xda2000

i was wondering which mods without FI could achieve this. Mine is a JDM version and i believe it produce 247HP stock.

Thanks

steven975

port the head, port the manifold, get a bigger cam and upgrade the valvetrain for a slightly higher redline (9300 or so).

Then, get a AEM engine management system to work it all.

I doubt you'll need an intake or header as the stock ones are excellent; a single exhaust may help.

With all that, 300 is possible. you may need a fuel pump and injectors...maybe.

mxt_77

In addition to steven975's comments, I'd say that an intake is necessary, but maybe not a header (although a header that specializes in peak power will help you hit your peak hp goal). A high-flow single-outlet exhaust (or a header-back exhaust like the Amuse R1000) would be necessary, too.
300hp at the crank is approximately 240whp, which is definitely do-able. It'll be challenging to do it without tearing into the bottom-end, but I think it's possible.
You have the advantage of slightly higher compression, so run high-octane fuel and use the aftermarket ECU to take advantage of it and 300 crank hp can be yours.

Nobody

FI will get you 300 at the wheels and is reliable as all hell. Why spend 3x the $$$ for a what would most likely become a fragile and underpowered machine? Farting on your way through the quarter mile has about the same effect as going with a full Mugen NA setup.

Unless you're a rich man entering an NA hp per liter engineering contest, consider a Comptech blower.

xda2000

From where I live, supercharger is not an option as not a single shop here sells them. I'm more than happy if foreign vendors are willing to ship them here. But then again, shipping + custom fees cost a hell lot of $$$.

bilkanin

[QUOTE=Nobody,Aug 14 2004, 07:17 AM] FI will get you 300 at the wheels and is reliable as all hell.

alexf20c

If the car can't spin the tires from a 60mph roll, it's underpowered.

mxt_77

I agree w/ bilkanin for the most part except for his statement that it is cheaper to go NA.
First of all, let's assume that the person doing this buildup isn't doing their own work, so they have to pay labor. It'll probably cost several hundred dollars just to have the head pulled and re-installed. And the cost that you quoted for the headwork is way low. I'm guessing you couldn't get good work done for less than $1500-$2000. Add the cost of parts: $1200-1400 for Toda cams & valvesprings, $400 for valves and seats (even more if you want titanium). $300 or so for manifold porting. Exhaust: $600-2000. There is a lot of stuff I haven't mentioned, but I wouldn't expect to be able to make 300 crank hp on an F20C for less than $5K. For about the same price, you can put down 300 hp at the wheels with a supercharger.
I'm not saying that a supercharger is the way that everyone should go (heck, I'm several thousand dollars into my own NA journey), but I will say that it is more economically sound (on a dollar per horsepower basis) to go with forced induction.

Back to the original question: If the search function works, you might try searching for archaic posts by Hams2000. As far as I know, he still holds the claim for highest NA hp for an F20C... which I believe was 237rwhp on a dynojet dyno. There is one thread that lists all of his mods, and if I come across it, I'll post it here.

Ahh.. found it. Here ya go:
https://www.s2ki.com/forums/index.php?showt...dpost&p=1107298
He mentions his bottom-end buildup that he was working on, but as far as I know, he never posted the results of that quest. And then he vanished.

alexf20c

So you mean that if I stay all motor, I can't go any faster than a 300whp supercharged S2000? Even if I rub the engine with cheetah blood?

mxt_77

I didn't say that.
But, if you want to put down 300whp without forced induction, you're going to have to spend a heckuvalotta money, and the car will not likely be street legal when you're finished.

By the way... where can I get some of this cheetah blood? That sounds like a sweet mod.