what are some options for stock honda pistons that i can swap over for just a little highr compression? also does the h23 cranck have a higher lift than f22a and will it swap over?
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h23 and f22 crank are one in the same. wesico can custom made a set of slugs for your f22 for around $500.(last i checked)
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Supposedly you can get a set of RSX-S pistons and bore your F22 block out 1mm. The pistons are the same compression height they just have a larger bore by 1mm. If not that then you'll have to go forged aftermarket pistons and spend a lot of money.My Members' Ride Thread - It's a marathon build, not a sprint. But keep me honest on the update frequency!Comment
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f22 and k20 pistons are not the same compression height. They're kinda similar. 1.203 for the f22 vs 1.181 for the k20.
Define a little more compression. A little can be a couple 1/10th of a point to an extra point or 2 of compression. What bore do you want?Comment
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just 1mm over or so not to big but i do want bigger than stockComment
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I feel like an idiot. I got the F22 and F23 pistons confused. The F23 and the K20 have the same compression height pistons.
On topic, I kind of had this as an idea a while back and Wed3k is currently going to attempt this but this would be a risky build due to clearances, also make sure it's not your only engine. This setup would NEED to be clayed by a machine shop to double-check clearances. Also, tuning this setup is also required as it would put your compression ratio much higher.
Check out this thread. http://cb7tuner.com/vbb/showthread.p...2&page=1&pp=20My Members' Ride Thread - It's a marathon build, not a sprint. But keep me honest on the update frequency!Comment
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It needs to be clayed, but why take it to a machine shop to do that?H.S.A.E.
90 CRX Si - gutted, caged, Bisi F2d kit, close ratio LSD trans, F22A6 - under construction
99 civic LX - y8 head and trans, lowered, blowing cold AC, and getting 35mpg.Comment
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well i only want around 10:5:1 because i still wonna run on pump gas if that helps at allComment
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they do make f22 pistons with higher compression, with a little milling of the head im sure you can acheieve 10 and a half.
.050 milled is already 10:0 with stock pistons
-wed3k-:¦:-
Originally posted by wed3kComment
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sweet thanks for the helpComment
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Because it doesn't sound like he has any experience anyways. Which doesn't say anything bad about him but I'd just have him go to a machine shop for the moment of truth. He'll have to be there anyways for boring the block. Maybe even for fitting the pistons and rods in the block if he doesn't have or rent a ring compressor.Originally posted by hatchninjaMy Members' Ride Thread - It's a marathon build, not a sprint. But keep me honest on the update frequency!Comment
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a stock f22 block is like 85.5mm, can be honed to 86mm...
we use the Sunnen CK10 and probably a 123 grit type of stone then to 518 and then 623.
stock f22 is 85mm, max 86mm is advisable before problems occurLast edited by HondaFan81; 09-06-2007, 06:29 PM.Comment
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i was wanting to hone it but would i have to get bigger pistons? or just diffrent rings?
i was thinking lightend rods and crank deck the block to .050 for higher compression and keeping stock pistons.Comment
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Can you mill the head that much? Is there a drawback to this that i dont know about? because 9.5 or 10-1 with a 272 regrind would pretty fun until i get the cash together for a proper H22 swap.Comment
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a brand new head should have more than .050 on the wear pads.
hone = bigger pistons (then the pistons come with rings)
for stock pistons, milling that much may be okay, i have never clayed a F22 block with that amount milled off. With a dome type pistons it may not clear. also need to worry about the cam and how much lift.Comment
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