you need fuel up top in a bad way

 

was hoping someone could pin point my issue up top
ive tried playing around with a few things to it smooth off,

do you know what afrs i should be aiming for

this is what i have

 

you are likely out of pump

 

you on ethanol?

 

ive tried adding fuel in the dip but it gets worse ive also played with the ignition but still not been able to get rid of the dip

my first thoughts were it was aroung the limits of the intake manifold ??
any thoughts

 

no just on pump fuel 99 ron here in uk

 

the car is not running lean on these runs its holding at around 11.8

and no knock retard

 

more than likely camshaft/head

 

which 2.2 do you have? the L61 or LAP?

 

so your AFR is logged with Wideband?

 

yep



red line here

 

its a L61
we call it z22se in the uk
it uses a difefrent ecu i think

the engine is actuall originally a saab b207 2.0 with the craank out of the z22se (2.2) with forged pistons rods cams (zzp stage 2) valve springs etc

 

new shift light

 

what pulley are you on?

 

I'm on a 3.1"

 

 

Can't comment on the issue, but it looks like your scales are a little off on the Y axis...
Nice to see 300ftlb of torque at only 2k rpm though!