Fuel Pressure

[RAGOONEY]

If I was running 20psi boost what fuel pressure would I hope to see when on boost?

[rs250nut]

I may get shot down in flames for this but is it not 4psi above what boost you are using?

[RAGOONEY]

I may get shot down in flames for this but is it not 4psi above what boost you are using?

The racetech fuel pressure gauge I have only goes upto 15psi
unless fuel pressure is measured on a different scale.....confused

[Brigsy]

I may get shot down in flames for this but is it not 4psi above what boost you are using?

As far as im aware thats correct, the fuel pressure with o.e reg in situ should be 4 psi above boost pressure (ive always assumed thats boost pressure at carb top too as thats the reference)

[RAGOONEY]

As far as im aware thats correct, the fuel pressure with o.e reg in situ should be 4 psi above boost pressure (ive always assumed thats boost pressure at carb top too)

So for example running 12psi boost, would mean 16psi fuel pressure....so off the scale...

[Brigsy]

Most likely, that gauge is probably more suited to carbs(i.e low pressure n/a) or low fuel pressure setups.

[RAGOONEY]

Most likely, that gauge is probably more suited to carbs(i.e low pressure n/a) or low fuel pressure setups.

do you know where I could get a fuel pressure gauge to suit the 5???

[raj]

is the std fpr ok at handling 20psi of boost.? or should i look into an aftermarket variant? any suggestions?

[Andrew Cooke]

do you know where I could get a fuel pressure gauge to suit the 5???

have you tried asking racetech?

[Andrew Cooke]

http://www.raceparts.co.uk/racetech/instruments.htm

[Brigsy]

is the std fpr ok at handling 20psi of boost.? or should i look into an aftermarket variant? any suggestions?

Std fpr is fine for 20 psi. Id steer clear of any aftermarket regulators unless you really need one.

[raj]

Std fpr is fine for 20 psi. Id steer clear of any aftermarket regulators unless you really need one.

note taken