h22 or h23

[arrozburner]

im going to start working on horsepower next but i want to do it right the first time so i need some advice. im planning on swaping out my motor and going turbo with the new engine, my question is should i go with the h22 or the h23? does the vtec play a big role in boosted cars? theres a good price differance between these motors so money is a small incentive with going with the h23 but what would be best for a boosted cb7? which ones easier to boost? thanks

[blazen_accord]

H23 has lower compression and is more boost happy then the H22. You can also boost the H22 but you need new piston to lower the compression.

[phatdoughnut]

IMO, h23 baby!, even for all motor....look at 2point6 build up, he has a nice car and nice motor and all, but you know how much money he has spent on it? and he is even on his 3rd motor?,

i know there is a boosted accord running around somewhere out there that is boosted on stock internals, and is pushing what 2point6 is, but with like way more torque than he has...

just my 2 cents............

dont want to start a fight or nothing...

[arrozburner]

i plan on upgrading the internal, especially the bottom end, before i boost it. so ofcourse the stock internals are going and im replacing them with 9:1 je pistons (thats good right?) and crower rods...but im not sure about the crank. i plan to keep is as a daily driver but i also want to make it into a 12 sec car. does vtec play a big part in boosting as it does in all motor applications?

[JDMCBDriver]

I say if your going to go turbo, go H23.. better results... with a built H23

[arrozburner]

OK, now i know that i will be going for an h22a...thanks fizzbob7, your replies answered all my questions and left no doubt in my mind that the h22a is the engine for me. in fact, i was planning on getting a paint job early next year but i decided to go for the h22a instead and live the paint job off for a while. my next question is what would i need to up it to 2.44 liters and isthis a good idea for a boosted car? i want to get the most potential out of the swap but i still want to be able to drive it on a daily basis...whats the point of having a nice car if i cant drive it all the time? i have a rough idea but any help would be greatly appreciated.

[H23 VTEC]

h23 is better in the long run. Put a h22 head on it and you have vtec and bigger displacement then a h22 and just as much horsepower as the type s motor from japan. This way you can have the best of both worlds. You can boost more on stock interenals and have vtec at the same time.:D

[BustedLX]

Originally posted by H23 VTEC
h23 is better in the long run. Put a h22 head on it and you have vtec and bigger displacement then a h22 and just as much horsepower as the type s motor from japan. This way you can have the best of both worlds. You can boost more on stock interenals and have vtec at the same time.:D I don't know where you gathered your information but the USDM H23A lower end is considerably weaker then the H22A's. Not to mention that there is no way that just bolting an H22A head on an H23A lower end is going to make as much crank HP as an SiR spec H22A. The H23A lower end could never rev high enough to make the power.

Even the JDM Accord Wagon H23A DOHC Vtec engine made a little less then 200hp but had more torque. That's why the engine was developed for the Accord Wagon. And that was and engine designed with a stronger lower end, tuned, and built by the factory. So how you got that idea is beyond me. It's common knowledge that frankenstien H23 Vtec's make less power and don't last.

The only reason the H23 is a better choice for boost is because it's more idiot proof. The lower compression ratio makes for lower cylinder pressures meaning lower cylinder temeratures, So you are less likely to blow the engine with higher boost levels and incorrect tunning.

The H22A is not as forgiving as it's an NA engine almost at it's operational limit, there isn't much room for error with an H22A.

Either engine can take boost and make good power, the key is making it last. Honda B and H series engines primarely the B16A/B, B18C1/C5, and H22A/A4/A7 are designed as high output high performance NA engines. They aren't intended to be boosted and don't react well to being boosted. The cylinder heads develop hot spots as well as other issues, They're better suited as NA engines.

Sure you can boost them and run them on 5psi for ever and never have a problem but the problem is no one ever wants to stay at 5psi, they all want more power and more boost which leads to the eventual demise of the engine.