How many Hp can u be looking at with per. pistons

[theone]

just want to kno around how much Hp can i be looking at with perfromance pistons/rods
thanks

[Kabuki]

It will totally depend on how they are configured. The total mass of the piston and rod affects HP, as does the compression ratio. The SOHC F20A engine has comparable top end power, with a smaller stroke, by using Higher compression pistons than the F22A1. If you are totally going to work over the engine block, you may want to look at the 87mm H22/23 Pistons. You get more compression, more displacement, and you can usually find them pretty cheap on eBay. The amount of money I paid the Machine shop to bore out the cylinders in my block, and the cost of the pistons, rings, Bearings, and gaskets was less than buying a set of High compression Pistons from Wiseco.

[theone]

ok, i have a f22a6
what can i expect with a higher compression pistons?

as for the h series pistons, would i have to get the cylinders bored or are they direct fit?

and about how mych did it run u to get the cylinder bored?

thanks.

just starting to do my research on the bottom end

[Kabuki]

Originally posted by theone
ok, i have a f22a6
what can i expect with a higher compression pistons?

as for the h series pistons, would i have to get the cylinders bored or are they direct fit?

and about how mych did it run u to get the cylinder bored?

thanks.

just starting to do my research on the bottom end

The F22 (and G25) cylinders are all 85mm. The H22/23 are 87mm. The F23A1 (98-02 Accords) are 86mm, but the stock pistons aren't much higher compression than the f22A1. 8.8:1 versus 9.4:1 (Can't remember exactly). I had to have the stock sleeves milled out and new ones pressed in BEFORE they could bore and hone. If you're looking for more displacement and only slightly higher compression (as opposed to the H22's 10:1), you could try the pistons from a 2.7L Legend V6. Only 4 of them, of course...

[theone]

ok, thanks for the help

so i could get all 4 cylinders bored so 87mm pistons (h22/h23)
could fit if i planned to go that route?

[theone]

i got this from Golden Eagle
its a little piece of email they sent me:
__________________________________________________
To get your F22 block sleeved up to 89 mm will run you $950.
To get your F22 block sleeved up to 91 mm ( for all-motor ONLY ) will
run you $1050.
This includes putting our new "HD" series sleeves into your block, cleaning
and decking - Two Options: If nothing is specified about the deck when we
receive the block, it will be decked to our standards with no o-ring.
1. step deck which is usually for block that do not have enough room for
an o-ring due to large bores. It is our "STANDARD"
2. O-ring - which we like to put on all motors if possible. Works great
on turbo or NOS cars. ( $50 additional charge )


_________________________________________________

so what are they exactly saying?
is he saying that the cylinder can be bored to 89mm, if so i would have to get pistons to fit this right?
(which i kno they provide, he stated that i can get new everything with this package for 1500bux) but i just want to make sure i kno whats going on.
Thanks

[93accordEX]

right those prices are just for the block work/sleeves. then you still need the pistons, rods, etc.

as for hp, a very general rule is like 10hp per point of compression. keep in mind very general, and of course depends on what else you have done to the engine. but lets say you go from 8.8 to 10:1 then thats around 12 hp.

[Kabuki]

Originally posted by 93accordEX
right those prices are just for the block work/sleeves. then you still need the pistons, rods, etc.

as for hp, a very general rule is like 10hp per point of compression. keep in mind very general, and of course depends on what else you have done to the engine. but lets say you go from 8.8 to 10:1 then thats around 12 hp.

Hmm... Anything with displacement like that?

And my whole idea of going with stock Honda sizes was to minimize cost. Most machine shops can do the same work I had done for a couple hundred. It shouldn't matter much what the actual SIZE of the bore is, since it's all the same work. The cost of the sleeves themselves may differ, but not by that much.

[ZigenBallZ]

I can't remember the exact service limit but the stock cyl sleeves can only be bored over something like .050 before you would have to worry about things...
but if you are going to bore over the stock 85-85.5mm you really have to start seriously thinking about sleeving.

I don't think there are any REAL numbers floating around for upping comp ratio's on F's... you can;t really go by what people see with H22's...but it's the closest in displacement and flow...the F22A heads don't flow as badly as some would have you believe. And the general rule about gaining power by upping the cr is that it is not a linear increase... Meaning that for every point you increase you will not see the same gains...ie: 8.8:1 to 10:1 might get you 12-15hp but going from 10:1 to 11:1 will get you slightly less... the higher the ratio the less power you gain from it... At least that's what people running crazy high (13.5:1-14:1) setups have noted...

Like I said the F22A series has little to no info about it when built up... Some principles from building other motors can and do apply but the F will surprise you in certain areas...trust me...

Kabuki: So you are running a sleeved F22A/B sohc block/head with OEM 87mm H22 pistons? I'm curious to know about the pin height placement issues you had...and what measures you took to deal with them...

[theone]

Originally posted by 93accordEX
right those prices are just for the block work/sleeves. then you still need the pistons, rods, etc.

as for hp, a very general rule is like 10hp per point of compression. keep in mind very general, and of course depends on what else you have done to the engine. but lets say you go from 8.8 to 10:1 then thats around 12 hp.

yeah he also stated (not in the copy i showed u all)
that they will add pistons and rods and the rest of the stuf for 1500something

[Kabuki]

Originally posted by NoScreenName

Kabuki: So you are running a sleeved F22A/B sohc block/head with OEM 87mm H22 pistons? I'm curious to know about the pin height placement issues you had...and what measures you took to deal with them...

No issues here... It's an F22B1 engine, with the stock rods. The old sleeves were milled out and new ones pressed in. The wrist pins are the same size. I'm not sure what issues you are referring to. I must admit though that the head work is not yet done, so the top end has not been fully assembled.

[ZigenBallZ]

Originally posted by Kabuki
No issues here... It's an F22B1 engine, with the stock rods. The old sleeves were milled out and new ones pressed in. The wrist pins are the same size. I'm not sure what issues you are referring to. I must admit though that the head work is not yet done, so the top end has not been fully assembled.

Well the way I understand it is that the H22 piston pin placement is slightly higher on the actual piston than the F22 due to the H22 rod length being slightly longer...

Don't quote me on that one though... I DO KNOW that the rods are slightly longer but the piston pin height placement is "the word on the boards" but I don't think I know of anyone who's actually put H22 pistons into an F22 block... you might be the first...

I'd be curious to know the installed piston to deck height with those H22 slugs... or did you mill the head & block?

[Kabuki]

Originally posted by NoScreenName
Well the way I understand it is that the H22 piston pin placement is slightly higher on the actual piston than the F22 due to the H22 rod length being slightly longer...

Don't quote me on that one though... I DO KNOW that the rods are slightly longer but the piston pin height placement is "the word on the boards" but I don't think I know of anyone who's actually put H22 pistons into an F22 block... you might be the first...

I'd be curious to know the installed piston to deck height with those H22 slugs... or did you mill the head & block?

Guess I should have measured them before I installed them in the block, huh? I had always read that the pistons were the same in the H23 and H22, and the RODS&CRANK were the same in the H23 and F22. I ASSUMED that the deck heights were the same on the F22 and H23. Hope so... But I don't see any obvious issues, like the pistons sticking out when at TDC...

I have not milled the head or the block.