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 FPR + parallel fuel rails etc..

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maca

maca

Posts : 3232
Join date : 2010-05-30
Age : 36
Location : Easington Lane

FPR + parallel fuel rails etc.. Empty
PostSubject: FPR + parallel fuel rails etc..   FPR + parallel fuel rails etc.. EmptySat 12 Oct - 23:36

At what point do you need a fuel pressure regulator + parallel fuel rails?

Are they only required when going for silly power? Number chasing? Rolling Eyes
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Jonny Gav
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Jonny Gav

Posts : 6837
Join date : 2010-03-12
Age : 49
Location : Durham

FPR + parallel fuel rails etc.. Empty
PostSubject: Re: FPR + parallel fuel rails etc..   FPR + parallel fuel rails etc.. EmptyMon 14 Oct - 9:28

You can fit them at any power but due to fuel delivery being more critical the higher you go power wise, they become a must have rather than a nice to have at over 500hp I would say. Without them you need to add extra fuel to compensate for the likelyhood that 1 cylinder is running weaker than the others.

Remember when the AFR's are taken they are an average of all 4 cylinders, parallel fuel rails can get you closer to having equel fuel across all 4 allowing the fueling to be leaned out, this gives more power.
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stevejones

stevejones

Posts : 1433
Join date : 2010-03-22
Age : 46
Location : durham

FPR + parallel fuel rails etc.. Empty
PostSubject: Re: FPR + parallel fuel rails etc..   FPR + parallel fuel rails etc.. EmptyMon 14 Oct - 10:53

sorry to jump on your thread Embarassed i have a fpr to fit on mine, is there any point now that its been mapped or should i just sell it
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maca

maca

Posts : 3232
Join date : 2010-05-30
Age : 36
Location : Easington Lane

FPR + parallel fuel rails etc.. Empty
PostSubject: Re: FPR + parallel fuel rails etc..   FPR + parallel fuel rails etc.. EmptyMon 14 Oct - 11:21

Jonny Gav wrote:
You can fit them at any power but due to fuel delivery being more critical the higher you go power wise, they become a must have rather than a nice to have at over 500hp I would say. Without them you need to add extra fuel to compensate for the likelyhood that 1 cylinder is running weaker than the others.

Remember when the AFR's are taken they are an average of all 4 cylinders, parallel fuel rails can get you closer to having equel fuel across all 4 allowing the fueling to be leaned out, this gives more power.
Cheers Jonny that's exactly what I needed to know! I would say mines only running 360ish max so I wouldn't need a FPR but I take it I would need a map tweak if I went with parallel fuel rails from what you are saying?
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Jonny Gav
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Jonny Gav

Posts : 6837
Join date : 2010-03-12
Age : 49
Location : Durham

FPR + parallel fuel rails etc.. Empty
PostSubject: Re: FPR + parallel fuel rails etc..   FPR + parallel fuel rails etc.. EmptyMon 14 Oct - 21:16

To take advantage of it, yes.

Steve- no point mate, get some cash for it.
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