Hellbert

ok...i ran a compression test today...i have 263 265 263 262...whats going on here...im only supposed to have somewhere around 180 what the hell?

NIGn0g

Are you doing it right? I remember a post on hmt that was that high, I think the guy didnt open TB. But I really dont know, never did a compression test before...

Hellbert

dont open the throttle body and its usually slightly lower because it cant pull in quite as much air. but yes sir thats at approx. 250 rpm and the throttle body wide open with all 4 plugs out and i know the gauge is right because i went out to my lst crx just to check it and had 190 ish on all 4 im confoosered

miss-piggy

Sounds like it has some pretty high compression pistons. My guess would be around 12.5:1 as that is a pretty typical number for people to use. Unless you plan on running E85, turbo charging that engine sounds like a bad idea. You are better off selling the engine to someone for a decent chunk of change and buy something else.

Hellbert

well untill here recently there wasnt anyone that had pistons for the FRM sleeves (mahle) correct? so that means this thing must be sleeved unless its just been decked all to hell? which i think the chances of that are slim to none? just out of curiosity how would this thing react to boost? i know thats uber high but what about like 8 pounds? i wish i had a bore scope... sounds to me that someone sleeved it. i may pull the pan off of it and see if it has aftermarket rods. i really want to know what went on inside this thing...

igotnothin

if its rocking a 12.5: to 1 it will respond to boost like a crack head to crack....

It will run like a ------- raped ape, however will probably die as quickly as a crack head who is HIV + due to being raped by an ape


But you will lay some great #s if you boost that motor, but if you don't have a GREAT tuner it wont last past tunning

miss-piggy

Mahle has had pistons for H22's for at least a couple of years now. I honestly know very little about H22's and the parts you can use on them so I can't really comment on how it got such high compression, but it is clear that it is well above stock. The best way to find out is take off the pan and head.

As for how it will hold up with boost, well, it will be very efficient(high hp/psi) but very volatile. Probably after 4psi you will be moving away from finding MBT because you are octane limited. 8-10psi you will definitely be octane limited and most likely on the brink of detonation even with a good tune. With E85, I wouldn't hesitate for a second running plenty of boost. I would start getting fearful once you got over 500whp but most likely wouldn't show any real concern until you were near 600whp.

juce

First and foremost you wont get compression results that high with any stock honda piston and cam combo unless you've fucked with the cam timing and dialed out absolutely all the overlap.Even then thats high. The high spec on a 10.2 gsr motor is 235psi, so you have at least that high compression, most likely much more unless that motor is fresh as a **** and you got extremely lucky. Dynamic compression (which is what you are measuring) is a function of cam duration and overlap, and static compression ratio.

Hellbert

welp i got to lookin around a little more today and it seems i do have somewhere around 12.5:1 or so. does anyone know of any good tuners NC im willing to drive some into VA and SC but not too far. i know of a bunch of people that tune cars but i dont trust any of them or myself to do THIS car. ive done a few street tunes on buddies cars as well as my own but for this much HP i dont want to... im going to look more into the E85 aka how to make it myself i assume its about the same as making corn wisky? if it is it wont be much of a problem ive made my fair share of that haha if yall have any good sites or anything to look at about it let me know.

bigwig thats what im running into myself...i dont know much about H22s this is the first one ive ever messed with actually probably even seen of with anything done so i reckon this will be a learning expirence for a few people. but thanks for yalls help and ill keep yall up dated on whats happenin with em. ill try to get some pics posted up of the truck the crx and the civic soon. thanks again

igotnothin

you should go to chirs (xenocron) he'll take care of ya... its only 6hr dirve to MD, and from MD only 4hrs to Xenocron.

10 hr drive aint ---- when it comes to getting a good tune :1