[Daox]

Originally Posted by steve05ram360

for unloaded mpg I'd agree but with the op having a heavy burb and it being so heavy it could benefit while towing.

Here is a thread that shows improvement in the mid range & up. (quick search)
BASSANI - HR exhaust Dynos from Z-Car Garage - MY350Z.COM Forums

No Cooler
http://i41.photobucket.com/albums/e2...n1nocooler.jpg

With cooler
http://i41.photobucket.com/albums/e2...run1cooler.jpg


graph showing the average delta from with & without cooler
http://i41.photobucket.com/albums/e2...oDataplot1.jpg

before & after data collected in the same afternoon with the cooler data being last. Ambient temps started out in the mid 80's and we finished up with the temps in the low 90's. I heat soaked the engine compartment before each set of runs (3 each before & after). All of the raw data is in that photobucket folder although not easy to read.

No offense, but those graphs don't anything about fuel efficiency. They prove you can increase midrange power which we should know is definitely possible. There is no mention of any fuel economy testing, and more midrange power doesn't mean better efficiency.