slappin a f23 crank into a h22a4 block.
is there ant custom fab needs to be done in order to make it work properly?

h23 crank isnt much diff from a f23 crank besides f23 is 97mm and the h23 crank is 95mm

does the extra 2mm worth it?


Modified by h22_SOL at 11:38 AM 9/10/2007

 

whats an h22z4 block??

if that block has the 55mm mains the crank will work fine, just make sure to use the f23 rods (h22 rods wont even fit the crank and are much too long) and you will need a piston with a 1.181 compression height, h22 pistons are 1.220

 

offset grind and b rods FTW

 

jdogg
what pistons will work?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM JEFFREY &raquo;</TD></TR><TR><TD CLASS="quote">jdogg
what pistons will work?</TD></TR></TABLE>


f23 stuff requires a 1.181 compression height and a standard wrist pin

oe f20c stuff has 1.171 compression height and a bigger pin

rsx stuff has a 86mm bore

TSX k24 pistons should fit now that i think about it, they have 1.181 compression height and 87mm bore..

im not sure how much compression you'd end up with if you used tsx stuff..

tsx pistons are flat top, so you would end up with about 10:1 compression.. if you deck the block so the pistons are even with the deck then you will have about 10.6:1

 

be careful which block you use from a lude only 98 and up blocks will work with the f23 crank and the 2mm is worth it you will sacrifice rs ratio from 1.58 to about 1.45 as well as piston speeds increase you can still spin the crank to 7400 i personally wouldnt go higher than stock h22a redline(7200) with that crank the journals need customization there are lots of options here man...research and pick and choose whats best with reliability and budget

p.s. id recommend searching because h-t'ers will start to become annoyed...lol this crank option has been discussed here several times from what ive seen...

 

bah, R/S doesnt mean much IMO.

look at all the people spinning the h23vtec's to 9k without problems.

 

srry bout the miss spelling.. change it.

i meant to say h22a4

 

same goes for the f23 crank too..

 

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


f23 stuff requires a 1.181 compression height and a standard wrist pin

oe f20c stuff has 1.171 compression height and a bigger pin

rsx stuff has a 86mm bore

TSX k24 pistons should fit now that i think about it, they have 1.181 compression height and 87mm bore..

im not sure how much compression you'd end up with if you used tsx stuff..

tsx pistons are flat top, so you would end up with about 10:1 compression.. if you deck the block so the pistons are even with the deck then you will have about 10.6:1</TD></TR></TABLE>

well i was reain six singma thread bout their build and it got me intrested in it.
but they diddnt specify bout the f23 crank into a h22a4 block.
so i made a thread on it.


thanks for the input.

 

the f23 rod journal is the same as k-series rod journal... so no mods needed there

the rod design is also very slimilar to k-series stuff.. so again its not an issue.

 

sure it will spin to 9000 rpm i will not argue that...but for how long?? i mean lets assume main and rod bearing clearances are at perfect spec cylinders were honed to the nearest .0001", cylinder taper top to bottom was .001" a poor rs ratio will put more load on the cylinders and bearings proven hands down...no matter who spins what to 9000 rpm...look at pocket rockets h27 as a stroked example he had to build a deck plate to restore the rs ratio back to 1.58...honda factory redlines never lie they are what they are for a certain reason

but i know in the end this means **** to many on here so im gonna zip it...lol

 

This rs ratio crap needs to stop. Go talk to ssr about their h2b eg with the f23 crank and rods. Like 50+ dynos smashing the **** out of it all day. Like close to 9 grand with no balanced bottom end or shot peening. If people are so worried about it balance the bottom end. If that still doesnt make you feel at ease then get after market rods and pistons and bullet proof the bottom end.

 

there are lots of motors with worse r/s ratios, it dosnt really matter

the only pistons you can use are tsx so the compression is gona be low so it wont be able to use a big cam so you wont be able to turn it that high anyway

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lubo_25 &raquo;</TD></TR><TR><TD CLASS="quote">sure it will spin to 9000 rpm i will not argue that...but for how long?? i mean lets assume main and rod bearing clearances are at perfect spec cylinders were honed to the nearest .0001", cylinder taper top to bottom was .001" a poor rs ratio will put more load on the cylinders and bearings proven hands down...no matter who spins what to 9000 rpm...look at pocket rockets h27 as a stroked example he had to build a deck plate to restore the rs ratio back to 1.58...honda factory redlines never lie they are what they are for a certain reason

but i know in the end this means **** to many on here so im gonna zip it...lol</TD></TR></TABLE>

AllMotorRandy has been running his that high for over 2 years.

 

and how often is it driven?? is it a dd or racer??

 

thanks you guys for your input


finally got what i wanted to noe
lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">there are lots of motors with worse r/s ratios, it dosnt really matter

the only pistons you can use are tsx so the compression is gona be low so it wont be able to use a big cam so you wont be able to turn it that high anyway</TD></TR></TABLE>

why not grind the journals down, use B series rods at a custom size to fit some sort of h22 piston that will give a good CR?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">

why not grind the journals down, use B series rods at a custom size to fit some sort of h22 piston that will give a good CR?</TD></TR></TABLE>

the rods have a 1.890 big end, same as k20a3, d and b-series
the big end is 0.780 wide like k-series
they are 5.551 inches long, which is longer than any b-series rod.. there isnt even a odd length shelf eagle rod that would work better w/that crank.

so... IMHO custom piston and stock dimention f23 stuff would be the way to go.