Who tunes partial throttle really well?
David,
Best Economy for Gas is 16.2. As you go leaner, you actually make more power, so you need less throttle. You end up sucking less air and therefore less fuel. But you are correct, leaning out doesn't add that much econ. Maybe 1 mpg. Adding some timing helps too. But one has to be careful to not burn a hole in their pistons at cruise speeds.
Best Economy for Gas is 16.2. As you go leaner, you actually make more power, so you need less throttle. You end up sucking less air and therefore less fuel. But you are correct, leaning out doesn't add that much econ. Maybe 1 mpg. Adding some timing helps too. But one has to be careful to not burn a hole in their pistons at cruise speeds.
People have also reported gains (although small) from a COP setup.
I'm still curious what the difference in mileage would be assuming all other variables the same, of running stock low compression compared to 10:1 compression.
I'd like to compare a built 10:1 motor, running a larger turbo, 4.10 final drive, COP setup, no cat, stock cams, with lean cruise to a stock car with a tune. Gotta be worth at least 2mpg more on the highway minimally.... I just wonder how much the compression effects those results.
I'm still curious what the difference in mileage would be assuming all other variables the same, of running stock low compression compared to 10:1 compression.
I'd like to compare a built 10:1 motor, running a larger turbo, 4.10 final drive, COP setup, no cat, stock cams, with lean cruise to a stock car with a tune. Gotta be worth at least 2mpg more on the highway minimally.... I just wonder how much the compression effects those results.
Sparktech had the only true upgrade for the X for ignition but have since stopped selling it and are working on it still.
Otherwise the okaka **** is all BS, doesn't do anything...so I would say there isn't really any gains to be had by switching out the stock COP.
Otherwise the okaka **** is all BS, doesn't do anything...so I would say there isn't really any gains to be had by switching out the stock COP.
Evolving Member
Joined: Sep 2008
Posts: 318
Likes: 0
From: Czech rep.
Well, I spent 3 years tuning my Stage2 Evo X for WOT as well as partial throttle. I used only street driving, as we do not have any smart tuner with AWD dyno nearby.
I can say - yes, you can get better mileage: run lean (with WB simulating lambda 1.1 in closed loop), run closed loop under all conditions you usually cruise, set high MIVEC overlap in cruise out of boost, higher timing. You can get some 10-15% better economy.
Two problems:
1) takes hudge amount of time making all the maps working fine together and megabytes (maybe even gigabytes) of data logging and hours and hours of night data analyzing
2) potentional problem with too high EGT, which I unfortunatelly have no way to watch. But looks like it is not that big issue, as I have droven some 40k miles with no sensible wear to the engine.
I can say - yes, you can get better mileage: run lean (with WB simulating lambda 1.1 in closed loop), run closed loop under all conditions you usually cruise, set high MIVEC overlap in cruise out of boost, higher timing. You can get some 10-15% better economy.
Two problems:
1) takes hudge amount of time making all the maps working fine together and megabytes (maybe even gigabytes) of data logging and hours and hours of night data analyzing
2) potentional problem with too high EGT, which I unfortunatelly have no way to watch. But looks like it is not that big issue, as I have droven some 40k miles with no sensible wear to the engine.
I can. I average 21mpg in town, with ocassional boost and stop light drag, and 27mpg all day long on the freeway up to 85 mph average 6000 miles cross country and back, withh full logs, plus photos at each fuel stop, light on, with 366 miles on the trip... to back it up. let me know what you find.
Last edited by Raceghost; Jul 16, 2012 at 01:16 AM.
Evolving Member
Joined: May 2008
Posts: 138
Likes: 0
From: Long Beach, CA
maybe if you read and think before you speak you wouldnt sound like a smart *** with an agenda
we have 3 tuners and most know that... my last name isnt Church... do the math
stop trying to make yourself look good and get back on topic.
if you dont have anything positive or informative to say, i suggest you keep it to yourself
this isnt the first time you peaked your head in on one of my reponses and came off as a smart ***....
again, back on topic.
we have 3 tuners and most know that... my last name isnt Church... do the math
stop trying to make yourself look good and get back on topic.
if you dont have anything positive or informative to say, i suggest you keep it to yourself
this isnt the first time you peaked your head in on one of my reponses and came off as a smart ***....
again, back on topic.
Evolving Member
Joined: May 2008
Posts: 138
Likes: 0
From: Long Beach, CA
Not defensive at all are we? haha
Still 5 cars a day, EVERY DAY, seven days a week, 365 days doing basic math. Even three tuners all tuning full time every day makes this a stretch.
Again, people aren't idiots on here.
Still 5 cars a day, EVERY DAY, seven days a week, 365 days doing basic math. Even three tuners all tuning full time every day makes this a stretch.
Again, people aren't idiots on here.
Evolving Member
Joined: May 2008
Posts: 138
Likes: 0
From: Long Beach, CA
true, ive seen best results at 16.2,
but have dialed it back to 15.8 till i get an egt there
but have dialed it back to 15.8 till i get an egt there
David,
Best Economy for Gas is 16.2. As you go leaner, you actually make more power, so you need less throttle. You end up sucking less air and therefore less fuel. But you are correct, leaning out doesn't add that much econ. Maybe 1 mpg. Adding some timing helps too. But one has to be careful to not burn a hole in their pistons at cruise speeds.
Best Economy for Gas is 16.2. As you go leaner, you actually make more power, so you need less throttle. You end up sucking less air and therefore less fuel. But you are correct, leaning out doesn't add that much econ. Maybe 1 mpg. Adding some timing helps too. But one has to be careful to not burn a hole in their pistons at cruise speeds.
Evolving Member
Joined: May 2008
Posts: 138
Likes: 0
From: Long Beach, CA
not at all, just stating how it is, and fyi, 6 days a week
my question is why are you stuck on this rather that talk about the subject at hand? lol
i would go into more detail to refute your calculated claim, but no need to and not the right forum... this is about part throttle, not dyno head counts... i just threw that in there on one of my previous post as a credential of my knowledge or experience so to speak, not a promotion of service.
as you may know, we dont promote or advertise anywhere unlike most shops, becuase we dont need to.
my question is why are you stuck on this rather that talk about the subject at hand? lol
i would go into more detail to refute your calculated claim, but no need to and not the right forum... this is about part throttle, not dyno head counts... i just threw that in there on one of my previous post as a credential of my knowledge or experience so to speak, not a promotion of service.
as you may know, we dont promote or advertise anywhere unlike most shops, becuase we dont need to.
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