i searched and i searched and i know the diffrence with the f22 an the h22 crank
and i know its better to have the f22 crank to get a longer stroke = extra hp
but what r the bad things about the f22 i still find posts about the h22 crank being better but no info as to why. so can i just get a verdict about the idea puting it into the h22 block for an N/A setup. the goods the bads and the ugly


PS: which f22 crank is better to put in. f22a , b or w.e other f22 cranks there are

 

The F22 crank is the same as an H23 crank.

The H22 crank is "better" because it was designed from the factory to rev higher. By revving high, that means it is more balanced. F22/H23 cranks were not designed to rev higher, so they were not balanced as throughly as the H22.

The F22/H23 were designed to make power lower in the RPM band. The H22 is the opposite. It's designed to make power over 5200 rpm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AndyD &raquo;</TD></TR><TR><TD CLASS="quote">The F22 crank is the same as an H23 crank.

The H22 crank is "better" because it was designed from the factory to rev higher. By revving high, that means it is more balanced. F22/H23 cranks were not designed to rev higher, so they were not balanced as throughly as the H22.</TD></TR></TABLE>

doesn't get any more simple than that

the only other thing i want to add is that with the longer stroke the rod/stroke ratio goes down because you need to reach the same deck height, so you increase rod stress and side loading on the pistons.. the higher you rev it the more stress

 

good info thats so too many bad things about the f22 crank eh so i guess its not a good idea to swap them

 

so sticking with the h22 crank ??

PS: what does knife edged means

 

I don't think you should worry about knife-edging the crank. I have heard of more issues with it than not.

If you are looking for stroke, I would look at getting an H23 crank balance at a machine shop or getting your H22 crank offset grinded. I don't know much about offset grinding but I have heard it is a GREAT way to get more stroke. It will require getting custom rods though. I will look into it further if I decide I can build another all motor H22.

 

Get some custom pistons w/higher pin height so you can run a longer rod/ ( longer than the h22'a's 142.?.... There are a few old threads on here about that stuff.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AndyD &raquo;</TD></TR><TR><TD CLASS="quote">I don't think you should worry about knife-edging the crank. I have heard of more issues with it than not.

If you are looking for stroke, I would look at getting an H23 crank balance at a machine shop or getting your H22 crank offset grinded. I don't know much about offset grinding but I have heard it is a GREAT way to get more stroke. It will require getting custom rods though. I will look into it further if I decide I can build another all motor H22.</TD></TR></TABLE>

h23 crank=f22 crank

but doing the offset grind i agree is a better choice.

 

knife edge is stupid for a honda, our cranks don't ride in the oil, the best thing you can do is take any rough or sharp edges off of the crank so oil doesn't stick to it as much.

if you ofset grind then you end up having to run a smaller rod journal, im not a huge fan of that idea, i like having more oil cushion area.. but most of the time you would ofset grind down to a b series rod journal size..

but i would think having the rotating assembly of an h23/f22 balanced would be cheaper that ofset grinding and the possiblity of custom rods and pistons.