DOHC VTEC Heads

[NAiL05]

His version is prob the NA H23 with the H22 Head...

[The G-Man]

What about the H23 VTEC?(He just won't give up will he? lol) Yea I know it's rare but I'm sure they're around somewhere.....

And deev while you're around, since I'm a total noob on the subject of head swaps I might as well push the envelope and ask what about the F20C? Yea yea I know I know but a head is a head right? Even if it does sit longitudally. More high compression?

H23 VTEC, F20C and H22 all share basically the same head.

Still not worth it for head swaps.

Oh and, on a head swap, intake, catback, and header you still will not be in the 175-200 range. More like 150-160.

[H23Accord]

It bolts up, you just have to modify coolant passeges (that goes for all of them).

The H22 and F20B heads make their power up high, using a high compression block. Put those heads on a low-compression F22 block, with internals that shouldn't rev past 6500 or so, and you won't have anything worthwhile. Save up for a full motor and do it right, or don't bother. Hybrids don't do much for us.

If you want power NOW for about $500, get a nitrous kit.

The modification of passages goes for almost all of them. I had to cross reference this with Wagalude but the G23vtec(F23 block/H22 head) and G22Vtec(F22 block/H22 head) both needed modification to passages in the head on the driver side. The G23vtec needed a modification to the crossover tube/black pipe behind the head) using a mix between the H22 and F23 pipes. Can't remember if this was needed on the G22vtec but I don't think it was.
My H23Vtec needed no modification other than the removal of an oil control orifice plug on the block. It is about as close as I can think of in terms of a direct head swap without the need of modification.

[deevergote]

H23 VTEC, F20C and H22 all share basically the same head.

Still not worth it for head swaps.

Oh and, on a head swap, intake, catback, and header you still will not be in the 175-200 range. More like 150-160.

The F20C does not share the same head as the H22. The F20B does. As does the H23 VTEC, as you said.

The F20C is an F series in name only. It shares nothing in common with the Accord motors, as far as I know. You can use the oil filter, that's about it! If I'm wrong, someone please correct me...



A headswap is just about as reliable and expensive as a DSM turbo setup... the DSM turbo setup will make more power, though. It'd probably be wiser to go that route. Either way, the motor WILL quit on you eventually. A full swap is the only way to retain stock reliability.

[The G-Man]

The F20C does not share the same head as the H22. The F20B does. As does the H23 VTEC, as you said.

The F20C is an F series in name only. It shares nothing in common with the Accord motors, as far as I know. You can use the oil filter, that's about it! If I'm wrong, someone please correct me...



A headswap is just about as reliable and expensive as a DSM turbo setup... the DSM turbo setup will make more power, though. It'd probably be wiser to go that route. Either way, the motor WILL quit on you eventually. A full swap is the only way to retain stock reliability.

Oh yes fuckup on my part. F20C is the S2000 motor, duh.

[shadetreecustom]

its not a point of internals that want handle the revs for the h23 and the f22 share the same crank and stroke after many powwows in wagaludes shop we came to to an agreement..........NOT ENOUGH OIL PRESSURE.........in my personal um should i say adventures ive only spun bearings and thats all h23accord has done so dont count out the frank motors its just a matter of time before we decide prove to everyone that it can be as good of a motor as the ls/vtec not everyone can dump a 1000.00 into a block to get it sleeved and then another 800.00 to a 1000.00 in pistons and rods (unless someone pulles out in front of you and you crunch the front of your car up pretty good dont laugh Adam) the oil returns have to be plugged on the drivers side of the head and a hardwater pipe has to be fabed up ..its not as hard as everyone makes it out to be but its no cake walk either research and decied if you wanna take the chance

[Joey GT-R]

My H23Vtec needed no modification other than the removal of an oil control orifice plug on the block. It is about as close as I can think of in terms of a direct head swap without the need of modification.

By H23 VTEC do you mean the H23 Bluetop and took that head and put it on an F22 block or you took a H23 block and swapped the H22 head on?

[NAiL05]

H23 block and H22 head.

[Joey GT-R]

Crap, guess I lost this battle. Maybe I'll just go for a DOHC swap like from the F20 H23 or F22B, should be easy to bolt up.....

[H23Accord]

its not a point of internals that want handle the revs for the h23 and the f22 share the same crank and stroke after many powwows in wagaludes shop we came to to an agreement..........NOT ENOUGH OIL PRESSURE.........in my personal um should i say adventures ive only spun bearings and thats all h23accord has done so dont count out the frank motors its just a matter of time before we decide prove to everyone that it can be as good of a motor as the ls/vtec not everyone can dump a 1000.00 into a block to get it sleeved and then another 800.00 to a 1000.00 in pistons and rods (unless someone pulles out in front of you and you crunch the front of your car up pretty good dont laugh Adam) the oil returns have to be plugged on the drivers side of the head and a hardwater pipe has to be fabed up ..its not as hard as everyone makes it out to be but its no cake walk either research and decied if you wanna take the chance

^^^^This is the guy that built the motor that you want to build joeygt-r. As he mentioned, it is no cakewalk but it can be done. Upgrade your bearings and supply more oil to the block and it shouldn't break. We try to put the beat down on our Franks to find out the problems so you don't have to. Shadetree likes to rev to the moon and will make the neccessary arrangements to make sure he can do so with his Frank. If you want an easy direct swap with no fabbing or real modding though, H23 block with H22 head is way to go.

[deevergote]

Crap, guess I lost this battle. Maybe I'll just go for a DOHC swap like from the F20 H23 or F22B, should be easy to bolt up.....

If you want a car that will definitely be reliable, that's your best bet... just be sure to get the motor from a reputable dealer (even if it costs a little more!) www.hmotorsonline.com is the way to go.

The frankenstein motors are cool to play with, but they aren't the best idea for your only daily driver. It'd be great to have an H22/H23 turbo frank as a project car...

[Joey GT-R]

^^^^This is the guy that built the motor that you want to build joeygt-r. As he mentioned, it is no cakewalk but it can be done. Upgrade your bearings and supply more oil to the block and it shouldn't break. We try to put the beat down on our Franks to find out the problems so you don't have to. Shadetree likes to rev to the moon and will make the neccessary arrangements to make sure he can do so with his Frank. If you want an easy direct swap with no fabbing or real modding though, H23 block with H22 head is way to go.

Excellent, wagalude is only 4-5 hrs away. I'll just drop my cb7 and off and tell em to call me when he's done, lol.

Oh and deev I meant just the heads.....:P

[deevergote]

Oh and deev I meant just the heads.....:P

Right. A Frankenstein motor is what you get when you put a head on a different block. If this is your only car, and your daily driver, I wouldn't recommend it.

[H23Accord]

Excellent, wagalude is only 4-5 hrs away. I'll just drop my cb7 and off and tell em to call me when he's done, lol.

Oh and deev I meant just the heads.....:P

If that is what you wish than that can indeed be arranged. I never had any problems with any of my Franks other than me spinning bearings because I starved them of oil. I learned my lesson and will make the neccessary precautions though for the next one. As long as it is built for the way you drive, you won't have any problems with them.

[shadetreecustom]

Right. A Frankenstein motor is what you get when you put a head on a different block. If this is your only car, and your daily driver, I wouldn't recommend it.

i wouldnt recommend it as a daily driver right now cuz they still have bugs and nothing should be a daily driver if its gonna be your HOT ROD those r for days when you say ah what the hell lets the gurl out for a spin