Originally Posted by bubbabud

It seems to me that with the money spent on upgrades by Astella1 You could have just specked a more powerful engine to start.

Originally Posted by astella1

I recently put 20" rims with 305/50 tires. They were a closeout and they look sharp, but the impact on my mileage has been huge. I also only drive two miles to work in suburbia. So lately all I can do is 14mpg which isn't really good. When I get on the highway it starts going up slowly. I think it would top out at 19-20. Now, with the original configuration and stock tires and rims I was getting 17 around town and 21-22 on long highway runs. I also forgot to say that the E85 in the tank drops the mileage so that 14 is low also due to that. It should be 16 on regular gas. I havn't had a lot of the time with the SCT tuner thing and have not been able to try the custom mileage tunes yet. They are special tunes made to get you higher MPGs. I hope to use them on future trips. Right now I am using the performance/tow E85 94 octane tune. Oh, here is an image of the exhaust tips straight out the back and the rims/tires.

Originally Posted by bubbabud

2.7 good call I own one could not be more pleased with the little engine that can and does.

Originally Posted by AutoAnything

As others have mentioned, there really isn't a whole lot you can do to really squeeze a ton of power out of most modern naturally aspirated motors these days, but collectively these things definitely do add up. The problem then is of course that you've got to spend quite a bit to get relatively little out of these engines, especially when compared to the massive gains guys can get with a just a cheap-ish tune on the EcoBoost motors.

If/when you do decide to go down that route, though, definitely PM me. I can get you a pretty good price on that BBK 73mm throttle body and various exhausts and intakes.

I'll send you a quote if you're curious.

Originally Posted by Biggie79

I have the 3.7 as well and have added five star 87 performance tune, roush intake, jba shorty headers, magna flow oem y pipes with new cats, vibrant performance resonator and 3" mbrp pre axle cat back exhaust. I definitely felt a increase down low and the over all truck is much better around town. acceleration is much improved over since i've added new wheels and tires. tires are 33". truck felt like a dog after the wheel and tire upgrade, along with the front and rear bumpers as well. Having the rear end swapped out to 4.10 next month which will help even more!

Originally Posted by MPETE

SWEET. I am sure 7 years later this post helps out OP. 😂

Originally Posted by Cameron Kelson

Anyone out there done any performance upgrades to their 3.7? I just got one this week, and while I like most aspects of the truck, the engine is certainly underwhelming. It's still pretty impressive in the higher RPMs, but man it's tough without that low-end torque. So I was wondering who on here has tried to add a little oomph to their truck? I've thought about a CAI, but I hear that the factory air box is already pretty darn good, so I might just get a K&N drop-in filter. But apart from that, anyone tried throttle bodies, exhausts, etc.? I know quite a few people have tuned their 3.7s, what has their experience been? I don't want to compromise reliability or put excess strain on the engine, because I'm hoping for this truck to last me a nice long time.

Any info is much appreciated!