All about 3.6 Pentastar injector upgrade:
With our Jeep engine out for replacement, we figured it'd be a good time to upgrade the injectors. The 3.6 pentastar fuel injector upgrade consisted of these 8-hole injectors from the newer Pentastar 3.6 PUG engine P/N: 05281427AA. They should theoretically improve atomization, and therefore improve fuel economy, reduce misfires, and produce better off-idle tip-in response. Turns out these come with new O-rings too, which is nice.
Another nice thing is how this fuel injector upgrade drops right in place of the stock injectors without any trouble or modification at all, as can be seen below:
Why we went with these for our 3.6 Pentastar injector upgrade:
The decision to run this particular fuel injector upgrade came after reading all we could find about available 3.6 Pentastar injectors on various forums and Facebook groups. As it turns out, those who've installed these are reporting a 0.5-1.5ish MPG gain in a JK and as much as 3 MPG in a Charger. Having just installed an upgraded intake manifold, Banks Intake, Magnaflow Overland exhaust, and 8-speed auto in our JK Rubicon, our data may not be as apples-to-apples, but we'll see how it all stacks up as we pile the miles on.
How we like the upgraded injectors so far:
So far, our Jeep runs smoother than it has since we bought it. Check back here in the future as we'll add more on how they're behaving, and what changes, if any, we see in mileage/range. Also, check out the upgraded intake manifold and aluminum oil filter housing we added while the Jeep was apart!