So i've had the 60 pound injectors in my car for a while now. I'm curious though what people are getting for gas mileage with the 60's. I know what my computer is showing me is in the mid 30s is wrong. Cause I'm averaging only 250 miles a tank. Which sucks i was getting 350 with the 42s. Just curious what people are getting out there. If its bout the same as me ill be going back up to the 42s and 2.8 inch pully. Extra power aint worth 100 miles on a tank to me.

 

I was getting 38-40MPG at 80mph on the highway on the last road trip I went on. That was when I had my 2.6" pulley on my stock blower. It's all in the tuning.

 

Yea i figured that its my tune.

 

well if you think about it man, it is going to depend on your tune. if you put all those mods in your car to get such great power and never tune it, your going to do more harm than good.

tuning your car (the right way) is really good for your car.

you also know that with every mod you do, you actually do bump that gas MPG thingie in the **** hole with the more mods you do. ;]

so if your more concerned with your MPG and your 350 mile road trips, stop modding now.

 

i have 60's and a 2.7'' pulley and i get about 33 on the highway and about 24-26 overall

 

If you have 60lbs, trust me gas mileage should b the last thing on your mind..hahahahaha

 

eh ill prolly go back up to the 42s then. the one additional pound of boost aint worth it. its my daily driver so gas mileage does play into it. its been tuned. could use some fine adjustments though

 

uhh injectors and pulley size shouldnt have an effect if your driving normally. The more you beat on the car the more gas you use. but while driving at say 2500 RPMS your car with a proper tune should be using the same amount of fuel with 60lbs as it would with 36 lb injectors.

 

All lies!! (Kidding).

 

Care to explain?

 

im getting better gas mileage with the 60's than i did with the 42's

why?
i tinker a lot

 

see thats why i figured i should mess round a little with the tune.

 

This is how I understand it and I know there are some that disagree but it explains increased gas mileage while upgrading.

Example: You have a 2.6" pulley for performance reasons ... your at 2500rpm and not using the sc'er ... you are not using more gas so your gas mileage doesn't change.

You have an intake and full exhaust you just made your car more effecient across the board so you would not lose gas mileage unless you slam the gas.

You added larger injectors and tuned them well so that the car is stable with a good afr, if done correctly you should see no difference here as well again unless you get on it.

In some cases you actually gain mpg because of the effeciency that the car has been made to operate under. For instance at 2500rpm the car can make so much power stock. When you modify the car properly you will be making that same amount of power sooner and the car will run more effeciently effectively broadening the operating range of the car producing smoother quicker acceleration at lower rpm's requiring less work for the car for the same operation. For road trips because of the cars increased effeciency you can maintain the same speed with less gas since you can produce more power with less requirment making the car more consistant with its automatic cruise.

 

Idk ill figure something out. My cobalts coming off the road before winter hits. Gonna have a ported supercharger and head come spring. So ill need it tuned then anyways.

 

the injectors still fire the same amount of fuel at part throttle.

you could have 32 lb injectors, or 160's to maintain that 14.7 +/- a few it's going to require the same amount of fuel.

wide open is a different story

 

i think its my tune. cause ik im too rich under 3k rpms. so ill try tuning it and see what that does. thanks everyone for the advice.