89 with a lean condition

[ranton]

ok need a little advice here, this is my set up i am running a 302 with gt40 heads 1.6 roller rockers and crane valve springs, gt40 upper and lower intake
trickflow stage one cam 24lb injectors 255lb fuel pump, powerdyne 6lb kit. "no fmu" adjustable fuel pressure regulator. accufab 70mm throttle body when the car was built we put it on the dyno it pulled 405rwhp but was leaning way out. my quastion is why and what can do to fix this issue with useing a t-rex....i have many other cars with almost the same setup with no fuel problems.

thanks
rich

 

[DropTopR]

Is the fpr a boost sensetive one? Cuz I've known of people using a boost sensitive fpr without the fmu, and working good. Otherwise, that could be causing the lean condition, if it is only vacuum responsive.

 

[ranton]

i have the boost sensative one i remebr the guy at the shop stressing that and as a matter of fact we actually used it to kinda fix the problem. but i still have the issue.

 

[DropTopR]

Have you tried maybe electronically tuning the car to get rid of it?

 

[Grn92LX]

You run 24lb injectors with no fmu are you wonder why its lean?? You NEED 42's and then a tune.