this is a supercharged 97 ta ,ported heads ,cam, intake ,headers, crane hi6 ,ect ect anways it pull hard to 5200 rpms 400 rwhp ,then drops. new pump opti hi6.255 fuel pump . has anyone seen this .

 

FMU? FP readings up top, o2 readings up top?

 

my guess is the injectors are maxed and its pulling timing out at top end. hook up auto tap and see whats going on. the injector duty cycle shouldn't go over 80-85%

what size are your injectors? please dont tell me stock

roadtrip

 

screw autotap slow azz crap get a scanmaster. and i second the injectors what size are they and what brand?

 

holley 42lbs