Hi,
Have HDJ80 for 8 years looked after like an only child. Have monitored EGT readings over past six years.
Had a pump rebuild a while back with no 'on car' tuning so it's stock. CompAred to previous tunes it is gutless but I want to do it myself this time. Have read everything I can get my hands on. It's got nothing off the line. Ok once ~5psi boost comes in but still slow to what it can be.
Has 3inch exhaust and I have rotated aneroid pin to maximum profile, but it wasn't far off this position. Off boost screw was in maximum when it came back from pump rebuild. Have left star wheel for interim.
AFR is above 99:1 at idle and only 24:1 at full load I.e. Fifth or 4th gear WOT up hill 100km/h. I have seen a quick dip towards 21 from memory for a split Devine at 3000rpm in 3rd.
Running stock 11psi at manifold.
Pyro is post turbo. I drive to keep it below 500 with alarm on 550 and off 500. It's a heavy rig, but I usually see ~400 -450 at 100km/h on flat in 30 degree weather. Hit the alarm overtaking and up hills easily - probably worse on the lean tune this power tune!
Want to aim for 20:1 to begin with. My theory is to get this reading is to set main screw 1/4 turn in ir about 1.5cc I think and go from there. Leave aneroid adjustment to end to eliminate smoke or add more low boost fuel if smoke allows.
Generally high EGT for me or 'high risk driving' is at 100km/h so I tend to think AFR and EGT at 4th/5th 2200 - 3200 is important.
Main two questions:
1) what rpm/gear is best for AFR test?
2) will 1/4 turn be good starting point?
I KNOW this engine can make great power. Have experienced it. Just want it back safely and bit happy with answers it questions Bout EGT Abe AFR from 'tuners' I have called.
Injectors Are in good order - 80 000km since reco. Good fuel and filters always used.
Have HDJ80 for 8 years looked after like an only child. Have monitored EGT readings over past six years.
Had a pump rebuild a while back with no 'on car' tuning so it's stock. CompAred to previous tunes it is gutless but I want to do it myself this time. Have read everything I can get my hands on. It's got nothing off the line. Ok once ~5psi boost comes in but still slow to what it can be.
Has 3inch exhaust and I have rotated aneroid pin to maximum profile, but it wasn't far off this position. Off boost screw was in maximum when it came back from pump rebuild. Have left star wheel for interim.
AFR is above 99:1 at idle and only 24:1 at full load I.e. Fifth or 4th gear WOT up hill 100km/h. I have seen a quick dip towards 21 from memory for a split Devine at 3000rpm in 3rd.
Running stock 11psi at manifold.
Pyro is post turbo. I drive to keep it below 500 with alarm on 550 and off 500. It's a heavy rig, but I usually see ~400 -450 at 100km/h on flat in 30 degree weather. Hit the alarm overtaking and up hills easily - probably worse on the lean tune this power tune!
Want to aim for 20:1 to begin with. My theory is to get this reading is to set main screw 1/4 turn in ir about 1.5cc I think and go from there. Leave aneroid adjustment to end to eliminate smoke or add more low boost fuel if smoke allows.
Generally high EGT for me or 'high risk driving' is at 100km/h so I tend to think AFR and EGT at 4th/5th 2200 - 3200 is important.
Main two questions:
1) what rpm/gear is best for AFR test?
2) will 1/4 turn be good starting point?
I KNOW this engine can make great power. Have experienced it. Just want it back safely and bit happy with answers it questions Bout EGT Abe AFR from 'tuners' I have called.
Injectors Are in good order - 80 000km since reco. Good fuel and filters always used.