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  • Member
  • Member For: 12y 11m 19d

thanks alot guys for the addivce healps alot. if theres anything else I should no about when im doing all these mods and if I missed anything please let me no some good tips.

another question. does it matter if my cold air intake is 3.5inch or 4 inch ? and my dump and front is 3.5 or 4 inch ? for power.... I no bigger should be better but does it matter?

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  • 4 weeks later...
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  • Donating Members
  • Member For: 17y 5m 29d
  • Gender: Male
  • Location: Probably above atmospheric pressure

Or do 170,000km on your standard BFII valve springs, with 300+rwkw since 100,000! Just found out mine are soft, but I've suspected for quite a while.

  • Donating Members
  • Member For: 15y 7m 13d
  • Gender: Male
  • Location: Mackay QLD

Trav199 had similar mods to what youve got planned. Just a surge tank added to his.

Made 377kw. Only drove it for a month till changed out valve springs while changing a noisey lifter.

  • Donating Members
  • Member For: 13y 11d
  • Gender: Male
  • Location: Canberra

No such thing as a stupid question. It's when your springs cant keep the lifter/follower (whatever they are called in OHC) seated on the cam at higher RPM.

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  • Donating Members
  • Member For: 17y 2m 4d
  • Gender: Male
  • Location: Vic

Valve float? Or valve springs going on soft? They start to float at higher revs afaik, I think I've heard that some tuners can see it on dunk sheets too?

Mine have gone soft after 18months of mid 300s.

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