95burgundyesi
15+ Year Contributor
- 816
- 9
- Feb 8, 2006
-
Rockford,
Illinois
My set up is in my page but this is the basic run down -denso 720's,hx35,sbr fmic,walbro 255, 22-23psi
For some reason I am running lean up top. Based on my AEM wideband I am running a 11.1-11.4:1 A/f ratio at 5k and below ina WOT 3rd gear pull. Then it starts creeping to about 12.5 above that. And Link says 5300rpm I get 2 degrees of knock all the way to 7.8 degrees by 6200rpms. I replaced the timing to where there is like none and now its super slow but thats all I can for now.
Spool is fine and is flowing 43lbs/min at 22 psi on 780s but the injector duty cycle up top is at like 110%. With 1000cc injectors in it got lower but still it too high. I should not be maxing these thigns out at that psi. So I already threw in 1000s and it didn't really help. The fuel filter is one yer old and always just ran pump through it. The lines were checked for kinks and I see nothing bent or out of place, dont see any leaks in the system either. Also, I changed out fpr with 2 stock ones and I got them same results. The walbro 255 is not rewired and should be fine at this level.
I have no idea what would be causing me to go lean up top and max out 1000cc injectors like this. I have pulled all the timing away to help it not knock, and I don't know what else to try. I checked for boost leaks and everyting seemed okay, I am going to redo it tomorrow morning.
Any ideas pop out? like a bad MAS or something? cruise and daily driving, it runs fine, I just don't get it.
For some reason I am running lean up top. Based on my AEM wideband I am running a 11.1-11.4:1 A/f ratio at 5k and below ina WOT 3rd gear pull. Then it starts creeping to about 12.5 above that. And Link says 5300rpm I get 2 degrees of knock all the way to 7.8 degrees by 6200rpms. I replaced the timing to where there is like none and now its super slow but thats all I can for now.
Spool is fine and is flowing 43lbs/min at 22 psi on 780s but the injector duty cycle up top is at like 110%. With 1000cc injectors in it got lower but still it too high. I should not be maxing these thigns out at that psi. So I already threw in 1000s and it didn't really help. The fuel filter is one yer old and always just ran pump through it. The lines were checked for kinks and I see nothing bent or out of place, dont see any leaks in the system either. Also, I changed out fpr with 2 stock ones and I got them same results. The walbro 255 is not rewired and should be fine at this level.
I have no idea what would be causing me to go lean up top and max out 1000cc injectors like this. I have pulled all the timing away to help it not knock, and I don't know what else to try. I checked for boost leaks and everyting seemed okay, I am going to redo it tomorrow morning.
Any ideas pop out? like a bad MAS or something? cruise and daily driving, it runs fine, I just don't get it.
