Hey guys, I recently did a Cammed lq9 swap in my rcsb Sierra. The power is great but mpg is not, I am getting roughly 18.5 mpg highway with a 220/228 112lsa camshaft. Do you think my mpg's will improve if I swap the stock cam back in? I know it's a pickup Truck and mpg will never be great but any improvement will help, thank you.

 

a tune would net you more than a cam swap . your going to what ? 212-218 ? this might get you some , but youll lose alot of power

 

What converter do you have?

 

You should go way up on the LSA to bring some power back towards the low end of the RMP scale.

 

Way up on the LSA, to bring power down? What LSA you talking here?

 

lol

 

I'm already tuned by Blackbear performance, I have a stock stall and am thinking about getting a 3200 yank

 

18 highway is prety good

 

To bring the power band down...so that the peak power potential is not in the stratosphere.

 

Decreasing the amount of overlap in the cam will help to make the engine more efficient for daily driving, which the OP was asking about.