Dr.green

Can someone "that knows" please tell me how much boost a bone stock h22a can handle saftly? so many different answer everywere...
And what parts are weak? blows up first? Rods?
Thanks!

soon2b_EG

Not a matter of PSI it's a matter of hp.
300 whp is about the limit safely, before you start having problems with the ring lands.

Dr.green

okey, but how do i know when im safe without have it dyno tested? I dont have a dyno to check hp you know.. just need some advice, I just got this engie into my civic and i just have a cuople of days left until i got all my parts and im all done,
Thanks

OLD_HATCH

ringlands will probably go first if the engine is healthy.

My buddy killed his ringlands at a little under 300whp. He spiked to like 18 psi though on a t3t4 57 trim I think. The car was only tuned to 8-9 lbs using the stock honda map so when he spiked, it went kla kla kla kla kla.

Dr.green

i got exrta fuel injection trough a "Mapfueler2" I have added 2 extra injectors that i can control for each 1000rpm with that thing, so i think fuel is no concern. and reading sparkplugs m i usd to..

PrecisionH23a

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dr.green &raquo;</TD></TR><TR><TD CLASS="quote">i got exrta fuel injection trough a "Mapfueler2" I have added 2 extra injectors that i can control for each 1000rpm with that thing, so i think fuel is no concern. and reading sparkplugs m i usd to.. </TD></TR></TABLE>

You do realize that is complete crap, don't you?

QuickStyle

zero psi is the max (if you want it to last) 10psi if you dont mind replacing the engine a couple times a year.

weak ringlands and the sleeves are made of a weaker material, not cast iron.

lets face it, if you wanna run boost on a H series, you need to get it sleeved. i thought this was cover like 5 years ago.

0xenocron

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by QuickStyle &raquo;</TD></TR><TR><TD CLASS="quote">...and the sleeves are made of a weaker material, not cast iron.
</TD></TR></TABLE>

actually, the H sleeves are pretty strong...the reason you need to resleeve when using most aftermarket forged pistons is the FRM coating on the H Sleeves

Finest

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dr.green &raquo;</TD></TR><TR><TD CLASS="quote">okey, but how do i know when im safe without have it dyno tested? I dont have a dyno to check hp you know.. just need some advice, I just got this engie into my civic and i just have a cuople of days left until i got all my parts and im all done,
Thanks </TD></TR></TABLE>

First, research research research! Give us a break down of all your parts.

If you think you'll be okay with that little controller thing for your two extra injectors, you're in for a world of hurting when you go to boost it. You'll need at the minimum a reliable EMS to control larger injectors and tune properly.

How do you tune, you ask? Well, you can start off with a basemap and street tune it with a wideband O2. Then hop on a dyno and fine tune it some more. Again, this is assuming you have all the proper parts.

But to answer your original question: I wouldn't recommend anything over the wastegate spring pressure at first. The weak points in a stock H22a are the ringlands, which tend to break off from severe detonation (what wouldn't?!). Everything else being equal, I would definitely advise you to take it to a reputable shop and have them help you.

QuickStyle

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xenocron &raquo;</TD></TR><TR><TD CLASS="quote">

actually, the H sleeves are pretty strong...the reason you need to resleeve when using most aftermarket forged pistons is the FRM coating on the H Sleeves</TD></TR></TABLE>

yes i was refering to the FRM, but i thought that it was the material it was made of, did not know it was a coating. now im going to have to research some more on the sleeves.

1fastlude1

8 psi is usually safe if you have it tuned- h22 blocks are stronger than people think there solid decks not open like b series, so just keep the boost low and get her tuned youll be fine

ProjectBB6

iTrader: (1)

Lol... do you guys know the record for an JDM H22? lol it was about 530whp and lasted a over a 100 passes and a over 100 dyno pulls. The head blew after a while. Bottom end was still good. BTW it is a mater of psi AND Horsepower. LudeTechs car lasted for making 330whp @ 9psi for a year. He then took the kit off and sold the car. The engine was still healthy with perfect compression and is still driving today.

alterdcreations

is all in the TUNE

ProjectBB6

iTrader: (1)

^ that would be correct to a certain point. Its heat and pressure that is cracking the ring lands. Ludetech was running an h22a4 (open deck)

Turbo-GSR1287

iTrader: (1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrecisionH23a &raquo;</TD></TR><TR><TD CLASS="quote">

You do realize that is complete crap, don't you?</TD></TR></TABLE>

Dude he is right, im in the process of getting ready to get my GSR tuned. I am currently running that MF2 crap. And trust me that fuel setup is so hit or miss. One day it drives good, another it runs like Crap. Runs rich as ****. and there is just something about throwing gasoline right into the intake manifold i just dont feel safe with lol. Bigger injectors, fuel pump, standalone Ftw!!!