when raising boost do i have to increase fuel pressure
Turbo Mini Forums

for evrry 1 psi of boost i turn up, do i have to icrease fuel pressure at idle or not... thanks.. :)

no,

doesnt it need to be set at 4psi?

I think, covering all the questions you've just asked, you need to go away and do some reading up of the basics...

ie, use the SEARCH button.

For example, it is a fairly basic bit or required knowledge that a turbocharged car (using a blow through carb or fuel injection) requires the fuel pressure to be a set value above the incoming air pressure.

So you need a "rising rate" regulator - the Metro Turbo one is the obvious example - where you set the fuel pressure to be "x" PSI above atmospheric at idle (when there is no boost so the air pressure going into the carb is atmospheric) and then the regulator maintains this differential by increasing fuel pressure as boost increases.

That's why the regulator has a connection to the plenum to measure incoming air pressure from the turbo.

Schrödinger's cat - so which one am I ???

No,

the whole point of the pressure regulator is that it turns it up for you, just set 4psi at idle and the regulator does the rest.

website:- http://www.terryhunt.co.uk

thanks turbotel...