Ok well clutch this thread is kinda for you too bud. As well as anyone who can contribute any type of info on this subject. Since we where having good talk about this destroking bit in your other thread. I thought to just go ahead a make a thread so we both can add info along with others about what we find out.

I'm talking to a guy on another forum about destroking a f23 block with a h22a4 crank. He should have a good bit of info for us b/c he was building the same set up couple years back just never finished and then sold his honda. I'm still waiting on some answer from him as I just sent him a mess. about 30mins ago.

I have also saw a thread I have to try and find it again but I found one talking about using a f20b (88mm) crank in a f22 block. They "said" that will bring the engine to a 2.1l. So I'm thinking if that is true then f23blcok with h22 crank (90.7mm) will bring me to 2.2l?? I donno how to do the math so I have no clue I’m just guessing. BTW the f22 cranks are 95mm and the f23 cranks are 97mm

Please no useless posting...

 

Example for the K24...
87mm bore = 8.7 cm
99mm stroke = 9.9 cm
4 cylinders

pi/4 * (bore)^2 * (stroke) * (cylinders)

that comes out to 588.5 cm^3 per cylinder

2354.1 cm^3 total for 4 cylinders

That's your math lesson for the day (You're welcome.)

 

Thanx for the math lesson Jim!

I got lazy tho and found this... http://www.bgsoflex.com/displacement.html

 

ok so i have some good news if its actually news at all lol. the h22 and f22 cranks are interchangeable. im sure you need to transfer a few other parts over but they work. this would be good to decrease the stroke and bump compression up there. good to free up rotating mass and send the rpm to the roof with a proper build. ill keep searching and really figure out all the fine print about the swaps.

 

well I know if you use the h22 crank with f series pistons it leave the piston in the hole about 1mm. That will bring the c/r WAY down in the 7's...that’s way way too low. So now you are looking at custom piston to for boost...but you can use h22 pistons as another way around this but only if your going n/a and using the f23 block. B/c you have to bore to 87mm for h series pistons. That makes the cyl walls really thin so NO GO for boost only for n/a and that’s still pushing it...I have to rethink my whole set up. I was talking with piratmcfried and he is the g series masta. He has allot of good info too if you search for his builds.

 

So can you use a crank from an H23 and put it in a F22 block?

 

f22 and h23 are same exact same crank and rods

thats why ppl like to do a h23 vtec. its a stroked h22 son!!

 

So can i drop that in ether of my accords and whats the benifit?

 

none cus ALL f22 engines have the same crank. Now if you drop the f22 crank into a h22 then you gain more low end.

 

So in your eyes what would be better 2 build.... an F22 with H23 parts and other upgrades or an H23 with F22/23 parts and other upgrades?? Rite now i cant afford 2 do a newer engine swap so im tryna get more power from stock parts just different engines.