H22Si

bore spacing?

awesome thread

Innovation

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H22Si &raquo;</TD></TR><TR><TD CLASS="quote">bore spacing?

awesome thread </TD></TR></TABLE>

I thought about adding that but since its the same for all F/H motors I figured its best left out of the thread... I didnt think it was much of a need to know type spec...

ZigenBallz

The F22Ax & F22B1 VTEC both have 34mm Int valves & 29mm Exh valves if I remember correctly...

While the...

F22B2 has 32mm intake valves and 29mm exhaust valves...Strangeness I know...

and even though numerous sources list the F22Ax heads as having 50.5cc chambers they in reality have 50cc chambers...

and if I might be so bold as to request the addition of the F22B DOHC, the F20A DOHC and the F20A SOHC...

Add em and I'll send what info I have on em...

for the thread though.... it's about time someone made a good solid repository of this info...


Modified by ZigenBallz at 8:21 AM 5/5/2005

Innovation

Post up whatever info you have on the F20A/F22B DOHC's and ill add them

Innovation

Added F20B valve specs

machine4321

thanks fo rthe f20 specs.....i guess h23 valves would work?

Innovation

stem heights are going to be different

machine4321

thought about that after i posted..dammit lol

2lude4u

Can anyone post how compression ratios are affected by various alterations like thinner/thicker head gaskets, milling the head, etc. I know this is depends on which motor/head your dealing with, but if you can at least put the calculation method in the main post it will be helpful.
I'm sure someone has it memorized, but if not I'll have a look at my books tonight and see if I can post it.

2lude4u

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PirateMcFred &raquo;</TD></TR><TR><TD CLASS="quote">

https://honda-tech.com/zerothread?id=438456

Pirate</TD></TR></TABLE>

Thanks, very informative.

Innovation

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PirateMcFred &raquo;</TD></TR><TR><TD CLASS="quote">Hey rick, This One did a boosted F20 Build and he had his CC measured. He said in his thread it was ~54cc's so I would guess that it is 53.8cc</TD></TR></TABLE>

I have that head getting cc'd aswe speak... Ill post up results by the end ofthe week

Ill take a look at flyrod's thread in a few minutes, thanks

edit:

I will have dome volume specs for USDM H22, JDM H22, F20B and F22 pistons soon... Jdogg is taking a trip to RLZ to have magic man Brad Z cc everything

Im gonna hold off on calculations untill everything gets cc'd, giving definitive specs for the most accurate calculations...

mgags7

"with this information i will be able to build the ultimate honda block"

as he taps his fingers on the keyboard menacingly.....

wow now im sorta regretting saying all that....

anyways....good info....

prelittlelude

rick you listed the f23a1 as 1.181 compression height, could one assume this is for all f23ax?

edit:

agian rick i wanted to mention the f20c , pretty much disreguarding the head but the pistons are high compression forged frm compatable with a relatively short compression height

also the 04+ f20cs have a 90.7 stroke witch means the rods could be of some use

also the 00-03 have a 84mm stroke and the rods could be possibly used in a hybrid setup..

also the f20c pistons have a 87mm bore and they have the same pin diameter as the other motors mentioned here as well as if my memory servers me right has a usuable big end bore of the rod, meaning it is the same as atleast one fot he motors listed here i just don't remember which.

Innovation

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">rick you listed the f23a1 as 1.181 compression height, could one assume this is for all f23ax?</TD></TR></TABLE>

I would say its safe to assume so, there arent any variations in the stroke, rod length or deck height between the different F23's... It would be kind of odd if there was actually a difference in compression height ::shrugs::

prelittlelude

well just so i have a one stop shopping spot im going to put the f20c info up

99-03 86mm stroke
rod
155.65mm lenght
BE bore is 2.008
piston
1.181 compression height

04+ 90.7 mm stroke
rods probably same spec as h22a4

JDogg

according to my info the f20c has a 153mm rod and the f22c has a 150mm rod

h22 has a 143mm rod

The_Head

subscribe to thread

Innovation

Are you going to make a compression calculator for the H/F series motors?

&lt;----- willing to help out if there are any monetary requirements

Innovation

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The_Head &raquo;</TD></TR><TR><TD CLASS="quote">subscribe to thread

Innovation

Are you going to make a compression calculator for the H/F series motors?

&lt;----- willing to help out if there are any monetary requirements</TD></TR></TABLE>

If anyone wants to make one based on the information provided in this thread... Be my guest

Ill help with whatever I can to make it happen

spirit7627

Anyone know the deck height of the F20c ?
also the rod width and, if the F20/22c have the same piston compression heights?.

Next ; does anyone know the dome cc's for the F22b/F20a ( dohc & sohc ) and, F20z ? Do the all ( F20 a vs F22b) have the same piston compression height ?
That's been bugging me for 2 years. Just came back from a 4 month stay but, did not have time or resources to find that info...

Sam1am26

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innovation &raquo;</TD></TR><TR><TD CLASS="quote">
Ill cover all and everything you ever wanted to know about crank/rod mods/swaps and secrets in another informative thread similar to this one... I should have that up by the end of next week...
</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innovation &raquo;</TD></TR><TR><TD CLASS="quote">
I have a crank mod/rod swap thread in the works that will answer all your questions and then some... That will be the first of several write ups and projects I have coming up for the prelude forum...
</TD></TR></TABLE>

Whatever happened to this???

Innovation

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sam1am26 &raquo;</TD></TR><TR><TD CLASS="quote">Whatever happened to this???</TD></TR></TABLE>

https://honda-tech.com/zerothread?id=1245350
https://honda-tech.com/zerothread?id=1245658

Ive been extremely busy lately, If I had the time to do more in terms of tech articles and write ups I would... Im just spread super thin as it is.

Being a dad, being in a relationship, business ventures and projects keep me pretty tied up now adays

Innovation

F22 and H23 cranks are identical, same exact part number from Honda... Same goes for the rods

Sille98

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PirateMcFred &raquo;</TD></TR><TR><TD CLASS="quote">Hey rick, This One did a boosted F20 Build and he had his CC measured. He said in his thread it was ~54cc's so I would guess that it is 53.8cc:

https://honda-tech.com/zerothre...64205

Pirate</TD></TR></TABLE>

Ya he found out some good info. This thread should be a sticky Awesome Info...

hybrid_vtec

good info!

mgags7

back from the muerto...but yes it is good info

anyone with the missing piston specs chime in