Hey guys,
A friend of mine has an Evo 6, where he did a dyno run, and the operator informed him that the car was runing lean. How lean, i don't know, the operator never told him.

Here is a list of the car's modifications:

ARP bearings
ARP stutds full set head crank con rods
brain crower con rods
jun pistons
jun 272 cam kit
head been polished
jun cam pullys
SARD 720cc inj
HKS fuel line
sard fuel reg
welbro 255 internal fuel pump
BOSCH 044 extranel fuel pump
XS fuel filter
biltz exhaust system 3inch
blits air intake
APXI power FC
hks twin plate clatch
i fitted a supra alumine radeitor
HKS SSQ blow off v
i got the battery kit in the trunk
fuel catch tank
Stock turbo
Stock intercooler

Now, i told him that this fuel system is more than capable of supporting 600+Bhp. His current fuel pressure is 52psi, and 59psi static (with the vaccum hose disconnected).

Any ideas what to check?

 

You sure an EVO 6?

They where never sold in the US

 

how bout do the smartest thing and invest in a wideband o2

 

That was a little harsh lol

 

How so? im not gonna listen to some random guy tell me my car is too lean if he cant even tell my what my AFRs are. Your better off buyinh a wideband o2 and knowing what AFRs your at before you try fixing it. Who knows it could be at like 11.1 then he fixes it and goes to rich. Im all set with playing the guessing game esspeically on something that means the differece of power and safty or a blown motor

 

LOL aight chiiiil

 

Ok, i am not located in the US, hence why the car is an evo 6.

As for the wideband, that is what i informed me friend, Infact, that is what i tell nearly anyone i meet with a tinkered car. But they don't listen, and there is only so much you can do......

Ok, is it common to install FUEL catch can's in Evos? is it also comon to install TWO fuel pumps in evo's? if so, anyone knows where i can get a diagram showing how and direction of everything pluged in?

 

You must be from the UK. Where abouts?