F20B Vtec or H23A Vtec

[DRzCB72nr]

im gonna keep it short,

Which would you buy and why. Price are about the same so it doesn't matter.

[bagoon316]

this will come down to revs vs. torque. its gonna be preference.

[DRzCB72nr]

ok i was looking at the numbers both engines put out. So F20 is the highwer reving, h23 is the torquey one.

Which one performs better in the 1/4 mile? or are they about the same

How are the trannys in both these engines?

[BLUBB2]

Also remember that the H23A has Carbon reinforced metal sleeves which sucks for boosting. Just thought I put that in there.

[fatboy1185]

ok i was looking at the numbers both engines put out. So F20 is the highwer reving, h23 is the torquey one.

Which one performs better in the 1/4 mile? or are they about the same

How are the trannys in both these engines?

Stock vs Stock H23a will be quicker in the quarter, due to more torque. Doesnt really matter which motor you buy, if you plan on building it, either one will be quick in the long run.

[DRzCB72nr]

Im guessing there is more after market support for the h23?

[slick]

yes more support for the h23. but your just looking for the older h23 right? not the h23vtec?

i would think the h23 would be a better option for more parts available but hey thats just me

[bagoon316]

I think he is comparing the F20B vs H23 both the blue top VTEC versions.

Both have aftermarket support as both are pretty much h22 heads. I know for sure though H22 valves dont fit in F20B heads as they fall out.

Pistons for F20B is Accord 85mm, rods would have to be custom made as they are longer than H22's. The F20B is iron lined/sleeved so any piston would work. The F20B crank is 55mm mains, so I would imagine H22a4 bearings and all those goodies would work. F20B Sir-T cams or something like are H22 Type S cams so obviously cams will work, also cam gears. Like i said the only thing that doesnt is the h22 valves, something with the stems, they like to fall out.

Pistons for the H23 would be, well, H22/H23 87mm pistons, though these blocks are FRM lined and would require sleeves or the Mahle Gold Series. rods would be H23/F22 i imagine as the crank im sure is the same. someone fill me in though if the H23 blue top is 55mm mains though, im not sure when this engine was "created" and for what years. I'm sure cams from an H22 would work just like the F20B, the only thing im not sure on is the rest of the v/t, i would imagine, the H23 VTEC is the same head as the h22, just a stroked h22.

[DRzCB72nr]

wow bagoon thanks for all the info!, yes im comparing both vtec motors. I was looking at both since they are both familiar and go for around the same price.

I guess im leanin more toward the h23 because of the torque, but damn i do like high revs. Im not really planning on building a motor just yet but it would be nice in the future.

Which one would be better for spray and which one for boost?
i plan on updating my first post so that other members can find all the info in one spot.

[semitas]

if you are going to keep the car i say go with the h22, from what i have heard the h23s and the f20bs are not as close to the h22s as everyone thinks, istead of finding out on my own that they are not the same, i would go with the h22 with the lsd tranny, and if anything happens to it just go to your local honda dealer or other autoparts store and they will have parts for the engine,

but if you just want to experiment i say try either and then tell us about it

[blizzard335]

H23A VTEC, hook it up to an M2B4 LSD.

H23A VTECs came with the MCJA trans IIRC, tiptronic, long 4th gear, great for crusing, but it would give a stock H22A a good run for it's money. trust me.

The H23A VTEC pulls like a train. Not as peaky as the F20B (make sure it's the SiR-T!) and has more torque. Not sure about aftermarket support, since the H23A VTEC is more rare than the F20B T-spec.

The SiR spec F20B is abundant, though, but that one has 180PS.

[semitas]

there is a jdm importer here in Georgia called jhot imports that have had a h23a bluetop for the longest

[EnjoiJDM]

I have been comparing these same motors for the longest! I want to get the H23A but i think its OBD2... Is there a harness i can get to convert it to OBD1? Will my F22 tranny work with this motor?

[gloryaccordy]

H23A VTEC... u throw in STOCK JDM H22A cams, u will make some good power. F20B is a screamer for sure but the H23 has so much more potential for power, plus its a better match with the heavy Accord body.

[90Cb7sleeper]

I have been comparing these same motors for the longest! I want to get the H23A but i think its OBD2... Is there a harness i can get to convert it to OBD1? Will my F22 tranny work with this motor?

You can use the stock accord f22 harness and
1) use obd-1 h22 injectors
2) solder the obd injector clips onto the accord harness
(cp[mike] IIRC has done this, and i think Night Wolf as well)
only other thing you would need for ease of swapping would be an obd 1 distributor (which i have two of) to keep it plug in play. This is as far as electrical/obd-1 goes.

both engines are obd-2 and both had electric power steering so if you are going to keep power steering you will have to source the h22 bracket/pump/line.

Back to the original topic.

I was going to go with the h23a to begin with, but for the cost i just went h22.