jporter12 Posted April 7, 2011 Report Share Posted April 7, 2011 I don't fully expect to get a crap load better mileage from a LS2 SS. Not sure that a full tune on a completely stock setup will return much at the pump.You'd be surprised, I'm sure! Quote Link to comment Share on other sites More sharing options...
chevysoldier Posted April 7, 2011 Report Share Posted April 7, 2011 When I was driving my 91 Toyota Tercel, I'd hypermile it. It was a stick shift so I could pop it out of gear, turn off the car and coast for a while. A few spots I know of I could coast for 2-3 miles. Then just start it using the clutch, no wear on the starter. 45-50 mpg. Quote Link to comment Share on other sites More sharing options...
ross Posted April 7, 2011 Report Share Posted April 7, 2011 When I was driving my 91 Toyota Tercel, I'd hypermile it. It was a stick shift so I could pop it out of gear, turn off the car and coast for a while. A few spots I know of I could coast for 2-3 miles. Then just start it using the clutch, no wear on the starter. 45-50 mpg.Shittygsxr and I discuss this sometimes. Also referred to as "coast and burn" i believe. I've seen 27mpg on the highway from this in my trailblazer Quote Link to comment Share on other sites More sharing options...
r1crusher Posted April 7, 2011 Report Share Posted April 7, 2011 You'd be surprised, I'm sure!I'm sure it could be tuned really lean but I'd wind up paying a performance price for it somewhere in the powerband. Quote Link to comment Share on other sites More sharing options...
Steve Butters Posted April 7, 2011 Report Share Posted April 7, 2011 Shittygsxr and I discuss this sometimes. Also referred to as "coast and burn" i believe. I've seen 27mpg on the highway from this in my trailblazerusually i just find a big hill and start going down it for momentum...once im rolling i put my truck in N and shut it off once i near the bottom the hill, i hop out of my truck and i run behind it and start pushing it.....the extra momentum gained from the hill is enough for me to get a steady 2mph roll pushing everywhere i need to go from then oni average about 3,750 mpg doing it this way.....and thats with a diesel truck - eat your hearts out prius-fuckers Quote Link to comment Share on other sites More sharing options...
buildit Posted April 7, 2011 Report Share Posted April 7, 2011 Here's my car, it has gas problems but not the type you think. 1 Quote Link to comment Share on other sites More sharing options...
DTM Brian Posted April 7, 2011 Report Share Posted April 7, 2011 I'm sure it could be tuned really lean but I'd wind up paying a performance price for it somewhere in the powerband.Negative Ghost Rider Quote Link to comment Share on other sites More sharing options...
Steve Butters Posted April 7, 2011 Report Share Posted April 7, 2011 Here's my car, it has gas problems but not the type you think. Quote Link to comment Share on other sites More sharing options...
Das Borgen Posted April 7, 2011 Report Share Posted April 7, 2011 oxygen sensor in good shape, OP?get it dynoed to see what your AFRs are.....13MPG is pretty low Quote Link to comment Share on other sites More sharing options...
swingset Posted April 7, 2011 Report Share Posted April 7, 2011 A ton of stuff on your rig is just useless weight. Get it all off there, and your mileage will increase. I suggest a chop saw and a good day's time. It'll feel like your motorcycle in a way. Think of it as a 4-wheel Can-Am that can pull shit. 1 Quote Link to comment Share on other sites More sharing options...
Steve Butters Posted April 7, 2011 Report Share Posted April 7, 2011 he isnt buckled up.... Quote Link to comment Share on other sites More sharing options...
ReconRat Posted April 8, 2011 Report Share Posted April 8, 2011 It's possible to get 30mpg from a chevy small block. But the harder you try, the more it costs in mods. Basically it's making improvements to the torque output. A real nice hot spark, headers with a big bore single exhaust, edelbrock manifold... you know, stuff...oh and a very good air filter. Maximum air flow at all times.I second checking the oxygen sensor. If it's old, big improvement replacing it.edit: I've actually gotten a small improvement just re packing the wheel bearings... Quote Link to comment Share on other sites More sharing options...
