wickmyster Posted November 1, 2011 Share Posted November 1, 2011 I am just wondering what I should turn my boost down to in my jza70 supra (Auto atm ..) to get it running as economically as possible saving gas and fines I am going to get an electronic boost controller with a switch to flick between standard boost and low boost, so I have the power when want it. Is there a formula to follow, I want my boost setting to equal about a N/A with 11:1 compression ratio, so to make about 200ph down from the 280+ It is my everyday driver, and being an auto, it is hard to stop it coming into boost. So please no comments about self control. Quote Link to comment Share on other sites More sharing options...
Yowzer Posted November 1, 2011 Share Posted November 1, 2011 I think even with electronic control there is a minimum that you can actually turn the boost down before you are relying only on the wastegate spring tension. Usually this is around the 5-7PSI mark, and then increasing the boost from there involves the solenoid bypassing / bleeding off air to the wastegate actuator. So unplug the solenoid and see what it boosts at? I might be wrong though. Have had jack all dealings with modern turbo engines. Quote Link to comment Share on other sites More sharing options...
Spencer Posted November 1, 2011 Share Posted November 1, 2011 the boost on these is purely controlled by the tiny gates and the super restrictive down pipe, no EBC will make the boost any lower at wot, wind the boost up and enjoy your JZ powered whale Quote Link to comment Share on other sites More sharing options...
KKtrips Posted November 1, 2011 Share Posted November 1, 2011 Drill a hole through the floor under the gas pedal and put a bolt through it. That'll fix it good Quote Link to comment Share on other sites More sharing options...
kpr Posted November 1, 2011 Share Posted November 1, 2011 i had written a reply but the above is far better Quote Link to comment Share on other sites More sharing options...
Shandangles Posted November 1, 2011 Share Posted November 1, 2011 get a more economical car / more self control / man the fuck up.... Quote Link to comment Share on other sites More sharing options...
JoKer Posted November 1, 2011 Share Posted November 1, 2011 yowser pinned it thats what I do when towing trailer (wastegate pressure) avoids high load/pinkings Quote Link to comment Share on other sites More sharing options...
Spencer Posted November 1, 2011 Share Posted November 1, 2011 So just wire tie the gates open basically, it will still have shit economy Quote Link to comment Share on other sites More sharing options...
keltik Posted November 1, 2011 Share Posted November 1, 2011 Technically speaking you'd be getting better efficiency with everything working normally and just driving the car correctly. Quote Link to comment Share on other sites More sharing options...
Testament Posted November 2, 2011 Share Posted November 2, 2011 Drill a hole through the floor under the gas pedal and put a bolt through it.That'll fix it good This slash driving style. more power boost etc. does not neccesarily = terrible fuel economy. because you have plenty of power you only need to apply it in short steady bursts to go up hills and the like and can coast alot more than a vehicle of the same weight but with a less powerful engine. basically if driven smoothly with as little and as smooth throttle appication as possible fuel use is more mostly proportional to load, i.e. weight and drag (aero) rather than engine size/power/turbos. so take any heavy stuff out of your car that you can and drive slower. if your using full throttle a bunch at 5psi or 10psi your going to use a heap of fuel in either case, as at 5psi your going to be on the throttle longer. Quote Link to comment Share on other sites More sharing options...
cubastreet Posted November 2, 2011 Share Posted November 2, 2011 cut 2 coils from front struts jam under accelerator win/win Quote Link to comment Share on other sites More sharing options...
Roman Posted November 2, 2011 Share Posted November 2, 2011 The bulk of your fuel consumption is going to be determined by your low rpm, low load efficiency of the engine. Altering the boost settings changes the mid/high rpm, high load operation of engine operation. It's like buying padded running shoes so you dont get sore feet while sitting on the couch. Quote Link to comment Share on other sites More sharing options...
fuel Posted November 2, 2011 Share Posted November 2, 2011 I just wouldn't expect great fuel economy out of an auto JZA70 full stop.. go buy a $1000 daihatsu or something to run around town in. Quote Link to comment Share on other sites More sharing options...
Yowzer Posted November 2, 2011 Share Posted November 2, 2011 Yah decreasing poost will do nothing to the engines efficiency. All you are doing is limiting its power. However if you were to also up the compression and tweak the fuelling you could potentially increase its efficiency and make it more economical. But that's not really feasible. Quote Link to comment Share on other sites More sharing options...
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