VtecDA9

Ok i searched plenty and there was nothing specific. I just want to know if having the crankcase vent hose not hooked up to the pcv valve and intake manifold is going to hurt performance... if so, how? i know that bypassing the pcv valve straight to the intake manifold makes the idle high. That can be solved by plugging the hole on the IM... that's what i have done right now. But other than smog issues in CA, am I losing anything?

spoolinlude

nope

did it to my car, no change in performance

VtecDA9

well even if there are no hp figures, are there any negative things i won't be able to notice till later down the road or something?

spoolinlude

Nope you should be ok, take a look at most race intake manifolds, they don't even have holes for pressure check! But anyway I've had mine like that for a month now, turbo john the turbo god says its fine....and it seems fine to me, so i think your ok

aeolus

Ifyour gonna use those little filters on any openings on the head/valve cover,always make sure its clean at all times.Blow by pressure buildup can ruin your rings.Thats one of the reasons its there for,to evacuate any crank case pressure.A catch can would be a better idea.

pissedoffsol

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aeolus &raquo;</TD></TR><TR><TD CLASS="quote">.A catch can would be a better idea.</TD></TR></TABLE>

right on. you can get one pretty cheap.

hell, there's a DIY one on here somewhere made out of a pickle jar!

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VtecDA9 &raquo;</TD></TR><TR><TD CLASS="quote"> are there any negative things i won't be able to notice till later down the road or something?</TD></TR></TABLE>
Yes, your oil will need to be changed more often because it will become contaminated with the fuel and exaust gasses (blowby) that are no longer being removed by the PCV system. Not to mention the increase in emmision output of your car.

spoolinlude

Good call, forgot about that one!

10K2HVN

actually, with it pluged in its suppose to hurt performance. the oil vapor that goes back in the intake manifold is suppose to lower the octane of the gas; thus, lowering performance.

spoolinlude

are u talking about the pcv valve being hooked up?...... in another post about this I am even more confused!

$pecial K

anyone got a pic of their engine with a crankcase vent filter?

VtecDA9

So there are oil vapors from the valve cover vent and the vent from the crank that hooks up to the pcv valve correct? I always thought the crankcase vent was that black box behind the block? Any how.... they both relieve pressure and recycle oil vapors I guess. Shouldn't the pressure relieve themselves anyhow if there are vents, whether they are hooked up to the intake manifold or not?

Basically, the black box behind the block and the vent on the valve cover... do they do the same thing?

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VtecDA9 &raquo;</TD></TR><TR><TD CLASS="quote">So there are oil vapors from the valve cover vent and the vent from the crank that hooks up to the pcv valve correct? I always thought the crankcase vent was that black box behind the block? Any how.... they both relieve pressure and recycle oil vapors I guess. Shouldn't the pressure relieve themselves anyhow if there are vents, whether they are hooked up to the intake manifold or not?

Basically, the black box behind the block and the vent on the valve cover... do they do the same thing?</TD></TR></TABLE>
The black box on the block is an oil seperator. The fumes go out there and into the intake manifold. The hose on the valve cover allows clean filtered air to enter the engine when the PCV valve is open.

spoolinlude

Ok, i plugged the pcv on my car and put a catch can in with the line coming off where the pcv gromet was goin to the catch can.... seems ok to me, had to readjust the idle but big deal...... i also noticed i have no blow by now, whereas before i did this i had a little bit..... not sure if this cured it, but hey its gone so i don't care!

VtecDA9

So would it be advised to have the pcv valve hooked up on a new motor to help the rings seal? or not a problem when shifting below 5000?

vaskater

I can't imagine that unhooking and bypassing your PCV valve would have any substantial positive effect on the performance of your engine. I generally try to trust the expertise of the Honda engineers. The PCV valve and crankcase vent are there for a reason! Is the performance gain (if there is any at all) from sealing it worth the potential long-term consequences for your engine?

VtecDA9

I just don't thave the pcv hoses and pcv valve at this point so i'm wondering if it's ok... basically. I got the answers, jsut need to know now if it is necessary during "break in" to help the rings seal??? The help is greatly appreciated

bOOsTiNSoHcVtEc

anyone have pics of this crankcase vent? also the valve cover hose...does it vent blow by pressure or recieve air?

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vaskater &raquo;</TD></TR><TR><TD CLASS="quote"> The PCV valve and crankcase vent are there for a reason! </TD></TR></TABLE>
The PCV system is mainly for reducing emmisions.