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Jeep Wrangler JK V6 Power Adders

Posted in How To: Engine on July 1, 2011 Comment (0)
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We don’t expect you to go digging into your ’07-’11 Jeep’s 3.8L to make major modifications like cam swaps or head porting. Heck, we’ve been told by Jeep engineers (as in the guys who actually build the engines) that the 3.8L isn’t the most durable engine ever and it’s best not to put major power-adders on it like superchargers or turbos. So, what’s the owner of a 3.8L to do? Make the best of what you’ve got, of course. Keep your mods to the bolt-on and plug-in variety, and your 3.8L should serve your Wrangler a long, adequate, vanilla-flavored life.

1. Cold-Air Intake
Like any engine, ditching the restrictive factory air box and ducting and allow ing your engine a huge whack of colder, denser air will improve power and (usually) mileage. Cold air systems are available from a variety of manufactures like Banks, AEM, and K&N to name just a few.
2. Ignition
Again, Upping your spark power so you can open up tour plug gap will imporve low-end drivabillity and torque. Usually there's also bonus top-end power as well. For less than $190, Performance Distributors offers its Firepower kit for the jeep 3.8L, which includes a hotter coil and low-resistance, high-performance plug wires.
3. Electronic Throttle
the Sprint Booster plugs into your electronic throttle and essentially opens the throttle blades sooner for more power in the lower Rpms. The factory tailored throttle to open and close slowly to avoid harsh acceleration or deceleration, but the sprint booster offers three stages of throttle enhancement (stock, Stage 1, and Stage 2) to improve acceleration and drivabillity.
4.Header
At first there weren’t a lot of companies offering headers for the 3.8L engines, but now companies like Gibson, Borla, Rugged Ridge, and even Rusty’s Off Road Products make ’em. Headers will improve exhaust scavenging, which improves low-end torque. Also, Their increased flow translates into Better high horsepower. It's said that the 3.8L headers are more susceptible to leaks than the factory manifolds, so beware.
5.Programmers
Perhaps more than any Jeep model (besides diesel-powered), the 3.8L responds well to aftermarket ECU tuners. Some rewrite the ECU and some piggyback onto it, plugging into the OBDII port. Just a couple of companies to whet your appetite include Superchips, Diablo Sport, and Hypertech. Most claim gains of up to 21hp/30lb-ft, but we think that’s optimistic. Still, there is performance and economy to be gained with their use.
6.After-Cat Exhaust
It’s simple science; more air out means more air in. And more air means more fuel can be burned along with it. Besides, the factory JK muffler is always getting clunked on rocks and bashed. Several companies like Banks, MBRP, and more offer after-cat exhaust systems, so do some shopping and pick what fits your budget.

Sources

Hypertech
Bartlett, TN 38133
901-382-8888
www.hypertech.com
MBRP Performance Exhaust
N/A, AK
888-636-7223
www.mbrpautomotive.com
Banks Power
Azusa, CA 91702
866-738-5915
http://www.bankspower.com
AEM
Hawthorne, CA 90250
800-992-3000
http://www.aempower.com
Borla
Oxnard, CA 93033
805-986-8600
www.borla.com
Performance Distributors
Memphis, TN 38132
901-396-5782
www.performancedistributors.com
Rugged Ridge
www.ruggedridge.com
DiabloSport
Delray Beach, FL
561-908-0041
DiabloSport.com
Superchips Inc.
Sanford, FL 32773
407-585-7000
www.superchips.com
Gibson Performance Exhaust
Corona, CA 92879
707-996-4591
www.gibsonperformance.com
Rusty's Off Road
256-442-0607
http://www.rustysoffroad.com
Sprint Booster
877-225-5577
http://www.sprintboosterusa.com

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