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SilverGhost
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Location:
Sydney
Registered:
September 2004
Re: turbo's ( AFM with bov?) Mon, 16 May 2005 08:54 Go to previous messageGo to previous message
feral4mr2 wrote on Sun, 15 May 2005 21:42

a atmo bov on a AFM will normaly cause you to run rich on gear shift. sometimes people may see a puff of black smoke after gear change on a atmo afm turbo engine. excessive richness can wash the bores which in turn can wear the rings down faster.

i run a atmo bov on my AFM 4agte, the engine still runs fine so it doesnt bother me. though the noise starts to get annoying after a while. Rolling Eyes
will be converting mine to a plumb back once i make the adaptor.


I have an Atmo BOV on my 3SGTE equipped with AFM (came with the car, when i can afford it im going plumb back too) and most of the time it behaves normally, but occasionally the richness can cause a small backfire after changing gears if the cat/exhaust is hot enough.

To answer your question about how the AFM behaves. My S-AFC shows my AFM opening as a precentage. I have watched this when I change gears under boost, and when the throttle closes and the BOV operates the AFM spikes along with the psssht (sorry, didnt mean to go all technical there Very Happy ) Because air is now allowed to flow thru the BOV, not the throttle this adds to the richness, and out of whack A/F ratios.

However once the BOV closes and your driving away there doesnt seem to be any after effects to this A/F ratio change. Although some people have posted that their engine runs rough for a period after the BOV operates.
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SubjectPosterDate
Read Message   turbo's ( AFM with bov?) carsanactraSun, 15 May 2005 07:57
Read Message   Re: turbo's ( AFM with bov?) NorbieSun, 15 May 2005 08:03
Read Message   Re: turbo's ( AFM with bov?) carsanactraSun, 15 May 2005 10:23
Read Message   Re: turbo's ( AFM with bov?) feral4mr2Sun, 15 May 2005 11:42
Read Message   Re: turbo's ( AFM with bov?)  SilverGhostMon, 16 May 2005 08:54
Read Message   Re: turbo's ( AFM with bov?) NorbieSun, 15 May 2005 11:38
Read Message   Re: turbo's ( AFM with bov?) EMP-2TGSun, 15 May 2005 12:37
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