what pressure

[troubled4g64t]

So here is the deal just about to start car finally after i fix an oil leak but need to know if anyone has a ballpark on were I should set my afpr till its tuned not looking for long answerjust ideas

4g64 block
kia head
evo im
evo tb
660cc injectors
255lph fp

stock psi is somewhere around 42 i believe turboed and waste gate set for 10 psi.

[underated]

what regulator are you using? and what brand are the 660cc injectors? just set it to stock or what ever the manufactures rating is to get 660cc's. you can adjust it from there when tuning

[keith6110]

you should be fine at the evo's stock psi of 42. My brother was worried about being too lean so he was set at 44psi on his fuellab regulator until he was tuned.

[underated]

it all depends on what rating the maker specifies for the 660cc's. not all cars run the same fuel pressure. so if those injectors are rated for 660cc's and 55psi then running 42psi is not going to get you the results you want.

if they are denso 660 they advise 45-47psi to get the full 660cc's

[keith6110]

it all depends on what rating the maker specifies for the 660cc's. not all cars run the same fuel pressure. so if those injectors are rated for 660cc's and 55psi then running 42psi is not going to get you the results you want.

if they are denso 660 they advise 45-47psi to get the full 660cc's

ahhh... I was unaware of different brands had different psi ratings. I've only dealt with the oem injectors.

Hand me a red nugget for bad info lolz!

[underated]

naw its all good. its just different some times. like srt-4' have 58psi fuel pressure and there injectors are rated at 577cc for the 04+

here is a good link i wish it showed the fuel pressures tho
http://www.robietherobot.com/storm/f...ectorguide.htm

[troubled4g64t]

ok see thats the info i wanted to know I have rc engineering injectors and im in the oil business and the nozzels used in oil burners is based on 100psi so higher psi means more fuel.

[underated]

exactly... but injectors have a "working" pressure range

rc's are 660 CC's / MIN @ 43.5 PSI
Min 30 PSIG / Max 100 PSIG