vtec.dc2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thermal &raquo;</TD></TR><TR><TD CLASS="quote">A check valve is not really even necessary. PCV valves are one way also. They function as check valves.</TD></TR></TABLE>

check valve is necessary because pcv valve isn't designed for boost and will fail or leak at some point

IN VTEC

iTrader: (3)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stan D &raquo;</TD></TR><TR><TD CLASS="quote">here is Summit's evacuation system
http://store.summitracing.com/...w=sku

stan</TD></TR></TABLE>
It's probably originates as a GM check valve used for either the air pump or EGR. I've seen them on LT1 engines coming off of the exhaust manifold.

accord387

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

honda has a PCV valve...pressure control valve. </TD></TR></TABLE>

haha i know they have that, but i was refering to pumps. I just dont know anything about the new hondas so i dont know if they started to incorporate a pump or not.

HR-1320

Do you guys read what you write or what. Tony you said it would work on an 800 hp engine. All I said was no It won't when theres 40lbs of boost. Now you say atleast it will draw beter than nothing. Ok great but thats not the arguement. I see on other posts that you can't stand to be wrong so I'll just let you be.
Blue Oval557 You obviously can't read. You talk about na. Great I never said anything about that other than vac systems work great for na because they don't build much pressure. Keep using that carb chump that **** will really teach YOU alot.

Tony the Tiger

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2.0Coupe &raquo;</TD></TR><TR><TD CLASS="quote">Do you guys read what you write or what. Tony you said it would work on an 800 hp engine. All I said was no It won't when theres 40lbs of boost. Now you say atleast it will draw beter than nothing. Ok great but thats not the arguement. I see on other posts that you can't stand to be wrong so I'll just </TD></TR></TABLE>

There was an argument?

FYI:

Boost pressure has no direct relation to crankcase pressure. It is how much power that is created by the motor. I can say that an 800+ HP all motor race engine will produce just as much crankcase pressure as a boosted one, UNLESS someone is stupid enough to route a line into the crankcase and fill it with boost pressure. (like how some guys route their stock valvecover breather line from the charge pipe into the valvecover ).

It doesn't matter if you run 80psi of boost or all motor. Crankcase pressure is blowby, and it depends on how much power (energy) is being generated, of course, with the pistons and rings in good running condition. A 2000+ HP all motor engine will sure create more crankcase pressure than say an 800HP running 50+ psi of boost -- just as an example

Oh, I have never seen an exhaust PCV evac system ever fail to keep up. If the crankcase is being pressurized, it means it is time to step up to a larger hoses and perhaps route more lines to the exhaust...

HR-1320

I can't say Iknow about 2000hp motors but when I turn the boost down on my motor I don't pop the blow off. How could I explian it beter. Its the same block set at the same tolerences. You say I'm not getting anymore air in the chamber when I turn the boost up. What do you think causes the pressure inside. BTW thats not question.

ne3ek

when you turn down the boost, you turn down the compression in the chamber, you turn down the horsepower.

I'm not an expert by any means but what tony is saying kinda makes sense to me. N/a motors run super high compression to make up for the lack of compressed air. so there is still lots of crank case pressure. Thats my theory but im prolly wrong

thermal

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtec.dc2 &raquo;</TD></TR><TR><TD CLASS="quote">

check valve is necessary because pcv valve isn't designed for boost and will fail or leak at some point</TD></TR></TABLE>
I wasnt referring to the stock PCV system itself. I was talking about the additional check valve that I plan to add on the tubing......

thermal

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k4ff1n3 &raquo;</TD></TR><TR><TD CLASS="quote">thermal, when you are done, we should meet up, id love to check out your setup. </TD></TR></TABLE>
no problem man. My set-up should be done by the end of June. I'm putting mu motor in soon...

Tyson

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

honda has a PCV valve...pressure control valve. </TD></TR></TABLE>

its Positive Crankcase Ventilation valve.

menkio

lol

accord387

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2.0Coupe &raquo;</TD></TR><TR><TD CLASS="quote">I can't say Iknow about 2000hp motors but when I turn the boost down on my motor I don't pop the blow off. How could I explian it beter. Its the same block set at the same tolerences. You say I'm not getting anymore air in the chamber when I turn the boost up. What do you think causes the pressure inside. BTW thats not question. </TD></TR></TABLE>

dude you talk **** about people not reading, yet it seems you dont either. you turn DOWN the boost... that means you turn DOWN your horsepower output... tony said the more horsepower you make the more crankcase pressure you will have, therefore by turning down your horsepower is why you do not pop the "blow off". Tony's explanation holds true to everything you have said. The more air you put in there obviously the more power your going to make so i dont understand why you posted most of that.

Arsenal

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ne3ek &raquo;</TD></TR><TR><TD CLASS="quote">
I'm not an expert by any means but what tony is saying kinda makes sense to me. N/a motors run super high compression to make up for the lack of compressed air. so there is still lots of crank case pressure. Thats my theory but im prolly wrong </TD></TR></TABLE>

Understand, but then what about diesel engines which have even higher compression than that of petrol engines? They must contain excessive pressure?

Benard

most diesels run what is called a draft tube, which just lets the blowby spray onto the roadway

MajorPayne

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Benard &raquo;</TD></TR><TR><TD CLASS="quote">most diesels run what is called a draft tube, which just lets the blowby spray onto the roadway</TD></TR></TABLE>

^^^ hes right, esp the older diesels, newer ones still do this, but some have more "environmentally friendly" ways of doing it now, ill get a pic of my blowby tube on my scout tomorrow

HR-1320

So what you have said helps this thread how. So you don't like how I spoke, you sound like a bigger ******* the me.

accord387

I helped this thread by pointing out that you talking all big and bad about a 800whp car, try to prove someone wrong, but in turn you proved him right

Modified by accord387 at 10:54 PM 6/7/2005


Modified by accord387 at 11:01 PM 6/7/2005

Benard

anyone know were i can find vac hose that can withstand exhaust temperature??

all77otorhead

could you take advantage of hooking up the hoses at a bend in the header where the Bernoulli effect would create a lower pressure and suck even harder?