Economy Tuning, Afrs, Timing Etc

[Kinks]

I don't think I've ever seen great consumption out of any R series Skyline

My stockish R33 did 9.3L/100km on the freeway. I made it 598km on a tank before I chickened out and filled up (56 litres), the only reason being I was between country towns and I wasn't sure if I'd make the next one on what I had left.

Last 2 tanks on the R34 with Adaptronic I think I averaged 11L/100km driving over the blue mountains and back, and some mixed city driving. That's not too bad, especially considering the elevation change. Before that it was around 14L/100km around town, pretty bad.. but I think I am "driving around" a droney exhaust which makes me boot it to get through the droney point and then sit in a lower gear doing higher RPMs that are not fuel efficient.

[GTSBoy]

I typically get flat 12s in R32 w/ Neo25DET in just heavy traffic commute driving. It should dip below 10s easily on a highway drive.

[zebra]

yep. id get over 600ks to a tank in my old one highway cruising

[zoomzoom]

I think my engine tune is similar to above then. The stagea has the added disadvantages of being auto, 4WD and has a the aerodynamics of a baleen whale at the front. Ive now added as much timing as I feel comfortable with. I haven't spotted any problems listening to the knock sensor or looking at knock readings. Without dyno time, I dont think I can do more accurate tuning. Since my tune needed quite a lot of fixing after coming back from a reputable tuner, I don't think I trust anyone but myself.

[Trex]

Comes down to driving conditions too. I used to get 12l/100 in the Stagea because I was able to let it heat up at my own leisure before hitting traffic. I've noticed a huge drop in Econ because of my new home and work location.

[Dose Pipe Sutututu]

Wheel alignment and sticky tyres also has an effect on economy. Driving to Wakefield Park with R compound tyres and 1mm toe out at front really chews up fue, on normal tyres I'm able to get there on about 30L of fuel on E85. On semi slicks it chews up about 40L LOL

[XGTRX]

It would be nice to log EGTs as well which would give you a better idea of the situation. Better to measure the happiness of the engine than just listening to it. You could also get it right in a short time. You might not realise you are running too lean until you reduce airflow, then a slight increase in intake temps may be enough to detonate a hot chamber when you are in low speed traffic and your intake temps aren't high enough to retard timing . Hope I make sense.