H23, 13:1 Compression?

[dakilla4ever]

I found some pistons for my H23 that will bump me up to 13:1 compression for an all motor build. Will this work? Is it still daily driveable? What other parts will i need? What octane will i have to run? Anything else you can think of plz mention.

[Si Speed]

That's way too high for DD man. I honestly wouldn't push it any further than 11.5:1.

[dakilla4ever]

What company makes pistons for the h23 besides je and wiseco?

[Si Speed]

KMS makes them.

[dakilla4ever]

i was researching last night and found out the stroke my h23 is longer than a 22. So if i just raised the compression up to 11:1 or 11.5, i should still achieve the 220 horsepower that the 22 produces right?

[Attaus]

Not necessarily. The H22 has a more aggressive cam and will probably make more power.

I don't think you will make up 35 whp by bumping the compression 2 points.

If you bumped it, camed it, threw in a Supertech valvetrain, and tuned it, you can give an H22 a run for it's money.


But... I thought you wanted boost?

[dakilla4ever]

Not sure on what i want. I'm looking for really educated opinions from people who tried it or know about this stuff. cause i dont know which would be best for what i want and what my wallet says i can get. I know all motor is cheaper but it won't give me the power im lookin for. All i want is 300 to the wheels. I thought the 13:1 compression would give me that but i can't run 93 octane with that setup. **** i dont know.

[twokexlv6coupe]

Not sure on what i want. I'm looking for really educated opinions from people who tried it or know about this stuff. cause i dont know which would be best for what i want and what my wallet says i can get. I know all motor is cheaper but it won't give me the power im lookin for. All i want is 300 to the wheels. I thought the 13:1 compression would give me that but i can't run 93 octane with that setup. **** i dont know.



you have PLENTY of research yet to do if you think this is true.



check out honda-tech.com. they have a SICKKKK FI and all motor section, with PLENTY of knowledgable people that have experience with FI/AM H23's.

[THE ONE]

ok... if your looking for 300whp n/a your looking at a ~8-30 grand depending on if you can get parts really cheap. There is a guy on here that is making 250whp on his DD tune and can easily make 300whp if tuned more aggressively. I made a little over 220whp with a really aggressive head build minus building the block.

You want whats best for your wallet? Well let me start off by saying this.... if you want to go n/a and build a 13:1 compression motor? Then I have Custom made CP pistons and rods that I will let go for only $1500. The compression ratio on the pistons are 12.5:1. $1500 dollars and I didn't say anything about cams yet....

Also... at 13:1 compression you won't be able to use pump gas. 12.5:1 compression ratio is where pump gas reaches its limits.

[dakilla4ever]

whats "FI/AM"?

[twokexlv6coupe]

forced induction or all motor

[dakilla4ever]

wow. ok i feel really slow right now.

[Si Speed]

for 300 hp, just boost man. Everyone loves turbo Ludes. :D

[dakilla4ever]

aight cool preciate it.

[Attaus]

AM? You noob it's NA.

=P

[dakilla4ever]

aight chill i didn't know.

[THE ONE]

^^attus wasn't talking to you killa4ever he was referring to twokexlv6coupe...

[twokexlv6coupe]

you bastard :p


i was drunk when i wrote that, cut me some slack :sick:

[dakilla4ever]

oh ok. didn't know.

[dakilla4ever]

I came up with an idea, will h22 pistons work in my h23. I was thinking about putting JE 11.5:1 H22 pistons in my 23. I know it will drop to 11:1. Im cool with that but for an all motor setup would that work?

[THE ONE]

you can buy my custom made CP 12.5:1 compression ratio pistons and rods I'll have for sale in a few weeks. Brand new never out the bocks ;).

[dakilla4ever]

What are they made for? The 23 or the h22?

[THE ONE]

h22....

[dakilla4ever]

will they work in my h23? Cause plenty of ppl say they wont.

[THE ONE]

they won't.... you'll need a h22 for them to work. not to mention get the block sleeved...

[ogsmakdade]

[QUOTE=TopEndLude]ok... if your looking for 300whp n/a your looking at a ~8-30 grand depending on if you can get parts really cheap. There is a guy on here that is making 250whp on his DD tune and can easily make 300whp if tuned more aggressively. QUOTE]
That's me! I guess I'm the N/A king now that ace is selling out :devil:

[dakilla4ever]

Wow but you have the h22. I want to stick with the h23 but put 250 to 300 to the wheels, I dont care how its done now. Whether its turbo or n/a i just want to reach that goal.

[THE ONE]

dakilla... the most practical way for you to go is turbo. n/a h23 just will take too much money to make even ~200whp n/a. just way yor options and see what's best. on ia I remember you saying you want it to be daily driven. that kind of power out the 23 is not likely...




sell out? lol my heart is for ever n/a with honda. but I made a deal and I refuse to back out.

[ogsmakdade]

your deal sucks. I'm thoroughly disapointed. ugh.

[dakilla4ever]

your deal sucks. I'm thoroughly disapointed. ugh.



About what?

[ogsmakdade]

about ace going turbo

[MidnightRayne]

k let me get this straight? you want 300 whp with the h23? cool you gotta turbo and your engine will have to be fully built. there is no way you can get even close to 300whp with either the h22 or h23 na. as far as i have ever seen is a guy that makes 273 whp with his h22 and he has 50 grand in the engine and its a total race car.

about the whole 13.1 conpression ratio is way off, that def some drag car ratios way over streetable you couldnt one find the gas to run that engine much less afford it.

