Ben C34 Posted November 13, 2013 Share Posted November 13, 2013 Install a wideband o2 and see what your car is doing. I've seen lazy tuners who don't even care too much about off boost injection maps and just rely purely on o2 closed loop to work out the mixtures. The thing is you could be hitting stoich no worries but retarded timing will need larger throttle openings, hence worse consumption. its not enough to have a stoich ratio. Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7106301 Share on other sites More sharing options...
xaqshn Posted March 16, 2014 Share Posted March 16, 2014 My34gtt gets 450 to 550 km a tank and that's running all stock.. Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7229412 Share on other sites More sharing options...
TTR34 Posted March 17, 2014 Share Posted March 17, 2014 Had my worked R34 GTT retuned and still only get 250km to the tank... thinking of changing ECU from Power FC to get better fuel economy. Pretty sure the Rb25 is meant to be the most fuel efficient 6 cyl produced... Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7230072 Share on other sites More sharing options...
Dose Pipe Sutututu Posted March 17, 2014 Share Posted March 17, 2014 Had my worked R34 GTT retuned and still only get 250km to the tank... thinking of changing ECU from Power FC to get better fuel economy. Pretty sure the Rb25 is meant to be the most fuel efficient 6 cyl produced... I ran a PowerFC on my old R33, consistently got 430~450km and would do easily 550+ km on the highway. I had it ran in closed loop, used the narrowband simulation of an Innovate LC-1 and had a bit more timing in cruise than the stock map (cruise area that is). Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7230078 Share on other sites More sharing options...
Ben C34 Posted March 17, 2014 Share Posted March 17, 2014 Had my worked R34 GTT retuned and still only get 250km to the tank... thinking of changing ECU from Power FC to get better fuel economy. Pretty sure the Rb25 is meant to be the most fuel efficient 6 cyl produced... That's terrible economy. I would be questioning the tuner on that one,unless you drive like a mental case everywhere. Where did you hear that the rb is the most efficient 6 cylinder? That doesn't sound right! Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7230094 Share on other sites More sharing options...
V28VX37 Posted March 17, 2014 Share Posted March 17, 2014 My economy improved after full exhaust, FMIC and Nistune with a proper dyno tune - go figure. Also 'kms to a tank' is not a realiable measure of economy, I always recommend calculating l/100km, it's easy enough to do. For some 'over time' averages check this thread: http://www.skylinesaustralia.com/forums/topic/436056-fuel-economy-for-250rwkw/ Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7230282 Share on other sites More sharing options...
mad082 Posted March 17, 2014 Share Posted March 17, 2014 Had my worked R34 GTT retuned and still only get 250km to the tank... thinking of changing ECU from Power FC to get better fuel economy. Pretty sure the Rb25 is meant to be the most fuel efficient 6 cyl produced... How many litres are you calling a tank? My current car has a 50l tank and the needle is nearly on empty after 30l of fuel used. Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7230384 Share on other sites More sharing options...
zoomzoom Posted March 17, 2014 Share Posted March 17, 2014 Also 'kms to a tank' is not a realiable measure of economy, I always recommend calculating l/100km, it's easy enough to do. That's an understatement. In these kinds of threads, its not uncommon to see claims of >25L/100kms based on the "x kms to a tank" lingo. Which is around the consumption of turbo bentleys, v12 lambos and ferraris. Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7230458 Share on other sites More sharing options...
V28VX37 Posted March 17, 2014 Share Posted March 17, 2014 That's an understatement. In these kinds of threads, its not uncommon to see claims of >25L/100kms based on the "x kms to a tank" lingo. Which is around the consumption of turbo bentleys, v12 lambos and ferraris. Haha, indeed. That said, my previous V8 actually drank 25 l/100km in stop-start around town, now that's economy... Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7230466 Share on other sites More sharing options...
shubby0901 Posted November 9, 2014 Share Posted November 9, 2014 (edited) I recently bought a R33 GTST which is stock. I get about 250kms on 3/4 tank (roughly 40L). I dont actually wait for the light as I dont know how far the car will go haha... edit: roughly Edited November 9, 2014 by shubby0901 Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7422502 Share on other sites More sharing options...
Hadouken Posted November 9, 2014 Share Posted November 9, 2014 I drive like my car is stolen. Full boost everywhere e85 average 12-15l /100km on the track it drinks 17l/100km Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7422535 Share on other sites More sharing options...
Hadouken Posted November 9, 2014 Share Posted November 9, 2014 Btw that would equate to about 400-450 km to a tank. And I mean a full tank. All 65 litres gone Link to comment https://www.sau.com.au/forums/topic/434493-r34-gtt-chewing-up-petrol/page/3/#findComment-7422536 Share on other sites More sharing options...
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