Is This A Normal Vacuum Reading At Idle?
#1
Is This A Normal Vacuum Reading At Idle?
The reason why I ask is because I recently added a BBK Full and got tuned a few weeks ago. Prior to the tune and with the stock turbo, vacuum was sitting at around -13hg. Even on the drive with the new turbo to get tuned, it was sitting at the same vacuum. People told me vacuum shouldn't change with the turbo swap. But after the tune, this is what it's been sitting at.
My BOV (Tial QR) now flutters at full boost with the new set up. I got the 6psi spring with it, which according to every chart, is the correct one for my vacuum reading and the lowest I can go..
http://www.tialmedia.com/documents/BOVspc.png
Any help is appreciated.
Last edited by CJ2X; Nov 11, 2012 at 08:10 PM.
#2
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Normal vac should be around -18 to -20. With cams it usually drops ( example 272's put you around -10). If your on stock cams, you have a big problem. The flutter is probably vac related at it works off a vac like. Have you done a boost leak test recently?
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Now that the vacuum line issue is resolved, lets move onto discussions and feedback on the BBK!
Did you get the BB version? If not, what led you to choose the JB over the BB?
Did you get the BB version? If not, what led you to choose the JB over the BB?