Bolt ons and gas mileage?
 

Just curious.

Should my milage have gotten better with bolt ons?

I have CAI intake
BBK long tube headers with hi flow cats
MRT 2
Trifecta tune.

And I am driving VERY VERY lightly not full throttle AT ALL... under 2k rpms no matter what (SO SLOW) City driving. But like I said... very very flow start (people on bikes get ahead of me quicker) And city driving is 50 km (or 30 miles an hour) I never drive in traffic hour aswell... mostly stopping at red lights.

And I am getting 18 miles to the gallon... Is this normal with boltons or is something wrong?

did you try to reset the gas mileage meter after all of those modz done?
mines was always at 17-18mpg and then i reset it and it shows me the correct mpg

yes I did.

Idk man. I've had an injen CAi, tune and axle back and was getting great MPGs. I installed bbk long tubes and now MPGs went down the drain. I sent Vince a datalog but he hasn't gotten back to me. Idk what the deal is. Hopefully it's something in the tune. I've checked everything. No CEL

How long ago did you datalog?

I sent my datalog 10 days ago and nothing yet about it.

I remember I sent him a log (this was at the start of the tune craze when everything first came out ) and waited a couple months thinking he was just overloaded...nope he just missed my email

Sent from my DROID RAZR HD using Tapatalk 2

My gas mileage was bad (to me) around 20-21 but once I felt my car re learned everything, I get about 23-24 in the city now. Best I've gotten on the highway was about 30.5 with full bolt ons

30 - 34 Hwy with my bolt ons.

I sent it to him last Saturday, 8 days ago

:word:

I have done 25 mile tests numerous times on the way to work in the morning. Always setting the cruise at 70 MPH. I have seen 30 - 33 + MPG every time.

Man reading all this makes me feel like a complete dick of a driver -_-.. i average 16.2 mpg overall, and only 19 on the highway lol.. I bought the car to enjoy it, it is what it is.

Thing is, you probably drive fast and pull 0-60 a ton

I am driving like a granny just to see the milager I get and I am lucky to get 18 mpg.... something is wrong from the looks of it on my end.

I average 20 aswell... id say mine is 85% highway and 10% local and 5% traffic :(

Car must be running rich as hell, thats all i can come up with. whenever vince gets back to you he can look at the log and lean it out if thats the main problem.

My dad (Who has owned about 20 muscle cars in his 50 year life) said that my car was running REALLY rich. I definitely trust his word.

That being said, I am not too sure but if the car is running rich, and vince took a look at it... would my car LOSE power?

(I am probably thinking wrong but maybe running rich = better performance?.. Correct me if I am wrong... which I probably am...)

If you're running too rich you are losing power but running rich is way better then running lean. You want that perfect mixture of afr to get optimal performance from any vehicle.
I had a SS cobalt before the camaro and I went from sc to turbo and I was on a rich tune for three months. When I get a good tune and leaned her out I gained 70whp lol she was a beast! Don't expect that much gain from a n/a car tho, its just an example.

I dont know if this matters or not... but I did receive catalyst air flow p420/430 engine light codes on my car.... I cleared them and removed them from the engine with trifecta (I cleared them first then went into the menu to make sure they never come back)

Could this be the reason why the car is running rich?

honestly its hard to tell, i would say its all in the tune. timing, afrs and so forth.
before you over think it start by having vince overlook the tune and tell him EVERYTHING thats been going on so he can properly diagnose the problem and then go from there. the big problem is.......... getting in touch with vince.

MAF sensor?

Cleaned maf and vince sent me a new tune.

He said with the trifecta tune I am supposed to use 91+... I have 87 and always have so I might try 91 out!

93 would show best results. i know it can be hard filling up with 93 all the time but once you start modding like this it time for premium. like they say, you gotta play to play.

Hmmm

This made me lol at work....


One question for you guys.... Since the trifecta tune is for performance....

Would "babying" the gas pedal and driving slower be worst for gas milage?

I ask because some people have said that the tune is revolved around the fact that you would want more power... so it wouldn't use as much gas or something...

So vince sent me the new tune, I tuned it... drove about... hmm lets say about 50 miles just to see how it is... all city driving about 1 hour of driving...

Reset the gas milage meters and what not...

its up coming 18.5 miles to the gallon... Not bad.... but taking into the fact that I drove an average of 20 miles an hour.... should say something....

I was driving slower then the buses next to me... everyone was passing me....

Is something wrong? Is there something I can do to increase my milage? Could going to 91 octane bring it up?

Problem is city driving. High RPM' shifts, stop and go traffic. ETC ETC

Get it our on the highway, set the cruise to 70 MPH, reset the DIC, and enjoy the 30+ MPG readings.

I see 30+ on the way into work. And close to 20 on the way home. But Itake a differant route and play a whole lot more on the way home.

60 mph is the optimum speed for mpg. Try driving in that range and see what you get. You should be around 25 or better.

Using lower octane gas is a major problem, to get the most out of the car you need to use better gas. 87-89 burns like crazy and if you drive hard it burns like water in the desert plus the car wont perform at its peak performance. In my ss cobalt I could only use 93 no matter what but I wanted the power so I had to deal with it. If I went any lower than 93 I would get major engine knock and I I raced I could blow the motor.