I cant seem to find much on this. Lets say you put a turbo on. You dont drive any differently than normal just more "pep" for passing people and merging.

Does a turbo increase/decrease/stay the same for fuel economy?

I read some info a turbo helps some on gas engines but more for diesels.

 

You'll lose some gas milage when your inboost and you'll gain a little when out of boost like cruising on the highway at partial throttle but overall I think it stays about the same. I have lost about 1 mpg since being boosted. Keep in mind this is all assuming you get agood tune and are running proper fuel management.

 

So do I have to use a higher octane gas or regular 89. I have been told this on things with motors before and it has never hurt to run cheaper 89 vs the 91 like they want.
Is that what "fuel management" is?

 

Not even close. YOu should get tuned for 93 octane and run 93 octane

 

No other way around it? Would it hurt my motor if I ran 89 octane?
Whats the reason for this. I would love a turbo one day when I get my car payed off to turn it into a sports car ha ha.

 

If you're not going to do it right, don't do it at all....

running higher octane gasmakes the motorless prone to detonation

 

No I agree to do it right.

What is detonation I have heard it said several times.

 

detonation is when your fuel/air mixture ignites earlier than it should effectively trying to force the piston back before it reaches TDC. Usually it means a dead engine really easy really fast. The octane rating tells you how well the fuel resists detonation. The higher the rating the less is the possibility of detonation.

 

and you will make less power

 

Okay thanks for the info. Its something to think about when I do go through with this.