What kind of cam, heads, headers, exhaust, etc would you suggest for a daily driven Suburban to try and get a few more MPG's out of it?

I am thinking about buying a 2015+ Burb for my wife but I wanted to throw heads and cam in it for gas mileage (and to spin the tires when she's not in it) and probably a new exhaust.

Gas mileage, not just RWHP & TQ. Chevy website says 15 city & 23 hwy which means 11 city and 18 hwy in real life. What could I do to get those MPG's back up 18/19 and 21/22 range?

Chad

 

The MPG they get is actually pretty good if don't speed everywhere. Even adding performance parts will ruin the possible mpg gain if you drive to quickly to be in the ideal rpm range for MPG. The DI engine my uncle has in his 14/15 silverado with a topper gets 21-23 easy on the freeway, very impressed with how well it does compared to my 2012 that only can get 19-21 on good days on the open road.

Swapping heads would be a waste of money if you ask me, the DI heads are a totally different design over the LS heads and flow so good. The cost of those cylinder heads is super expensive and most places only offer a porting service that is somewhat cheap over new heads. Like $900-1,000 for some port work.

Intake, some exhaust and a tune by someone who really understands the DI engines will be a big difference over stock. People can gain a decent amount of power and efficiency if they know what they are doing.

 

My 2015 Tahoe (according to info center) averages 21, with a best of 26mpg. Run 80mph at 1800 rpm helps out a lot. And, it'll spin the tires from a dead stop if you nail it. Very impressed with these motors. Bought it with 3 miles on it, has 106k on it now.

 

My wife has a 16 Suburban and all I've done is a cat back so far. It is pretty impressive for what it is really and I haven't felt the need to do any major mods... it'll do a pretty mean burnout with stabilitrac disabled, she was not impressed but I was. A CAI and tune should do all I'll need for it.

 

throw on a supercharger, exhaust & tune

on a road trip, i got a best of 22.3 avg @ 75-80mph w/ 3.42 gears & the above

 

Thanks gentleman!

Chad