Last Thursday I drove the GTV home.
The fueling was fine up to 0.2bar boost which is max in 1st and 2nd but from 3rd it increases to 0.4bar at which point it was a bit lean.
On Friday I fitted a primitive fueler I had lying in the garage and everything started working properly.
450cc injector in the boost pipe.
Pressure switch set to activate the unit at 0.15bar boost
With this fitted the car became strong in all gears but especially from 3rd upwards.
The Q2 works brilliantly to keep both wheels spreading the power between them. It is most noticeable when changing from 2nd to 3rd and from 3rd to 4th when she loose traction at 0.4bar boost.
Saturday I installed a fuel pressure gauge, ok it is a oil pressure gauge but work perfectly apart from the appalling Carbon look screen which I only noticed after the shop was closed.
The pressure censor
The gauge this is not a permanent install at this stage you can see the primitive fueler driver next to it. Yes it is the small black box.
The FPR I currently have in the car seems to be sticky and tend to keep a constant 3bar and when running against compression it decrease to 2.8bar but hesitates to return to 3bar. If the boost goes to 0.4bar the fuel pressure will or will not go to almost 3.5 bar and then it may or may not return to 3bar off boost.
I will be putting the cheap unit lying in my garage in to see what happens. The nice part of the FPR currently in the car is that it keeps fuel pressure even if the car stood overnight which is perfect. But the unwillingness to change pressure is dangerous.
In closed loop at -0.1bar the motor runs a bit lean probably since the Lambdas attempt leaning the mixture with the aggressive cams spilling raw fuel into the manifolds. So I will unplug the Lambdas as a test.
Next up will be changing the cam timing to decrease the overlap which should assist with closed loop running, Idle and manifold pressure since -0.1 bar at idle can not sustain the brake booster making it difficult for my wife to drive the car.
PS she enjoys the additional power and tends to let the rpm run in each gear until the boost starts picking up.
Wanted to fill the AC last night but one of the pipes had a little crack so should have it fixed this afternoon.