WOT Fuel Pressure and O2s

[gnman87]

Hey -- got the in the cockpit FP reg (isolator -- it's very cool) and am learning something about my 87GN and what it's doing under WOT. 36# injectors -- stock (ported elbow) turbo -- 16psi boost with alky at 11psi. Car is only kr .7 and gets on it nicely -- but, then really pulls back. It's not KR (not much on the scanmaster and nothing audible but almost feels like it's being retarded. The line off FP is 42 -- line on 38. 16 pounds of boost and I'm getting 60-61psi fuel pressure. That's going to be 2-3# too much. So, turn up the boost? Turn down the FP? Definitely losing performance. The WOT O2s are consistently 850+. Too rich, right?

thanks!

jp

 

[87GN_70GS]

You have 2 different gauges measuring pressure - fuel and boost. It sounds like measurement error, one is likely off, but which one? Maybe you really have 18-19 pounds of boost, instead of 16 lbs indicated?