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Topic: Fuel pressure (Read 553 times) previous topic - next topic

Fuel pressure

I'll be adding a precision T3T4 turbo (I'll be selling my Garrett airesearch T3 after i get it rebuilt along with the header im currently using. So send me a PM if youre interested) here pretty shortly as soon as a get my header and a few other things back from Jangus. With this bigger turbo, id like to turn up The fuel pressure to run my injectors at a 90-95% pace but i was wondering what the fuel pressure needs to be at to accomplish that. I have an autometer electric fuel pressure gauge to monitor it. Any tips or help will be appreciated. Thank you.
1987 turbo coupe 5speed: Boport stage 3 head/2.5 cam , Precision stage 3 50trim .63 turbo, Tial 38mm wastegate, Jangus gutted/ported intake manifolds, 60mm tb, Jangus open dumptube, Jangus 3" elbow, Perrin boost controller,Esslinger adjustable cam pulley, Esslinger small crank pulley, stinger FMI, RFL BOV, Spec stage 3 clutch, B&M short throw, 140 speedo, Walbo 255lph, BBK fpr, 3G alternator, ARP studs.  Be faster... :poke:
 

Fuel pressure

Reply #1 –
Increasing fuel pressure does not increase duty cycle, it pushes more fuel through for the same amount of dwell(open) time... The TC is basically setup to add a pound of fuel pressure for each lb of boost, keeping the stock hookup will do just that... The tune should be checked or at least install a wide band A/F gauge so you know what the ratio really is, too rich and your loosing power, too lean there goes the head gasket and maybe a piston...