Spartikus

That's pathetic for a 2.5L. I didn't know that they only made 10 more whp than versionJDM is with just a couple bolt-ons. If you wanted to, you can do the k24/f20 conversion. I don't see how it would be different...

Also, you put all the bolt-ons to a K20 and end up right around where an F20 is stock, so I'm not really seeing the benefit. An F20 with bolt-ons has proven to put down 20+whp more. I think what it really is coming down to is that it's taking time for people to figure the engine out, and because of the early years where everyone was trying to make power with intakes and dual exhausts the stigma has stuck that they don't make power. I'll be glad when/if those cams come out and 250whp becomes the standard for good n/a power.

When I bought an S2k I was in the camp that thought the car couldn't make power. Over time I've been convinced that the car is indeed good for tuning(even with relatively little $$$) and that it wouldn't be such a bad idea.

Johnny Sack

"...........and he called Spartikus to be one of his apostles."

you have to remember too, that that 2.5l is making 240whp with stock exhaust and intake running a stock ecu/ with minor vfac2 adjustments. there are big blocks with 3in singles, EMS making 260+whp all say. that VQ35 hp from a 2.5 litre 4 banger. that kinda power in our 2800lbs makes a car move, with throttle response to get a boner over.

Spartikus

I see now; I assumed that someone that would go through the trouble to stroke the engine to 2.5L would also have the sense to change the intake, exhaust, and ECU out.

Johnny Sack

i well modded stroker with BPU's and a EMS tune can tickle 300whp.

Spartikus

Which brings me to my last question: And the K20 is better HOW?

Johnny Sack

its not. it has some better tech on it, but at its basic structure its IMO inferior to the F20c. it doesnt have forged interals, which is VERY apparent when they are boosted. the reason there is such a K- fanboi following because its gravy to tune. with VTC allowing you to adjust timing w/o cam gears its easy to get tq of them, but hp to hp i just havent seen equally modded K's out gun F's. dont get me wrong its an amazing motor, but its amazing because its got F20 DNA.

stealthx32

It's "better" mainly because of the size of the market. Bigger market = more room for competitors = faster development & lower prices. K20A's w/ mildly aggressive street cams + a tune consistently net you 220 whp. Parts are cheap, and i-VTEC gives you a broader torque curve w/ the ability to change the cam phasing.

MINES13

Well, I went to purchase an F20C head bare from honda... 1800 dollars. The K20 head in the new Si is only 300 dollars bare. There are no serious manufacturing differences between the two, the price is based purely on the amount of spares actually produced.

negcamber

If you are referring to Version's 20whp gain...that's not typical for his mods. Version has one of the strongest S2ks out there...others who slap those same mods on are probably going to be disappointed to see the normal 5-10whp gain. Hell...I followed the exact model of a guy who got 18whp gain...same parts...same year car...everything...I got 10whp...which is typical for bolt-ons and a good tune for the car.

But I agree...not nearly as much development has gone into aftermarket increases for the S2k. There just isn't enough demand to justify the work and then the cost of the parts has to be higher so the R&D can be recovered.

I don't doubt that eventually the F20 will put out similar numbers to the K when modded in the same way. Problem is, right now you can't mod them the same way...the K has much more tuner support and research being put into it.

So...what is the advantage of the K you ask: Cheaper to buy...cheaper to mod for the same or more power...well tested cams that work...well tested and widely used engine management that includes ability to manage iVTEC...and then iVTEC itself.

jasonw

Not to debate which motor has the most potential with mods x+y+z, I am just wondering why people keep saying the K20 is cheaper...

You can get a JDM F2x+tranny+ecu for $4k + shipping

Whereas a K20A+tranny+ecu will run you $5.6K + shipping and a K20A2 is the same $4k + shipping...

Now you just have to figure if it costs less to make the extra 40HP from the K20A2 than it does to get a working FWD tranny on the F2x... I know I'd always prefer to have 240 from the factory than 240 modded...

Prices are from hmotorsonline...