BF xr6 Turbo reflashing

Hi, I am completely new to tuning EFI cars, I have been playing with my xr6 turbo using hp tuners and I am having trouble with fueling up high. It leans out from 3000rpm and I cannot get any more fuel, I have been told I need to adjust injector high slope to match my base fuel table, is this correct? and how is this done?. and under wot on a ramp run my stft is huge is this normal? or have I missed something?, my afrs are 11.7 but to achive this I had to bleed boost off from 10psi at 3000rpm right down to 6 because I could not command any more fuel up high. the power is at 285hp at the moment and I don't think the injectors are maxxed out at this power. please help im loosing my mind>>>>> I have attached my tune

I have been using BASE FUEL to adjust my fuel as you can see the higher values are at 0.35 lambda, I cant work out what other fuel tables I should be using

Hi Ryan,

The high slope and low slope parameters are used to define the injector flow and these only need to be adjusted when you swap to a different set of injectors. The base fuel table is where you need to make changes The STFT reading in the VCM Scanner does do some strange things on the XR6 turbo and I can't tell you why but I don't believe the massive positive trim is real - I see this even on a 100% stock car.

The fuel system in the BF is a little marginal and you can exceed the injector limits without too much difficulty but you should be able to get a lot further than where you are now, and the measured lambda should track your target pretty accurately. I'd guess at this stage there is a problem with your fuel system. I'd start by checking the fuel pressure during a full power run and confirm it isn't dropping off. I'd also check your actual injector duty cycle and see where you are in this regard.

I'll just add a little more to my previous comment - In stock form you should find that the measured lambda pretty closely tracks the target in the base table, however particularly as you modify the engine and affect the VE, you'll find that some error creeps in. In this case you can make adjustments to the 'MAP at Zero Airmass IMRC Open' table. This table uses cam angle as an axis so to make adjustments to the right cell in the table you'll need to log cam angle. If you increase the values in this table it will result in the measured lambda moving leaner and vice versa.

Thanks for the reply, I will hopefully get it back on the dyno today before I do I am going to pull the injectors out and put them on my flow bench, and I will check pressure during a ramp run. also what is the relationship between spart tables MBT and BORDERLINE KNOCK ? I found the car to have a lot of knock retard in standard form, I removed 1/2 degree in the areas I was getting knock retard and it has stopped it and I didn't loose any power. do both tables have to be modified together?

The MBT timing table is used for the ECU's torque calculation algorithm. The borderline knock table is the one the ECU actually uses for ignition advance values, so this is where you should adjust timing.

For the FG Falcons I found a airflow tuning correction table under the speed density tab. With increased boost I found the lambda wasn't tracking the base fuel table numbers especially in the higher rom ranges. Fuel pressure remained constant and injectors were upgraded. Is the imrc table better to use than this table for an FG Xr6t?

Sorry to bring up an old thread,

I have a BF falcon i have converted from turbo to non turbo using the original non turbo engine. Now the engine is built with forged pistons and rods, valve springs, billet pump, bosch 1100cc injectors and Proflow Intake manifold. A local tuner flashed a turbo strategy over the top of my non turbo one and since then ive had some issues, mainly with random lean outs on cruise and idle. Sometime the aft doesn't follow the commanded afr which i've managed to sort out to a point by doing some maths and modifying the MAP per Airmass High Res tables at the desired cam angles and rpm.

Now i still have the BF non turbo camshafts, but also deep dish pistons. Do I need to modify the MAP at Zero airmass tables to get the fueling right? As there is a big difference between turbo and non turbo values in these tables.

Michael