Boosting an H22A

[mrsyeltzin]

Im getting (hopefully it arrives soon) a JDM h22a for my 92 accord. I want to try to keep the compression at the stock 10.6:1 for power, and i was wondering how much i can safely boost with it. I dont really want to lower the compression because i want to keep the benefits of the high compression from that motor.

[CivicSpoon]

I'd say probably a max of 6psi if even that with stock compression. I wouldn't even try it if i were you.

[mrsyeltzin]

I knew i wouldnt get much. What hp would 6 lbs gain?

[B1SiR6A]

Aren't there flaws in the H22A when it comes to bossting it?(weak walls etc)

[SiGNAL748]

Originally Posted by B1SiR6A

Aren't there flaws in the H22A when it comes to bossting it?(weak walls etc)

yeah, i would look into forged parts and resleeving it before anything. but since its only 6psi...maybe he'll be ok?

[mrsyeltzin]

I was worried about weak pistons (didnt know about the sleeves), but if i were to get these stronger pistons and sleeves, could i boost at maybe 8-10 with the high compression. Right now its just a thought, but im trying to avoid lowering the compression. Just dont want to lose any natural motor power.

[liquidflame8]

you have thin cylinder walls. so sleeving = good idea

[strodda]

just curious, but do you have a turbo kit already or have a deal on one?? if youre still gonna be spending money, id say build it up and stay n/a. but thats just me, i prefer all motor.

[mrsyeltzin]

No deals, but i wanted too explore some options. I really like the idea of all motor, but turbo can be hard to resist...

another question for you guys....i got offered a complete nitrous kit for 500, he said i could safely do 50 shots on the h22, but im skeptical. Whats a safe limitation?

[mrsyeltzin]

strodda, you have an h22 in your accord right?

[Tranzlogic]

h22a is a kick A$$ motor for N/A applications...They have weak cylinder walls and deck. you will need to sleeve the walls and deck it before you run any boost in there otherwise within a yr your gonna be out a brand new motor. As far as getting new pistons and keeping the same compression and raising the boost...that is a huge NO NO... if you are hell bent on boosting this plant and not lowering your compression, you need to get new pistons yes and new rods as well along with the cylinder sleeves and your still gonna be limited to 6psi MAX..I think you need to learn how a turbo works and makes its power before you explore this because you would then learn that a turbo cannot operate under high compression..you will DETONATE...If you wanan boost you need to lower your compression, if you want to leave your compression then forget the turbo idea ...it boils down to physics..YOU CANT HAVE BOTH ..you need to pic one bro, turbo or compression

[mrsyeltzin]

roger that tranzlogic. your right i dont know shit about turbos. but thats why i posted this thread, to see what i can do. thanks for all the info.

[Tranzlogic]

not a problom man, after all thats what all of us are here for...Q and A and sharing matters of opinions.

[boosted331]

Originally Posted by mrsyeltzin

I was worried about weak pistons (didnt know about the sleeves), but if i were to get these stronger pistons and sleeves, could i boost at maybe 8-10 with the high compression. Right now its just a thought, but im trying to avoid lowering the compression. Just dont want to lose any natural motor power.

If you sleeve the motor and drop the compression to 8.5:1 or 9:1 you will still make more low end torque than any naturally aspirated B16 or B18 would, so why are you so stuck up on keeping 10.6:1? You may only make another 15 horsepower naturally aspirated, but going to 8.5:1 may allow you to run another 12 pounds of boost on pump gas, and making a ton more top end power. Besides, how much racing do you do before your turbo spools? First gear, then you shift, then you never fall out of boost and if you had high compression that's when you would be wishing you had low compression so you could run more boost and power.

[mrsyeltzin]

so would a turbo also increase my torque at about the same ratio it increases h.p?