MPG with the GMPP Turbo Upgrade
03-19-2011, 05:27 PM
#31
Senior Member
Join Date: 01-13-2008
Location: Washington State, where it rains
Posts: 4,708
As far as intown milage...experiment with the DIC and I gear for you auto guys..you might be surprised...this eng does not like to be lugged, even though it shows no signs of it...
03-19-2011, 08:17 PM
#32
Senior Member
Join Date: 01-04-2010
Location: Imported from Detroit
Posts: 1,584
Guys getting 25-30 mpg with the stage kit . 
I see 21+ in the winter cold using remote start and in the summer I see 23-24 MPG summer in town. I have one short blast for 3 miles on the freeway and I hammer it on the on ramps.
Now regular highway I see 31-32 MPG. Note I am not playing the reset game at every take. I let this go over several weeks and a refill each week. If you play with is you can fudge the numbers if you like.
The fact is the a GM engineer has confirmed that the GMTU will increase MPG 1-2 MPG as they have done the same in testing.
Note the largest gains in MPG with the Turbo engine is letting off the gas. Every time you are off gas on the Direct Injection engine no fuel feeds the engine. Coasting in neutral does not shut the gas off. You need to remain in gear and coast up to lights etc. This will make major gains in MPG.
The turbo upgrade with higher boost will move the car to a higher speed faster and you will get off the gas sooner. This is how the GM engineer explained may there is an increase.
Now regular highway I see 31-32 MPG. Note I am not playing the reset game at every take. I let this go over several weeks and a refill each week. If you play with is you can fudge the numbers if you like.
The fact is the a GM engineer has confirmed that the GMTU will increase MPG 1-2 MPG as they have done the same in testing.
Note the largest gains in MPG with the Turbo engine is letting off the gas. Every time you are off gas on the Direct Injection engine no fuel feeds the engine. Coasting in neutral does not shut the gas off. You need to remain in gear and coast up to lights etc. This will make major gains in MPG.
The turbo upgrade with higher boost will move the car to a higher speed faster and you will get off the gas sooner. This is how the GM engineer explained may there is an increase.
Can't really tell you what I do in the summer... remember my whole motor thing last summer... first half of summer = old motor. New motor in end of sep. Then break in.
03-23-2011, 11:21 AM
#34
Senior Member
Join Date: 01-04-2010
Location: Imported from Detroit
Posts: 1,584
They don't mix more ethanol, that is regulated to 10%. If equipped at the truck rack, they could be doing butane injection, or possibly butane injection into the large above ground tank at the tank farm. Depends on the setup at the facility.
The winter gas also has a higher RVP. Right now, the refineries are turning their tanks for the spring season of RVP.
The winter gas also has a higher RVP. Right now, the refineries are turning their tanks for the spring season of RVP.
Thread
Thread Starter
Forum
Replies
Last Post