lukexr61988 Member 191 Member For: 16y 9m 27d Gender: Male Location: NSW sydney Posted 20/04/09 06:42 AM Share Posted 20/04/09 06:42 AM my question is how many guys with bf's changed their valve springs when getting close to 400rwkw? at the moment iv got 360rwkw and iv been told my valve springs should be changed if I want more power but from what iv read on here the bf springs should be alright for that much, sorry if its been coverd already but did a search n couldnt find anything Link to comment https://www.fordxr6turbo.com/forum/topic/56916-bf-valve-springs/ Share on other sites More sharing options...
jaymen Member 57 Member For: 16y 20d Gender: Male Posted 13/06/09 09:36 PM Share Posted 13/06/09 09:36 PM Yeah this is something I would like to know too^^^ I don't want to change my Valve springs until I really need too... so does anyone know what are the STOCK BF Valve springs good for eg: 360-400rwkw's??? Link to comment https://www.fordxr6turbo.com/forum/topic/56916-bf-valve-springs/#findComment-890594 Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 18y 4m 6d Gender: Male Location: SW Sydney Posted 13/06/09 11:42 PM Share Posted 13/06/09 11:42 PM They may be ok to start with, but they will start to go soft over time. It also depends on how much boost you use to get to 400. IF your system is really nice and hi flow then you won't have too much trouble, but if you push north of say, 17psi, with a restrictive exhaust then you may find some float. Link to comment https://www.fordxr6turbo.com/forum/topic/56916-bf-valve-springs/#findComment-890622 Share on other sites More sharing options...
mr gsr Member 46 Member For: 17y 1m 3d Posted 14/06/09 03:05 AM Share Posted 14/06/09 03:05 AM My BFII valve springs died around the 320rwkw mark...... Wasnt evident when running the F6 intake at this level on 15psi....Same power on 12psi with opened up intake and had springs issues immediately.....After changing the springs, made a HUGE difference.. Link to comment https://www.fordxr6turbo.com/forum/topic/56916-bf-valve-springs/#findComment-890686 Share on other sites More sharing options...
01txr Member 861 Member For: 18y 4m 30d Gender: Male Location: QLD Posted 14/06/09 08:27 AM Share Posted 14/06/09 08:27 AM Dont gamble your engine on valve springs, if people are saying they have had problemsat 320 rwkw well best change them.One stray value will destroy your engine.Fit valve springs set you back under $1000 you dont want to add a engine to the cost. Link to comment https://www.fordxr6turbo.com/forum/topic/56916-bf-valve-springs/#findComment-890827 Share on other sites More sharing options...
XRT Man Member 69 Member For: 16y 8m 26d Gender: Male Location: perth Posted 14/06/09 08:34 AM Share Posted 14/06/09 08:34 AM I agreeeeeeeee Link to comment https://www.fordxr6turbo.com/forum/topic/56916-bf-valve-springs/#findComment-890831 Share on other sites More sharing options...
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