Tial BOV opens/ stutters while on boost
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Tial BOV opens/ stutters while on boost
MY Tial BOV (QR) opens and stutters while on boost (before lifting throttle). The car is running V7 SD and I have noticed that playing with the MAP/VE/RPM table effects it, although I have not been able to fix it.
Is this purely a function of the spring in the BOV or is it related to my load and pressure settings for SD?
Any help or previous experience appreciated
Is this purely a function of the spring in the BOV or is it related to my load and pressure settings for SD?
Any help or previous experience appreciated
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I consistantly log -7/-8 PSIg at idle and I specified an "8" PSI spring when I ordered from Tial...
However I also specified silver and they sent me a red one so I guess that could also be a question.
I can hear the piston stuttering in the BOV and looking at my logged boost and WGDC I think I can rule out surge.
It seems to be sensitive to getting the load/pressure correct on my SD settings. My setting look a little different than the tuners that know thier SD so I'll start there.
Does anyone know if springs are interchangeable between the 50mm to the QR?
Thanks guys!
However I also specified silver and they sent me a red one so I guess that could also be a question.
I can hear the piston stuttering in the BOV and looking at my logged boost and WGDC I think I can rule out surge.
It seems to be sensitive to getting the load/pressure correct on my SD settings. My setting look a little different than the tuners that know thier SD so I'll start there.
Does anyone know if springs are interchangeable between the 50mm to the QR?
Thanks guys!
Last edited by 95630706; Dec 14, 2010 at 09:30 AM.
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I vote the spring is too stiff, drivability is directly affected by the bov being adj. correctly. I lucked out with a APS twin vent and when the spring is too stiff, there is part throttle flutter and abrupt blow off under heavy throttle light lift-off
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Yeah... I was initially annoyed by his post mostly due to the "search" comment, but after lowering WGDC in the problem areas it went away, so I guess I stand corrected. FORSAKEN's post was more helpful .
Throttle lift-off also makes a similar messy stutter instead of blowing off cleanly, this may be too (soft?) a spring?
**edit** saw post above, perhaps I should try an even soffter spring? Someone had good results on a 3 psi spring above...
Last edited by 95630706; Dec 14, 2010 at 12:46 PM.
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I'm too stupid to figure out boost error correction LOL. I 'm currently just using gear dependant WGDC like an EBC with everything else 0'd out. I think that will be my next venture once I get my SD tune nailed down. but yea that seems to be it.
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ECU controlled boost or a larger turbo I think are about the only ways to completely cure compressor surge, which I battle constantly due to my EBC/stock turbo. I build 24lbs of boost at half throttle @ 3500-4000rpm if I'm not careful how I accelerate. Drives me crazy.
Larger turbo wont build as much boost at part throttle, and ECU controlled boost will allow you to tune your boost curve according to throttle/load, so you can set it to build only 5-10lbs at normal driving, then full boost whenever you need it. This will be my next step....if the BT doesn't come first
Larger turbo wont build as much boost at part throttle, and ECU controlled boost will allow you to tune your boost curve according to throttle/load, so you can set it to build only 5-10lbs at normal driving, then full boost whenever you need it. This will be my next step....if the BT doesn't come first