Roul Rosenow

hi there ppl im wirting you all the way from germany cause i cant seem to find any more information on my project which i mentioned above as my topic.

i´ve read so much about this topic in so many different forums and nowhere do i seem to find an anwser to my question so i decided to ask you direktly


my aim
h22a2 block

h23 finebalanced crank
h23 rod´s
lighweight flywheel
h22a2 pistons
H22 Balance Shaft Eliminator

my question is will the crank of the h23 last the rpm of past 7k after fine balancing

and is it reliable as a weekend car (civic Ej2).

im not a racer type guy but every also often i do want to push the engine

im open for every remark and comment

many regards

kingofbattle909

iTrader: (6)

http://www.zealautowerks.com/hfseries.html

HiProfile

Some Accords in Japan have something called the H23A dohc vtec. It's a factory H23 with an H22 vtec head. They do have lower redlines, but they also ONLY came with automatics and had no oil squirters. Honda considers just one of those things to require a huge reduction in redline.

In the real world, the H23A holds power to 200-300rpm lower than the H22A but makes more horsepower in most cases. In terms of extra wear, the pistons are seeing the same amount of friction at 7200rpm with a H23 crank as an H22 pistons see at 7500.

You'd still be reliable with a 97mm crank from an F23 motor, it's really the FRM sleeves that will eventually cause it to wear out.

Roul Rosenow

thx for the replies


so what your saying hiprofile is ,

i should lower the rev limiter to 7200 an ill be ok .... ?

question is would the crank hold the higher rev after fine balancing i suppose no one really knows.

mhhhh many regards so fa anyway

HiProfile

Not exactly. A lot of mild H22 builds make peak power at 7500rpm, so the same setup with H23 crank will peak at a slightly lower RPM. If the parts you're using usually peak at 8000rpm, the H23 crank will likely peak a bit lower.

As far as reliability, a longer stroke motor will always wear out a little faster vs a shorter stroke motor if used at the same RPM's.

Roul Rosenow

alright im changing all wear and tear parts on that engine ...having a bit of trouble finding new oem pistons.

you see ill be driving the car on weekends and when there is sun all the other time it´ll be sitting in the garage. im not going to be racing it every all so often im gonna give some but thats it

i just want to do the job right and getting as much information out of every forum as possible

this comming weekend i will be disassembling my h23 for internals

and giving away crank for fine balancing

ive already removed the squirters out of the h22 and thinking about getting an elimination kit as well

have you any knowledge on that

HiProfile

The OEM H23A vtec motor doesn't have oil squirters either. I've seen built H22's last a few hundred miles because of human error, and I've seen motors built from (rusty) spare parts that would take a beating and ask for more. In other words the parts combination won't be an issue if it's built right.

Roul Rosenow

see im trying to use as much original parts as possible except where i think aftermarket parts are more reliable ..

as for now im hoping things go well an i´ll keep you updated


do you know if i need to adjust any timing or mapping on ecu after i changed the crank

many regards

JRCivic1

Be careful... an H22A piston attached to a H23 rod and crankshaft sticks up out of the top of the block a couple thousandths. This can lead to engine damage: valve to piston contact as well as piston to head contact is likely unless you use a thicker head gasket (which offsets any gains in compression that the H22 piston creates over the H23A piston).

bluehbcivic

yeah i did that and the piston went out of the hold 0.030" i had to use a 0.052" headgasket and i was **** with p2v clearances

Roul Rosenow

as far as i´ve read from several members i should be fine !
ive read my share on this topic thats how i came to this idea
please correct me or the written knowledge of his topic

http://www.importatlanta.com/forums/...ild-beast.html