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just wondering - vtec head swap

 
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Old 02-05-2009, 02:05 PM
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just wondering - vtec head swap

can anyone lend me 5 bucks.....

lol just kidding anyways would a vtec head fit on my h23 block some guy told me it would but im not sure besides all the wiring id have to do any thoughts .......
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Old 02-05-2009, 02:33 PM
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Re: just wondering

yes the h22 head fits on the h23 block. But to assemble an h23vtec you need stuff off the h22, you need an h22 water pump, h22 water pipe, h22 timing belt...
I'd keep the h23 manual timing tensioner on the motor. You need an h22 head gasket, and there is a plug in the top of the block that needs to be removed.
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Old 02-05-2009, 08:11 PM
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Re: just wondering

intresting ive been thinking about going vtec also. but didnt know it would work with my h23 now i know.
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Old 02-05-2009, 09:20 PM
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Re: just wondering

Doing the h23 vtec swap is almost easier i heard. That is what i might do but not sure yet.
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Old 02-05-2009, 09:40 PM
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Re: just wondering

For the love of God people, research. I'm sick of seeing the same threads multiple times a week. This has been covered so many times before it's not even funny.
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Old 02-05-2009, 10:20 PM
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Re: just wondering

I think it was a good question to ask again.
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Old 02-05-2009, 11:35 PM
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Re: just wondering

look here
http://www.honda-tech.com/showthread.php?t=510617
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Old 02-06-2009, 01:35 AM
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Re: just wondering

I also think it was a good question. what is this site for if not to ask these questions again and again why not. I just learned somthing form this thread that i never even heard of before now. I undstand that you guys with thousand's of post have seen all the basic but why would you want to be ass holes your to fellow luder's because they have questions that you've seen before, so what, i thought that's what this site was about fellow luder's.
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Old 02-06-2009, 02:42 AM
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Re: just wondering

You're correct, it's about helping fellow Prelude enthusiasts out. However, when you dole out the same advice/information over and over and over again, it can get a little frustrating. The info is there guys, you just have to look for it. There's a reason some people know SO much about Preludes...it's because they research it and learn it. They don't get it spoon-fed to them by people on a forum.

I'm not trying to come off as a dick, however, a little researching first never hurt either.
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Old 02-06-2009, 04:07 AM
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Re: just wondering

1st, make better thread titles. I fixed it for the thread starter.

Quote:
Originally Posted by hojemwod View Post
Thank you Gary, excellent link

Quote:
Originally Posted by steve_o View Post
Doing the h23 vtec swap is almost easier i heard. That is what i might do but not sure yet.
You heard wrong.
It's easier to swap entire motors instead of just heads which needs work to make fit, headgasket concern, oiling issues for the block etc etc.


Quote:
Originally Posted by PR4NDEFF View Post
I also think it was a good question. what is this site for if not to ask these questions again and again why not. I just learned somthing form this thread that i never even heard of before now. I undstand that you guys with thousand's of post have seen all the basic but why would you want to be ass holes your to fellow luder's because they have questions that you've seen before, so what, i thought that's what this site was about fellow luder's.
Having multiple threads on the same topic floods the forum and makes navigating the site very difficult. It's nothing personal against you but im here for the greater good of the forum.

I'm leaving this thread open so let's continue. Please read the thread on Honda-tech, then, post your questions and discussions about the head swap.


Quote:
Originally Posted by dbd6604 View Post
You're correct, it's about helping fellow Prelude enthusiasts out. However, when you dole out the same advice/information over and over and over again, it can get a little frustrating. The info is there guys, you just have to look for it. There's a reason some people know SO much about Preludes...it's because they research it and learn it. They don't get it spoon-fed to them by people on a forum.

I'm not trying to come off as a dick, however, a little researching first never hurt either.
I'm Prelude13 and i endorse this above post.
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Old 02-06-2009, 09:32 AM
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Re: just wondering - vtec head swap

I understand what your sayin to, alot of times it helps to talk about things that you plain to do, it's like bein talked to not talked at. im not tryin to be an ass ether.
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Old 02-06-2009, 11:34 AM
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Re: just wondering - vtec head swap

well im sry i posted a multiple thread i sorta searched online first on a couple of sites n sstuff but they all had diffrent info so thats y i posted on here but ill try to do more researching b4 posting another thread .....neways i did get alot of help from this one thread i think im gonna start gathering everything next week.......
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Old 02-06-2009, 01:16 PM
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Re: just wondering - vtec head swap

what about that h23 crankshaft. can it handle the extra rpm's that the vtec head will be producing?:crazy:
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Old 02-06-2009, 01:58 PM
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Re: just wondering - vtec head swap

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Originally Posted by eludeauthority View Post
what about that h23 crankshaft. can it handle the extra rpm's that the vtec head will be producing?:crazy:
with balancing and work that only a qualified machinist can do....YES
98vtec spins like 8k on his h23vtec.

