ok, so we got a 01 accord EX 5 spd coupe. and this other couple we hang out with has on 06 ser spec v, and obviously its quite a bit faster. Ive been reading up on the G23 for a while and decided to try and do a budget build to at least keep up with, if not beat that nissan.

anyways, the F23 has only 70k on it. and since a H22 head bolts on with no machine work to the block (with an 8.8:1 final cr) I dont want to pull the engine, or drop the pan to remove the pistons/rods to rehone and install another hondas pistons or aftermarkets because it adds to the time, work involved, and cost. Ive read that you make more power anyways with a flat top piston and milling the head to get a higher cr than putting a huge domw on the piston.

so does anyone know (using stock H22 cams) how much the head can be milled while leaving enough piston/valve clearance, and not having the timing belt be too long? and what the cr would be around? id like to at least get somewhere in the 10's if possible. and yes I would clay check it before I have it milled but if it isnt possible at all I might not even go this route.

and I have read that a H23 IM bolts to a F23 head, does a F23 IM bolt to a H22 head? I would just port match it because from pics the H ports look much larger. would like to run the accord IM/TB and all to keep cost down initially, eventually may go larger TB or even a better flowing IM, but not now.

car already has an exhaust I had a buddy bend up for me at his shop, I can tell the exhaust ports are different between the H22 and F23 head, will a set of H22 headers bolt up and end right where my current exhaust bolts to the stock exhaust manifold? its only 2.25" that big enough for a G23? I can get it done real cheap but have to drive to cali again to do so. about a 13hr drive.

ECU- I would like to run the stock ecu since ive read it doesnt look for a knock sensor, while the H22a ecu does, and then throws a code and f's with the timing, etc.. as soon as I could afford it Id be searching for a used VAFC. not the best case scenario, but I really dont want to spend the money on some hondata setup and tuning when its not really a crazy build.

cams, I just wanna run stock cams for now at least, and probably wont ever go bigger because of the milled head, but timing... Ive been away from hondas for quite a while, and I think i remember that B owner used to retard the exhaust and advance the intake a few degrees.(hope it wasnt the other way). the milled head already takes care of retarding the exhaust cam, but intake as well, so do I need to only buy one adjustable cam gear for the intake to bring it back to spec or a bit advanced maybe, or do I need to also bring the exhaust back to spec because retarded exhaust cam doesnt work well with the H22?

parts I think I need.

H22a complete head and dist.
H22a crank pulley/gear
H22a PS bracket
F23 headgasket
H22 header
adjustable intake cam gear
H22 timing belt(hopefully not too long with milled head)

Ill reuse the clutch/trans, IM setup, ECU, modify the harness and water pipe as needed...

so it should be relatively inexpensive, I figured somewhere around 800 bucks if I can find a good deal on the head

sorry for the long post but I got alot of questions and figured this is easier than posting 10 new individual threads.

also, just an estimate, but would a 10.5:1 G23 VTEC with I/H/E and a VAFC running it(somewhat) be able to lay down 200? or not with the stock IM/TB/ECU, etc....?

not sure why but I cant let that damn nissan be faster than me. lol

and I will also continue to do my own research and delete questions I can answer for myself. or post the answer so others can find it easier...

thanks

 

(damn talk abouta shot gun blast!)
go with h22a or h22a type s pistons. my brother built a "g" and he ended up having no piston to valve clearence so he put the h22 block back in his lude- so i ended up buying the f23 block and the valve reliefs on the "f" are a lil gumd-up (new valves here i come).
i dunno if he had the head he sold me milled but it "looks" stock. i will post pix 2maro if u want.
IMO)yes get cam gears

IMO)dont bother milling you can always buy a one layer head gasket for a lil more comp. or go with the h22 type s pistons

ecu thread>
https://honda-tech.com/forums/honda-prelude-4/definitive-prelude-ecu-choice-hondata-info-post-567799/

this site can help with your comp. ratio but isnt 100% acurate just gives you an idea where your at.
http://zealautowerks.com/hfseries.html

 

to drop in H22 pistons though, its my understanding that I have to bore the cylinders 1mm over, as well as have the combustion chambers clearanced because the piston sticks above the head .008"

Im trying to do this without tearing into the block AT ALL.

I dont think just a single layer head gasket would bump the compression much at all, at least not enough to help a sorry little 8.8:1.

and if RSX pistons with their fairly large dome(compared to stock F23's) fit with no clearance problems, then Im guessing there should be a fair amount of clearance running stock pistons. I realize though that on the domed piston the relief is cut and the whole valve gets close to the piston and on a flat top, only one edge of the valve gets close so they could theoretically have the same clearance. guess Ill have to find someone whos clay checked it and can tell me what the clearance was.

thanks for those links, Ill go check em out right now.

 

hey just wondering if you found out if the h22 exhaust manifolds donpipe will match up with the f23 catback?

 

no, its the wifes car and she decided to hold off on the project right now, were saving money because we might be moving soon.