[98vtec]

k let me get this straight? you want 300 whp with the h23? cool you gotta turbo and your engine will have to be fully built. there is no way you can get even close to 300whp with either the h22 or h23 na. as far as i have ever seen is a guy that makes 273 whp with his h22 and he has 50 grand in the engine and its a total race car.

about the whole 13.1 conpression ratio is way off, that def some drag car ratios way over streetable you couldnt one find the gas to run that engine much less afford it.

thats funny, there is a few people on HT running these kinda compression ratio's on pump gas. But i would say that 13:1 is getting very close to the thin red line and shouldnt be tested without the knowledge of knowing how to keep the motor from destroying itself.

You dont have to fully build the motor to reach 300whp safely on boost. Although it is suggested that you do a compression test/leakdown of the motor to see how healthy it is before throwing on all the pressures of boost on a potentially weak engine.

300whp NA h22 has already been done and a couple of them are in street cars.

RLZ Engineering
PocketRockets Racing
DH-Racing

[MidnightRayne]

thats funny, there is a few people on HT running these kinda compression ratio's on pump gas. But i would say that 13:1 is getting very close to the thin red line and shouldnt be tested without the knowledge of knowing how to keep the motor from destroying itself.

You dont have to fully build the motor to reach 300whp safely on boost. Although it is suggested that you do a compression test/leakdown of the motor to see how healthy it is before throwing on all the pressures of boost on a potentially weak engine.

300whp NA h22 has already been done and a couple of them are in street cars.

RLZ Engineering
PocketRockets Racing
DH-Racing

13.1 on pump gas? that funny i have a crx with 11.7 to 1 and on 93 it will sometimes ping, it needs 101 at least to run correctly, how on earth are ppl running 13.1 on pump gas? how are these people figuring out there compression ratios? some calcualtor? when we built the crx its compression was over 12.1 and we were told to lower it or never be able to run on street gas. also all high compression cars only last at the most 6 months to a year before things wear out and a full rebuild is due.

300whp on an na h22, what exactly is done on those cars and how much money went into them? that just seems like an alot of extra horsepower from a na motor. that means an engine making 300whp is at least making close to 350 at the crank which is 150+ over the stock engines. that sure is alot from an NA engine. im not doubting it just really wondering what is done to it, and if its the the prelude?

[98vtec]

13.1 on pump gas? that funny i have a crx with 11.7 to 1 and on 93 it will sometimes ping, it needs 101 at least to run correctly, how on earth are ppl running 13.1 on pump gas? how are these people figuring out there compression ratios? some calcualtor? when we built the crx its compression was over 12.1 and we were told to lower it or never be able to run on street gas. also all high compression cars only last at the most 6 months to a year before things wear out and a full rebuild is due.

300whp on an na h22, what exactly is done on those cars and how much money went into them? that just seems like an alot of extra horsepower from a na motor. that means an engine making 300whp is at least making close to 350 at the crank which is 150+ over the stock engines. that sure is alot from an NA engine. im not doubting it just really wondering what is done to it, and if its the the prelude?

if you are pinging with 11.7 compression then you have are having issues with your ignition timing and or cam timing. 11.7 is a VERY streetable compression ratio. I mean come on, the Type S comes with 11.7 stock. There are MANY factors in making a high compression motor be able to run on pump gas. I do not know all of the contributing factors but tuning your ignition timing has ALOT to do with it. You cannot run the kind of ignition advance on a High comp motor compared to a stock motor.

Friend of mine on HT is running 12:1 compression and making 250whp (on a dyno proven to read ~20whp lower than a local dynojet). People with these motors actually have a plan and thought process when putting a motor together. They dont just piece a motor together with what other people say is good or with parts that they found on ebay or with parts that they bought only because they were cheap. This is the problem with people today. many people just buy parts for the sake of buying parts and have no clue what effects are going to occur or the point of buying a certain part.

DH-Racing racing has got one hell of a setup.
http://honda-tech.com/zerothread?id=1844766

PocketRockets also built a motor that made 315hp on an engine dyno. its a 2.7L motor with over 100mm of stroke and bore size of 90mm IIRC. This is not a typical motor, he went through great custom work in order to make the motor accept 100mm of stroke without having to add a deck plate. He uses a process called offset boring which i honestly to this day dont understand the process of it.

the length that a high compression motor lasts depends on who builds it. Tbone on HT put like 50k miles on his motor which also had ITB's (high compression b series Vtec). Just because it is high compression does not mean that it will not last. Theres small things like bearing clearances, type of bearings used, piston to wall clearance....etc. Any joe schmoe can put a motor together. The key is having to tools and knowhow to check the clearances and tolerances of the motor being built and knowing what clearances to use. U could have all the tools in the world but if you dont know how to use them, you'll never be successful.

[MidnightRayne]

i totally agree, and the money time and information that would go into these cars most people wouldnt be able to have a car like that.

[absntmnd69]

with an n/a setup...h23 is no where near worth the time, money, or trouble to even make 200 whp. ive been researching this **** for a while. now if u want a cheaper daily driver build then go turbo. stock internals of an h23 can safely hold 8psi of boost. with a build and it being a dd i would not go anything over 16psi. you will have a hell of a time controlling the car with anything over 16psi. u wont be able to keep it on the road with street tires

[98vtec]

take an f23 block and put an h23 head on it with h22 pistons. Then add some cams and you have a motor like pirates on HT. He makes 200whp and 183 ftlbs.

hybrid motors ftw.

[runtingz]

yeah h23 making that kind of power will run a lot, doesn't even seem possible to me if your driving it daily... i say boost it especially if your trying to achieve that goal of hp... anyhoo, someone post up a link on fully built h23's though, and that h22 300whp, please...i want to see that!

[dakilla4ever]

If you really want to figure this compression ratio out go here:

http://www.zealautowerks.com/

HAVE FUN!!