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H23, 13:1 Compression?

 
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  #31 (permalink)  
Old 10-09-2006, 10:35 PM
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Old 01-15-2007, 12:52 AM
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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.
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Old 01-15-2007, 05:14 AM
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Originally Posted by MidnightRayne View Post
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.

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Old 01-15-2007, 06:31 PM
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Originally Posted by 98vtec View Post
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?
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Old 01-15-2007, 11:36 PM
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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.
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  #36 (permalink)  
Old 01-16-2007, 12:49 AM
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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.
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Old 01-16-2007, 04:07 PM
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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
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Old 01-16-2007, 04:19 PM
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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.
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Old 01-17-2007, 01:47 PM
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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!
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Old 02-10-2007, 02:50 PM
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If you really want to figure this compression ratio out go here:

http://www.zealautowerks.com/

HAVE FUN!!
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Old 01-26-2014, 02:31 PM
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Re: H23, 13:1 Compression?

Hey guys, I know this thread is back from 06, but I'm doing a G23 in a 94 SI build and I'm having issues with the AFR. I am wondering if I can just use a wideband sensor and street tune it? I'm pulling about 200hp at the crank. Trying to get around 250 maybe 300 ponies?
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Old 01-26-2014, 03:05 PM
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Re: H23, 13:1 Compression?

Ugh....
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Old 01-26-2014, 03:16 PM
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Re: H23, 13:1 Compression?

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Originally Posted by Prelud3g23ls14 View Post
Hey guys, I know this thread is back from 06, but I'm doing a G23 in a 94 SI build and I'm having issues with the AFR. I am wondering if I can just use a wideband sensor and street tune it? I'm pulling about 200hp at the crank. Trying to get around 250 maybe 300 ponies?

In assumption you're just dropping a hybrid motor and calling it a day-

You won't get an extra 50-100hp out of a street tune on that N/A motor using pump gas.


Seeing how this is from 06' - there are numerous threads to read in regards to building a good N/A motor. With a good tune, change in fuel and boltons - you could maybe reach 250hp. But that's hp, not whp. Don't know the difference? keep reading...
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