better fuel rails (Vishnu or Perrin)?
#3
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parallel fuel rails are parallel fuel rails. the only really important thing is that they are parallel instead of series (like the stock rails). i haven't seen the vishnu rails, but the perrin rails are nice and balanced. even the fuel lines from the "T" section to each rail are equal length.
#4
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Originally Posted by RussB
parallel fuel rails are parallel fuel rails. the only really important thing is that they are parallel instead of series (like the stock rails). i haven't seen the vishnu rails, but the perrin rails are nice and balanced. even the fuel lines from the "T" section to each rail are equal length.
#7
pardon the noobass hijack, but are aftermarket fuel rails required to get enough fuel into the motor after a turbo swap (say an IHI turbo for example, nothing crazy), or are the stock rails adequete?
#8
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They aren't required, but there's speculation that at higher horsepower levels fuel pressure in the rails can start to oscillate and get uneven. No direct evidence of it though.
#9
Originally Posted by BAN SUVS
They aren't required, but there's speculation that at higher horsepower levels fuel pressure in the rails can start to oscillate and get uneven. No direct evidence of it though.
#10
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Yeah, 400hp+ is a good guess. Like I said, there's not really a quantified point where the rails start having defined flow issues, it's just speculation and anecdotal evidence.
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