VteC - Honda Prelude Forum

[SUB[EX] · 05-11-2002, 11:25 AM

I have a question.
If its possible to put a Vtec Head on a H23. Is it also possible to put a Vtec head from a Accord F23 (sohc) on a prelude f22(sohc)? Im sure this is a totally unique question but i would like to know if its possible. Also on a SOHC vtec, is the vtec actually functional? Isnt the whole point of Vtec the dual cams?
ThanX

Brady92/4WS · 05-11-2002, 03:00 PM

the h23head on an h22 has been discussed a lot of times, search for it. As for the accord the head wont bolt up to the block because they are different series motors, F and H, but in 94+ accords there is a model with vtec and maybe you could put that head on the f22, not really sure though... And, vtec is not dual cams, its more like 2 cams in one,basically at vtec crossover a little thing slides the cam down so then the cam profile is more agressive. Hard to put it into words, but really not that hard to understand if someone is a good explainer.

SiR-P12eLude · 05-11-2002, 04:11 PM

can it be done a VTEC head on a SI motor. That will be called a frankinstien swap, wouldn't it be? But my question is that a VTEC is 2.2 and the SI is 2.3 can it really be done and is there in any difference it you use a VTEC head on a SI? And will the VTEc actually function as well?

[SUB[EX] · 05-12-2002, 12:49 AM

Yes a H22 Vtec head can be put on a H23. But i still need to figure out if its possible to Vtec my F22 with the (accord) F23 head. If anyone has ever tried please contact me.

red92s · 05-12-2002, 05:07 AM

Quote:

Originally posted by [SUB[EX]
Yes a H22 Vtec head can be put on a H23. But i still need to figure out if its possible to Vtec my F22 with the (accord) F23 head. If anyone has ever tried please contact me.

You probably COULD, but why? The F23 makes how much power. . .like 150 hp or so, right? You would probably spend a good deal of money to get something like that to work (reliably), and for only a marginal gain in power.

Quote:

Originally posted by SiR-P12eLude
But my question is that a VTEC is 2.2 and the SI is 2.3 can it really be done and is there in any difference it you use a VTEC head on a SI? And will the VTEc actually function as well?

Yes, the 2.3 head and 2.2 block do mate up after some modifications. I believe that the bore is the same between the 2.3 and 2.2, but the 2.3 has a slightly longer stroke.