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How much fuel pressure?
Posted: Tue Oct 21, 2014 5:28 pm
by mgbloke
Just wondered what is normal for fuel injection pressure at the rail. Mine has been set to nearly 70psi which seems high. I have had a lot of running problems.
Cheers
Re: How much fuel pressure?
Posted: Tue Oct 21, 2014 5:50 pm
by stevieturbo
mgbloke wrote:Just wondered what is normal for fuel injection pressure at the rail. Mine has been set to nearly 70psi which seems high. I have had a lot of running problems.
Cheers
Common is 3 to 3.5 bar no vac attached.
70psi would be higher than most people would use.
I assume you have an adjustable reg ?
Posted: Tue Oct 21, 2014 8:42 pm
by SimpleSimon
Depending on the style of injectors being used you got to be careful running those kind of pressures as it also interferes with the inj opening & closing op
a very strong possibility this could be your running woes
whats the motor/spec?
Posted: Tue Oct 21, 2014 9:55 pm
by mgbloke
Thanks,
Its 4.8L, Merlin heads, mechanical 238cam 10.8:1 cr
I bought the Used Throttle bodies (45mm) complete with the injectors.
There is an intermittent sort of misfire when it happens the engine is reluctant to rev and feels flat.
I am About to upgrade to a 5.0L engine with TA heads. what size injectors do I need?
Cheers