Tial bov problem
Dec 4, 2018, 10:03 AM
#1
Tial bov problem
I just purchased a tial bov for my SD setup and had a few questions. I read around here that you are supposed to have a direct vacuum line to the intake manifold. Mine has a T-fitting in it for the boost gauge is this going to cause a problem? Also just without driving the car when I have it on and pressing the throttle the bov didn't want to open it self until I really revved it. Then it was opening but it still had a little bit of surge before it would open. I read in a thread on here that the user would get surge but after driving the car a little bit and with the spring getting some work in it the surge went away. I purchased the right spring according to the vacuum at warm idle chart(-20) so I am confused as to why its not opening as quickly and therefore surging
Dec 4, 2018, 10:21 AM
#2
EvoM Guru
iTrader: (1)
Need lighter spring. Stock Evo doesn't have -20psi vacuum, it has like 17-18in/hg of vacuum, which is like -11-12psi. You can use the -10, but I put the -6 in every car and it works the best.
Last edited by letsgetthisdone; Dec 4, 2018 at 10:31 AM.
Dec 4, 2018, 01:34 PM
#4
EvoM Guru
iTrader: (1)
Dec 4, 2018, 02:10 PM
#5
http://www.tialsport.com/documents/w3_tial_qqr_sp.pdf
I know it is rated in psi. But if I am going by the chart that I linked above from the tial website my vacuum reading would land me on the -11psi spring.
I know it is rated in psi. But if I am going by the chart that I linked above from the tial website my vacuum reading would land me on the -11psi spring.
Dec 4, 2018, 02:29 PM
#6
EvoM Guru
iTrader: (1)
Do what you want. The -6psi works best for least flutter.
Dec 5, 2018, 05:16 PM
#8
EvoM Guru
iTrader: (1)
Tial's recommendation doesn't work for stock frame turbo's on these cars. They ride the surge line too tightly and make the BOV flutter.
Dec 6, 2018, 08:18 AM
#11
EvoM Guru
iTrader: (1)
Yes, the -6 works the best.
I wouldn't tee the boost gauge into the BOV line. Delete the FPR solenoid on the intake manifold, then tee into the line from the manifold to the FPR.
I wouldn't tee the boost gauge into the BOV line. Delete the FPR solenoid on the intake manifold, then tee into the line from the manifold to the FPR.
Dec 6, 2018, 10:12 AM
#12