after swapping to a larger lower pulley and a HPX slot style maf this issue has been there and i cant make sense of it.
Base hpx maf curve is very rich (.66 ish lambda or 9.6/1 ish gasoline afr) after making a pull on the dyno go through the datalog and correct maf curve to command .76 lambda or 11.2/1 and its so off the chart lean (17/1afr)
So I think i screwed up my math and start over it does it again, so i try something and only remove 10% from the base curve just to see what happens and its the same thing. So i think maybe i lost a fuel pump or have a fuel delivery issue. But if i go back to the base curve its back to being really rich so im lost.
Obviously it has enough fuel if it can make a full pull in the 9's afr but why cant i find a happy medium?? Could it be a bad MAF? Load looks correct as its maxing out at 1.99 near 6k rpm. Im just not sure what im missing...
Tuning with Binary editor and quarterhorse hardware
basic rundown on build
ford lightning
.020 over 9to 1 compression
livernois ported 2V heads
comp stage 3 cams
whipple 3.4 20psi boost
hpx MAF
114lb injectors from fiveomotorsport
dual areomotive 340's with large feed and return
e85
viper T56 transmission
4.10 gears
Base hpx maf curve is very rich (.66 ish lambda or 9.6/1 ish gasoline afr) after making a pull on the dyno go through the datalog and correct maf curve to command .76 lambda or 11.2/1 and its so off the chart lean (17/1afr)
So I think i screwed up my math and start over it does it again, so i try something and only remove 10% from the base curve just to see what happens and its the same thing. So i think maybe i lost a fuel pump or have a fuel delivery issue. But if i go back to the base curve its back to being really rich so im lost.
Obviously it has enough fuel if it can make a full pull in the 9's afr but why cant i find a happy medium?? Could it be a bad MAF? Load looks correct as its maxing out at 1.99 near 6k rpm. Im just not sure what im missing...
Tuning with Binary editor and quarterhorse hardware
basic rundown on build
ford lightning
.020 over 9to 1 compression
livernois ported 2V heads
comp stage 3 cams
whipple 3.4 20psi boost
hpx MAF
114lb injectors from fiveomotorsport
dual areomotive 340's with large feed and return
e85
viper T56 transmission
4.10 gears