Whos RUnning a TIAL Q with no issues?
#1
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Whos RUnning a TIAL Q with no issues?
This isnt about MAF codes, its about the spring pressure in the TIAL Q's.
The old Tial 50mm BOV's worked great, and the spring normally used in teh EVO would be the PINK spring rated at -12.
When you go to Tials Website, you find that the Q dosent list the pink spring for -12psi anymore. it lists only for -11 psi and the -12psi is blank.
This also stands true for the QR but not the @lpha or 50mm models.
I ran the Tial Q with the pink spring and it leaked it would not hold 25 psi.
I took the same spring and installed it in a 50mm tial OG style and it worked fine.
if you look inside, the diaphram length is almost double in the Q making it obvious that the spring would not be as stiff in the Q as in the 50mm race valve.
So am I crazy, or did Tial replace the origional 50mm BOV with something that dosent work for EVo's and other high boost cras?
The old Tial 50mm BOV's worked great, and the spring normally used in teh EVO would be the PINK spring rated at -12.
When you go to Tials Website, you find that the Q dosent list the pink spring for -12psi anymore. it lists only for -11 psi and the -12psi is blank.
This also stands true for the QR but not the @lpha or 50mm models.
I ran the Tial Q with the pink spring and it leaked it would not hold 25 psi.
I took the same spring and installed it in a 50mm tial OG style and it worked fine.
if you look inside, the diaphram length is almost double in the Q making it obvious that the spring would not be as stiff in the Q as in the 50mm race valve.
So am I crazy, or did Tial replace the origional 50mm BOV with something that dosent work for EVo's and other high boost cras?
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I have the 11psi spring and the valve opens a tiny bit on neutral decel. It would probably be 'perfect' with another .5lb but i'm not using a MAF, so its not an issue.
I have the 11psi spring and the valve opens a tiny bit on neutral decel. It would probably be 'perfect' with another .5lb but i'm not using a MAF, so its not an issue.
#5
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I had a lot of issues when I first install the Q with stock maf...11 psi was too stiff and 8 psi the bov opened and closed whenever it wanted...10 psi is perfect...driveability is a lot better with the 10 psi spring...I plan on going SD soon so driveability will get even better...
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#9
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keep in mind i installed a old school 50mm in its place with the same spring, and its working like a champ.
Last edited by meat_EVO; Dec 13, 2010 at 09:11 AM.
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I use the tial QR with the 11psi spring and it works great. You have a boost leak from something else as some have mentioned. Check to make sure your bov is seated properly. I have this problem until it was fixed.
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im very interested to see pictures of this setup in an Evo engine bay, and possible sound clips?
edit: nvm, here is a sound clip off youtube: http://www.youtube.com/watch?v=LvnSg2MJNvU
edit: nvm, here is a sound clip off youtube: http://www.youtube.com/watch?v=LvnSg2MJNvU
#15
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thats compressor surge--^ has nothing to do with the bov
op..have you performed a boost leak test? simply replacing all lines is a waste of time. it could be a leak from a coupler, could be a leak from intake mani gasket, TB shaft seals, TB gasket, and all other vacuum lines. or the BOV might not be seated correctly. also make sure you have the right spring according to your inhg at idle. a spring in a q will react different in a old school and different in an alpha
op..have you performed a boost leak test? simply replacing all lines is a waste of time. it could be a leak from a coupler, could be a leak from intake mani gasket, TB shaft seals, TB gasket, and all other vacuum lines. or the BOV might not be seated correctly. also make sure you have the right spring according to your inhg at idle. a spring in a q will react different in a old school and different in an alpha
Last edited by 05VIII; Dec 13, 2010 at 10:17 AM.