What psi should the stock diverter valve hold?
#1
Evolved Member
Thread Starter
iTrader: (33)
Join Date: Mar 2003
Location: PA
Posts: 1,348
Likes: 0
Received 0 Likes
on
0 Posts
What psi should the stock diverter valve hold?
I'm trying to diagnose a problem with my diverter valve but not getting much feedback here: https://www.evolutionm.net/forums/sh...d.php?t=276307
So here are two specific questions:
- What psi should the stock diverter valve (the IX metal one) hold with no positive pressure input into the vacuum nipple
- What psi should it hold if I provide positive pressure into the vacuum nipple.
I am suspecting that my diverter valve broke as I can't even to get it to hold 1 psi with the vacuum nipple at atmospheric pressure. My guess is that is should hold around 6psi....no?
(I'm trying to test my valve similar to as what is described here: http://dv.mistertam.com/)
Thanks.
So here are two specific questions:
- What psi should the stock diverter valve (the IX metal one) hold with no positive pressure input into the vacuum nipple
- What psi should it hold if I provide positive pressure into the vacuum nipple.
I am suspecting that my diverter valve broke as I can't even to get it to hold 1 psi with the vacuum nipple at atmospheric pressure. My guess is that is should hold around 6psi....no?
(I'm trying to test my valve similar to as what is described here: http://dv.mistertam.com/)
Thanks.
Last edited by xtnct; Jun 12, 2007 at 05:54 AM.
#2
Evolved Member
iTrader: (1)
Join Date: Mar 2005
Location: Mesoamerica/ SF Bay Area
Posts: 7,905
Likes: 0
Received 5 Likes
on
5 Posts
This is a good question and I'd like to know the answer as well. The example of the metal DV I had on my car was already venting noticeably at 10-11 PSI. The spring itself is pretty weak and I'd guess that it's starting to lift as early as 7#. This is just a guess though as I've tinkered around with mine somewhat and eventually crushed it and finally tossed it into the trash bin.
I too would like to know if anyone has measured at what PSI the valve cracks off its seat. Incidentally, what sort of device do you use to measure this?
I too would like to know if anyone has measured at what PSI the valve cracks off its seat. Incidentally, what sort of device do you use to measure this?
#3
Evolved Member
Thread Starter
iTrader: (33)
Join Date: Mar 2003
Location: PA
Posts: 1,348
Likes: 0
Received 0 Likes
on
0 Posts
All you need is a pump and a bike tube... browse this link for pics and testing instructions: http://dv.mistertam.com/
#7
Evolved Member
Thread Starter
iTrader: (33)
Join Date: Mar 2003
Location: PA
Posts: 1,348
Likes: 0
Received 0 Likes
on
0 Posts
Ok, I build a little test rig, same PSI input to vacuum nipple now as the valve. See pic.
It does not hold pressure too well. If I pump up to ~25-20 psi, air leaks out almost as fast as I put it in. I assume that it should be able to hold 20 psi without issues for at least a few secs. At ~15-10 psi, the leaking is slower, but it eventually all leaks out within ~10 secs.
Can anyone repeat this test with a good valve and post your results?
This seems to be consistent with my car's behavior. I guess I'll have to buy a new valve... can't be bothered with dealing with warranty, too much aggravation from past experiences...
It does not hold pressure too well. If I pump up to ~25-20 psi, air leaks out almost as fast as I put it in. I assume that it should be able to hold 20 psi without issues for at least a few secs. At ~15-10 psi, the leaking is slower, but it eventually all leaks out within ~10 secs.
Can anyone repeat this test with a good valve and post your results?
This seems to be consistent with my car's behavior. I guess I'll have to buy a new valve... can't be bothered with dealing with warranty, too much aggravation from past experiences...
Trending Topics
#8
Evolved Member
iTrader: (12)
Ive done the same thing a while back , my tester looked very similar .
From what ive found . The plastic 8 bov leaked @12-13psi , The IX bov leaked @24-25 psi and I also tested a HKS SSQV and it held to over 40psi .
The make sure I was hearing the leaks I put the BOV under water land looked for the bubbles . The IX BOV leaked very little @24-25 psi but i saw some bubbles , 26-27 psi was a lot of bubbles .
Sounds like your IX bov is not working like the one I tested , just for fun try the same test but put the hose from the tester on the discharge side of the BOV and retest . IT should NOT LEAK at all , if it does leak it prob more of a the piston (of the BOV) not sealing . If thats the case check for dirt where the piston seals to the valve body .
Thread
Thread Starter
Forum
Replies
Last Post
Chris@nolimitmotors
Evo 'For Sale' External Engine / Power
447
Dec 26, 2018 04:09 PM
itsdecker
Evo Engine / Turbo / Drivetrain
13
Oct 1, 2016 07:14 PM
xtnct
Evo Engine / Turbo / Drivetrain
12
Jun 14, 2007 08:21 PM