Gump Posted April 8, 2011 Report Share Posted April 8, 2011 Sell it while you can Bubby or deal with it. You'll waste more time and money trying to tune than it's worth. Quote Link to comment Share on other sites More sharing options...
max power Posted April 8, 2011 Author Report Share Posted April 8, 2011 oxygen sensor in good shape, OP?get it dynoed to see what your AFRs are.....13MPG is pretty lowNot sure. It doesn't have any dummy lights on, so I would assume they are ok, but who knows. Quote Link to comment Share on other sites More sharing options...
dugan n rita Posted April 8, 2011 Report Share Posted April 8, 2011 Have ya tried shakin the fords out of the air-filter? Quote Link to comment Share on other sites More sharing options...
TwiztedRabbit Posted April 8, 2011 Report Share Posted April 8, 2011 Not sure. It doesn't have any dummy lights on, so I would assume they are ok, but who knows.never assume sir... they could be bad or going bad.. it takes a lot of cycles 10+ sometimes weeks for it to kick a CEL(dummy light) same with plugs and whatnot Quote Link to comment Share on other sites More sharing options...
jporter12 Posted April 8, 2011 Report Share Posted April 8, 2011 Not sure. It doesn't have any dummy lights on, so I would assume they are ok, but who knows.The best way I know to test the Os sensor is with a lab scope, to make sure it have lot's of activity, and a fast response. Back in the day, the O2 sensor didn't do squat compared to th eimpact they have on how the vehicle runs these days! Quote Link to comment Share on other sites More sharing options...
dorifto240 Posted April 8, 2011 Report Share Posted April 8, 2011 Bad idea. Lose power breaks and steering while driving?Sent from my iPhone using TapatalkUnless you plan on making a sudden high speed U-turn, what do you need power steering for?Plus there's enough pressure in the brake system to give you one good stop. So don't waste it. Quote Link to comment Share on other sites More sharing options...
dorifto240 Posted April 8, 2011 Report Share Posted April 8, 2011 I'm gonna have to call on this. The aerodynamics of most modern vehicles is optimized for 55-65 MPH. To run 35, you're going to be in town, or lot's of stop and go, which will kill mileage. My 13 yr old Intrepid with 202,000+ on the clock will get close to 30 MPG on the highway, running about 70 MPH. Taking the back roads to work, keeping the speed down around 45, I get more like 23 MPG. As said earlier in the post that I quoted, it IS all about momentum.It has very little to do with aerodynamics, and more to do with how hard the engine is working. Your intrepid gets 30mpg on the freeway at 70 because you're near an optimum gearing. If you were doing 55mph, you'd probably get closer to 40.35mph without having to stop, with the engine in a higher gear means the engine is barely above idle. So it isn't really working, and therefore doesn't need much gas.Shell got 376 mpg with a 1959 OpelThe mileage from the mostly stock four-cylinder came from heating and insulating the fuel line so the gas entered the engine as lean vapor. Then they drove the car on a closed course at a steady 30 mph.Read morehello troll, i see you have found this thread.I forgot that if an opinion on something differs from yours it's automatically wrong.My fault.Guys, can't you see the sarcasm in DORIFTO's post? He was just joking around. You guys are too serious in the mornings. Geesh.Thanks, although the turning off the car thing actually does work. Quote Link to comment Share on other sites More sharing options...
Steve Butters Posted April 8, 2011 Report Share Posted April 8, 2011 I forgot that if an opinion on something differs from yours it's automatically wrong.My fault.i forgive you. not everybody knows the ways of the world as well as i do. ill let you buy me a beer next time were out together. Quote Link to comment Share on other sites More sharing options...
buildit Posted April 8, 2011 Report Share Posted April 8, 2011 I installed a K&N cold air intake in my Ram 2500 5.7 and it boosted the mpg to 14 from 12. Darn truck still gets 14mpg up hill, down hill, city or highway. Lowest I've seen was 8mpg hauling a 22ft camper through back roads in WV up and down hills. I'm just thankful it is not my daily driver. Quote Link to comment Share on other sites More sharing options...
