Giuseppe

90 civic..

i've read ppl using fish tank check valves to bleed boost..
anybody have any pics on this setup, as to how many in series
p# what size, etc etc, what are the total costs...

what other check valves could i use?

any info apprecaited,

or should i just rather get the importparts.com missing link
for the 88-91 EF cars instead...




[Modified by Giuseppe, 10:30 PM 2/3/2002]

speedworks

use 1 valve for every 5 pounds of boost

turbocoupe

I just use one "T" fitting. If the nipple is on I'm at 7psi. If I take it off I'm at 11psi. It works but it sucks. . .

Giuseppe

please explain

speedworks: im assuming if im running 6-7psi i'd need 2,
is this correct..??

intekragsr

someone please post a picture

Hybrid

a pal of mine is running a single honda check valve with 10psi of boost. It runs great and is the way to go from what he tells me. I will be using it.

ekb18c

You should run atleast 4 check valves. 2 may not be enough and your map might just read boost.

HTH

RGAZ

I know there are pictures out there, i just can't find them. You will need two check valves and two tees.

Plumb it like this:

manifold----tee------tee------MAP
...................|...........|
................valve.....valve


The valves should vent out to atm under boost. Basically, you are bleeding boost away so the MAP doesn't see it. If you get a CEL then add another valve. I use Tetra brand valves, they are clear with black rubber valving.

Randy


[Modified by RGAZ, 10:30 AM 2/4/2002]

therealciviczc

I run 3 in mine at 5lbs. It just depends on the size and quality of the valve. I got mine for $1.99 each at the local aqarium place. With 3, mine idles great, and never gets a code.

I don't have a picture, but this is about as simple of a procedure as you're ever going to do...

I just put three T's in a row in the line running from the throttle body to the Map sensor. I then put a check valve on each of the open ends of each T.

THROTTLE BODY: ---- TTT---- :MAPSENSOR
| | |
:CHECK VALVES


You want it so that the air goes out the valves and in to the open air under boost, but at vacume it can't pull air in from the open air.


DOH!!!! RGAZ posted his while I was working on mine and his is better!!





[Modified by therealciviczc, 4:34 PM 2/4/2002]

JM Performance

you really just need one.....like this:

TB ----Valve----map

works just like the missinglink.

then you make a bracket or something to remount the map sesor.


[Modified by 00SilverLS, 11:40 AM 2/4/2002]

Giuseppe

most of the people ive talked to are worried about these
fish ''check valves'' failing because of extreme under hood temperatures,

the brake booster has such a check valve, and its pretty
happy with under hood temps,

is my thinking in outer space, or would the valve, be adequate for this...???
feedback please, ....!!!!!

only problem is mating the tiny map hose to the massive valve...

Hybrid

nope, thats the one a pal of mine is using. He has not had a hitch with it. He is only using one valve also and is running approx 8-10 psi of boost.

Giuseppe

thanks to everyone for the help, info and diagrams,
i think im going to try the brake booster check valve method,

im going to rig one up in series, and see what heppens.
Ill probably add another and go from there.

more valves doesnt impeed function, or does it..??

thanks again

dustin

Nah, the cheapie check valves cannot handle pressure. This is why everyone uses them to bleed off boost... then they only see mild vacuum.

Dustin