NZ_87_TURBO

Got the car on the dyno last week and got 215rwkW at 9psi on the TO4b Vtrim hybrid and e6x. had wastegate problems so couldnt build more boost than that, shortly after of during dyno the wastegate arm snapped of the flapper ( 2nd time )

So im about to put a T60-1 hybrid on the car this week and was looking at my fuel maps to see if i could clean them up abit before going back on the dyno as i ended up making the adjustments while the dyno guy did the gas then the dyno controls.

Heres my query, does the fuel decrease with rpm and load increases?
Im looking at a map that the previous owner of my e6x had and he ran a T70 and got 300rwkW and the T60-1 ain that much smaller, so im looking at this map for reference.
Im noticing at after 5500rpm on his map the fuel starts to decrease across the range. Im new to this so could a tuning specialist explain to me why this is?

C. Ludwig

iTrader: (27)

If peak torque is occurring at 5500 rpm then it's possible that the fuel demand will decrease as revs increase. You'll see peak fuel consumption at peak torque which will correspond to peak VE, over and under peak the VE is not as good so you'll need less fuel per cycle as the engine is not pumping as much air per cycle. So, it's possible it's a good tune. Peak torque at 5500 is a little low in the rev range, but entirely possible with the right combination of parts.

NZ_87_TURBO

on my tune, looking at the dyno print out i was getting peak torque 600Nm at 6300rpm along with peak power.
I believe i was having an issue where the heat and pressure that snapped the wastegate arm off the flapper would have been bending it prior to it snapping, causing it to not close properly and build boost late in the rpm range 5000rpm was when it hit 9psi

BDC

^^^ What Chris said. Fuel curves will follow that rule. They'll rise, plateau at torque peak, then steadily fall. It all follows the VE of the motor as it goes through its RPM ranges.

Second thing while I'm thinking about it -- view the fuel curve in 2D instead of 3D.

B

NZ_87_TURBO

in 2D was where i noticed it, i just used a 3D map to show the example,
Thanks for the input guys