there no way to use a boost controler on the S to prevent boosting during cruising on the highway?

 

Yes you could, or you could just stay out of the throttle...

 

if your gun-shy, I'd go with a SC. Less variables. Turbo will always make more power, and making more power comes at a price, irregardless of how it is produced (i.e. SC, TC, NA)

I've blown a motor NA, and it wasn't due to driver error, I wanted more power, I purchased a set of the early Toda Spec A2s, and the installer didn't accurately degree them. ANYTHING you do to get more power is a gamble (read: internal NA work/F.I.), be it due to someone not knowing what they are doing, or added stressors.

I've decided to go with the LoveFab setup over a comptech supercharger, and that was my desicion based not on engine longevity (I'd like it to last as long as it can of course... ) but solely on the power output and the fact that I have a personal preference for turbos. I think a properly tuned turbo setup can theoretically last as long as a SC setup, IF YOU DRIVE IT LIKE A TURBOED CAR!!!! (i.e. stay out of the throttle unless you want to GO!) With proper maintainance, I don't think you'll have any serious issues (read: for a while) so long as everything is done right the first time...

JMO, nothing to do with metallurgy, I'm not an engineer, I'm a legal studies major, so take it with a grain of salt... I will say that I have found this thread grossly entertaining though, and it has raised a few questions that I guess I will have to wait a prolonged period of time to have answered (I really hate that... )...

Good luck with whatever your desicion!

 

Sorry but I have a stupid question now. At 4000rpm, a SC car always sees boost, but a TC car only sees boost upon WOT? Is that true? If so, wouldn't cruising around on the highways at say 80mph lead to more wear on the SC car? Please correct me if I'm completely off.