ABCVTEC

Not trying to start a cfm debate, just curious as to whether this is possible or not. I remember reading that the head gaskets are identical and both motors use timing chains. However, I have read that the K-series cams are chain driven and our cams are gear driven. But since I'm using some K parts is it possible to use the K timing chain?

While I put K20 head, I think I would be more likely to use the K24 head as that motor is 87x99 versus the 86x86 of the K20.

Reason I'm even thinking about this is because:

1. The aftermarket cam choices for the K heads are far superior
2. The K20 head has VTC
3. I'm building a whole motor from the ground up, so why the F not?
4. I'm going to be getting head work done regardless so cfm is not important
5. I'll be using a K24 crankshaft and K PRO for the build, so this may simplify things

I'm sure it would be a matter of dimensions and what not as to whether this is possible. Obviously, it will cost a lot of money, but I'm building a 2.4L motor anyway.

Discuss.

PS: I did a search. All I came up with were threads that almost discussed it, and then turned into a cfm war.

Mor.gan

And they all said... No.




Look at the K20 Head



And now the F20c Head




You would seriously have to modify the entire setup to get the chain to work.

Mor.gan

Also you are wrong in this department. One of the guys from Inline Pro stated that they use similar cam profiles for the F2x and the K2x motors when they are building high HP motors.

ABCVTEC

Actually they didn't all say no. And supposively there is a racing family out there that has done it, although in a race application. Also there's apost from Church saying how similar the heads are to eachother. Obviously, as I already had stated, one of the big differences is the gear driven cams versus the chain driven cams, so I don't know why you posted those pictures...

Sorry, allow me to rephrase:

The off the shelf, after market, existing, non-unicorn, cams are far superior for the K series.

S2Kage

its been done several times and pointlessly so if I might ad...**** the CFM numbers... the K20 head has more aftermarket support because it isnt as "good" as the F head stock. So what maybe you can squeeze 5-10whp out of some IPS cams over what the S2000 would have with a built head and stock cams. Why dont you find someone to build you an F20 head with shitty cams then go put some stock cams so you can feel a ....mild difference.... Like I cant believe people still do not understand logic. This is not a big block v8, ur not going to see even a comparable figure even with a fully built head + adjustable cam gears + a ridiculous tune.

LostMotion

It would be easier to develop an aftermarket VTC system then to do this.

Think HKS V CAM:

http://www.nengun.com/hks/v-cam-system-step-1-a-b

S2Kage

lol damn, and to think I thought that just a nice vtc sticker on my fender would work... very similar to the Vtec stickers and their incredible horsepower increases on typically non-vtec hondas.

ABCVTEC

Interesting setup but I see that's for SOHC setups.

LostMotion

THE RB26DETT is a DOHC engine.

The costs might be too high to have a large market, but V Cam for the S2000 would be quite well received I think.

ABCVTEC

I agree. The torque benefits from VTC are unmatched. But it appears nobody wants to make cams for this motor, which leads me to wanting to bolt up a K20 head

Is there something I'm missing as to that this might not be as complex as I think? What all needs to work?