330cc w/ sfmu

[boostedclipse97]

Right now im running about 7-8psi.. with an sfmu, stock injectors, bigger fuel pump... and my idle fuel pressure is set to about 50psi.. i plan on buying bigger injectors 330cc and turning the fuell pressure down to about 20psi.. does this ratio sound about right?? and is anyone running something close to that

 

[rstare]

Probably a little higher, Chris is using 450cc injectors and he is at 20psi, so I would say you need to be higher. If you get a wideband you will be able to tell perfectly where you need to set your fuel pressure.

 

[boostedclipse97]

Probably a little higher, Chris is using 450cc injectors and he is at 20psi, so I would say you need to be higher. If you get a wideband you will be able to tell perfectly where you need to set your fuel pressure.

thants.. i also have 450s in my garage from a 1g.. i was thinkin about installing em but i need to find a resistor pack... no luck yet

 

[rstare]

I would get that resistor pack and use the 450cc injectors if I were you. In order to get that low of fuel pressure you will need -6an line, -4an is too small, Chris' experiment has proved that to us.
If you go to 420a turbo conversion forum and look under sfmu fuel pressure too high post, it should be the second from the top, youll see what im tlaking about