601Turbz Member 111 Member For: 14y 6m 2d Gender: Male Posted 25/06/12 01:57 PM Share Posted 25/06/12 01:57 PM Hi guys, I was just wonering what did the BF MK11 also have upgraded valve springs? Or was it just the bottom end that was changed?Thanks in advance! Link to comment Share on other sites More sharing options...
MX Dave Donating Members 545 Member For: 13y 11m 4d Gender: Male Posted 25/06/12 11:04 PM Share Posted 25/06/12 11:04 PM Sure does. Still luck of the draw with valve float though. You may make 300rwkw or 350... 1 Link to comment Share on other sites More sharing options...
601Turbz Member 111 Member For: 14y 6m 2d Gender: Male Posted 26/06/12 10:07 AM Author Share Posted 26/06/12 10:07 AM Any ideas as to the tension difference between the standard and the upgraded F6 valve springs? Link to comment Share on other sites More sharing options...
MX Dave Donating Members 545 Member For: 13y 11m 4d Gender: Male Posted 26/06/12 10:10 AM Share Posted 26/06/12 10:10 AM Pretty sure they are the same mate. If you wanted to upgrade I wouldn't bother with genuine items.Try crow, Nizpro or atomic ones. Much better value for money! 1 Link to comment Share on other sites More sharing options...
turbowelshy89 Member 147 Member For: 14y 7m 11d Posted 26/06/12 07:51 PM Share Posted 26/06/12 07:51 PM My Ute was making 386rwkw with standard mk1 valve springs...Sent from my HTC Velocity 4G using Tapatalk 2 Link to comment Share on other sites More sharing options...
Ninka Donating Members 1,850 Member For: 22y 2m 13d Gender: Male Location: Perth, WA Posted 26/06/12 11:32 PM Share Posted 26/06/12 11:32 PM My Ute was making 386rwkw with standard mk1 valve springs...Sent from my HTC Velocity 4G using Tapatalk 2Good for you, BUT very unusual as stock springs were identified very early on as a weak point in making big numbers, and many have struggled at 250 rwkw or less Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 3m 13d Gender: Male Location: Probably above atmospheric pressure Posted 27/06/12 05:15 AM Share Posted 27/06/12 05:15 AM Also remember that they will get fatigued over time. I'm still using stock BFII valve springs in mine (low 300s rwkw) and have 165xxx km on it, but it has a bad idle sometimes after I boot it. Not consistently though so must depend on heat or something.Have a set of Nizpro ready to go in, when it gets more consistent. Link to comment Share on other sites More sharing options...
601Turbz Member 111 Member For: 14y 6m 2d Gender: Male Posted 27/06/12 08:18 AM Author Share Posted 27/06/12 08:18 AM Thanks for the responses guys. I'm not looking to chase any more than 330rwkw. My BFMK11 has only just ticked over 40,000km and has the usual mods. 3.5' dump, cat exhaust, injectors, cold air. Just waiting for fuel pump and injectors before retune (only has generic at the moment)But I am unsure whether to get 8psi or 10psi actuator. Is the Walbro GSS340 pump enough? Flows 255LPH. Link to comment Share on other sites More sharing options...
fordom Member 145 Member For: 15y 4m 13d Gender: Male Location: sydney Posted 27/06/12 09:29 AM Share Posted 27/06/12 09:29 AM mine had to be changed at 370ish rwkw, 08 bf f6. 47000km's Link to comment Share on other sites More sharing options...
MX Dave Donating Members 545 Member For: 13y 11m 4d Gender: Male Posted 27/06/12 09:53 AM Share Posted 27/06/12 09:53 AM Thanks for the responses guys. I'm not looking to chase any more than 330rwkw. My BFMK11 has only just ticked over 40,000km and has the usual mods. 3.5' dump, cat exhaust, injectors, cold air. Just waiting for fuel pump and injectors before retune (only has generic at the moment)But I am unsure whether to get 8psi or 10psi actuator. Is the Walbro GSS340 pump enough? Flows 255LPH.That pump will be fine, Although a surge tank and 044 would be the wiser option Link to comment Share on other sites More sharing options...
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