I spun a bearing at 6700-6800 RPMs on my stock h23 like 2 months after getting my prelude.
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Old 02-06-2009, 03:07 PM
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Re: just wondering - vtec head swap

dont mean to thread jack but this is just my 2 cents but sometimes i have a problem with finding threads about stuff. i myself have posted some stuff that had been started before simply because i couldnt find it.
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Old 02-06-2009, 06:10 PM
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Re: just wondering - vtec head swap

Quote:
Originally Posted by ShoofIsLudin View Post
with balancing and work that only a qualified machinist can do....YES
98vtec spins like 8k on his h23vtec.

I spun a bearing at 6700-6800 RPMs on my stock h23 like 2 months after getting my prelude.
how about fitting a H22 crank in a H23 block?
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Old 02-06-2009, 08:18 PM
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Re: just wondering - vtec head swap

Why would you want to do that?
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Old 02-06-2009, 08:38 PM
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Re: just wondering - vtec head swap

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Originally Posted by dbd6604 View Post
Why would you want to do that?
the H23 crank can't handle the higher rpm's supposedly. :crazy:
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Old 02-06-2009, 08:46 PM
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Re: just wondering - vtec head swap

Putting an H22 crank in an H23 block would just de-stroke it I think... Kinda pointless.
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Old 02-06-2009, 10:40 PM
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Re: just wondering - vtec head swap

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Originally Posted by dbd6604 View Post
Putting an H22 crank in an H23 block would just de-stroke it I think... Kinda pointless.
didn't think about that, guess i'll just have to balance the H23 crank or do an engine swap, F20B?
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Old 02-06-2009, 11:41 PM
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Re: just wondering - vtec head swap

there is a slight difference in cranks but i know there is a difference in wrist pin location on the pistons from the h23 to h22, jdm h22 piston and type s piston. the bores ofr the most part are the same. but you must also pay attention to A and B block pistons...honda tech has alot of better info on that but it is used for to compensate for casting differences in the blocks

and yes i have been resarching the h23vtec build for a while now. and i will be using h22 pistons, maybe the jdm h22 pistons if i can find them.

heres a good crank thread

http://www.honda-tech.com/showthread...=h23+crank+h22
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Old 02-07-2009, 12:51 AM
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Re: just wondering - vtec head swap

Quote:
Originally Posted by 94ludeguy View Post
there is a slight difference in cranks but i know there is a difference in wrist pin location on the pistons from the h23 to h22, jdm h22 piston and type s piston. the bores ofr the most part are the same. but you must also pay attention to A and B block pistons...honda tech has alot of better info on that but it is used for to compensate for casting differences in the blocks

and yes i have been resarching the h23vtec build for a while now. and i will be using h22 pistons, maybe the jdm h22 pistons if i can find them.

heres a good crank thread

http://www.honda-tech.com/showthread...=h23+crank+h22
just the info i was looking for. seems like building the H23 was done by many others, still would like to build with the non-vtec head with crower stage2's. balancing the stock crank looks like a must too, so this is definitely a future build. sorry for stealing your thread Tyco Si:tape2:
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Old 02-07-2009, 06:26 PM
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Re: just wondering - vtec head swap

Quote:
jdm h22 pistons
94LG, why wouldn't you just use Type S pistons for the extra compression? They aren't that hard to find, I know a few sets have sold on H-T or PP over the last month for ~$350.
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Old 02-07-2009, 06:48 PM
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Re: just wondering - vtec head swap

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Originally Posted by dbd6604 View Post
94LG, why wouldn't you just use Type S pistons for the extra compression? They aren't that hard to find, I know a few sets have sold on H-T or PP over the last month for ~$350.
he probably does not need that much compression and not to mention that compression requires complete and thorough engine tuning. ~12:1 compression with the h23/f22 crank and h23/f22 rods. Throw some h22 rods in there and you are close to 13:1.

There is a lot of misinformation regarding the h23vtec. People complain about the rod/stroke ratio being too low and that it cant rev as high. Well to a point these people are correct but how high is too high? who can determine that other than people who say **** it and do it anyway? If the h23 supposedly "cant handle the RPM" then what do you think of the people running f23 cranks which have an even longer stroke and a smaller rod/stroke ratio? These things can only be accomplished if you think about what you are doing and have a good machine shop to get it done for you.

and just some fyi:

the h23 and h22 blocks are the same exact castings other than the 98+ blocks which just have bigger main crank journal bores and obviously the difference in open and closed decks. Other than that, everything is exactly the same.
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Old 02-07-2009, 06:56 PM
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Re: just wondering - vtec head swap

Thanks Blake, I didn't know about the journal bores on the 98+ blocks, I thought it was just the open/closed decks that was different.
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Old 02-07-2009, 08:20 PM
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Re: just wondering - vtec head swap

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Originally Posted by 98vtec View Post
he probably does not need that much compression and not to mention that compression requires complete and thorough engine tuning. ~12:1 compression with the h23/f22 crank and h23/f22 rods. Throw some h22 rods in there and you are close to 13:1.
you guessed right sir... i dont want 12:1 plus CR cuz i want to keep it somewhat reliable and easy to tune
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