DTM Brian Posted April 8, 2011 Report Share Posted April 8, 2011 If I ever get some free time I will post in detail why I can improve mileage on these LSX powered cars and trucks.I will give you all a hint..."Torque Management" Quote Link to comment Share on other sites More sharing options...
jporter12 Posted April 8, 2011 Report Share Posted April 8, 2011 It has very little to do with aerodynamics, and more to do with how hard the engine is working. Your intrepid gets 30mpg on the freeway at 70 because you're near an optimum gearing. If you were doing 55mph, you'd probably get closer to 40.35mph without having to stop, with the engine in a higher gear means the engine is barely above idle. So it isn't really working, and therefore doesn't need much gas.Shell got 376 mpg with a 1959 OpelI thought we were talking real world though. Most places where the speed limit is 35 MPH, there's not enough distance between stops to to cruise enough to offset to amount of fuel burnt by accelerating to get up to speed.Lower RPM's does not necessarily equal less fuel consumption. If the engine makes a big amount of torque in the lower RPM range, it will. More power doesn't necessarily mean more fuel consumption, either. It's all about combustion efficiency.On aerodynamics. Which is going to make the engine work harder? A van that's practically throwing a brick into the wind, or a sports car that's optimized to cut through the wind. To answer this, while driving down the road, open your window, stick your hand out. Start with the palm vertical to the ground, representing the van, then put it horizontal, parallel to the ground, representing the sports car. Which one makes you exert more force to keep your arm straight? Am I way out in left field on this? Quote Link to comment Share on other sites More sharing options...
dorifto240 Posted April 8, 2011 Report Share Posted April 8, 2011 I thought we were talking real world though. Most places where the speed limit is 35 MPH, there's not enough distance between stops to to cruise enough to offset to amount of fuel burnt by accelerating to get up to speed.Lower RPM's does not necessarily equal less fuel consumption. If the engine makes a big amount of torque in the lower RPM range, it will. More power doesn't necessarily mean more fuel consumption, either. It's all about combustion efficiency.On aerodynamics. Which is going to make the engine work harder? A van that's practically throwing a brick into the wind, or a sports car that's optimized to cut through the wind. To answer this, while driving down the road, open your window, stick your hand out. Start with the palm vertical to the ground, representing the van, then put it horizontal, parallel to the ground, representing the sports car. Which one makes you exert more force to keep your arm straight? Am I way out in left field on this?You're right on the real world, which is why I also suggested areas where you can do 35 without too many stops. Tough, I agree, but doable.Fuel consumption, torque, and power are three very different things, that aren't always related. All I'm saying is that the closer to idle you can keep your car while driving, the more efficient it will be. Especially if you can keep it at a consistent speed, like you've pointed out.At most driving speeds, aerodynamics don't matter. The difference between a van and a car is like the difference between a brick on it's side and a brick standing up. There are a few exceptions (the Honda Insight or late 90s Ford Taurus), but most cars are not really designed to move through the air as efficiently as they could be. Even sports cars are designed to force the car down onto the ground, not move the car smoothly through the air.All I'm saying, is drive the truck 55mph and turn the radio up so you can't hear the angry motorists. Then flip them off when they're filling up at the next gas station... Quote Link to comment Share on other sites More sharing options...
max power Posted April 8, 2011 Author Report Share Posted April 8, 2011 I bought this truck to tow and haul people and gear. Its not readable to hypermile in those situations. I started this thread looking for ideas to get maximum tune without spending hundreds of dollars which defeats the purpose of saving money.I already have $55 in plugs and 8 little 6" long wires are gonna set me back the same. What else can be done without breaking the bank? Quote Link to comment Share on other sites More sharing options...
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