1990 Jeep Cherokee Pioneer 4x4 on 2040-cars

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How to tune a car right: Part 3, tuning Mopar with OST Dyno

Not long ago, I wrote a story about a pony car tuned with a supercharger. The blower install had been done properly. Then the car's owner bolted on a set of great looking wheels wrapped in good looking but inexpensive rubber. On my first test drive, I couldn't get any of that supercharged sweetness to the ground. It was the perfect ride for parking in a Burger King parking lot on a Friday night. I tooled around on a Sunday drive, shaking my head that someone had spent five figures to get more power the right way, with a clean install, then wiped out the gains so thoroughly that the stock engine would likely have overwhelmed the tires. This got me thinking about the ways people ruin their quest for horsepower, either on the front end by not insisting on a clean install and paying the money for it, or on the back end with supplemental purchases like cheap tires or cheap gas. So I called three tuners, one focused on GM, one on Mopar, one on Ford, to find out what people should know about how to get the best power for their goals, and how to make sure they are able to use all that power. The first interview in this three-part series was with Blake Leonard at Top Speed Cincy in Cincinnati, Ohio, the second with Brandon Alsept at BA Motorsports in Milford, Ohio. This third and last interview is with Micah Doban at OST Dyno in Slippery Rock, Pennsylvania, a family business with more than 40 years of Mopar expertise specializing in Gen III Hemis, but tuning everything from land-speed cars and drag racers to Jeeps The interview has been edited for clarity and concision. Do people who come to OST generally know what they want? Probably 80% of the people who come in simply want more power with no particular ET goal [ET is a kind of bracket handicapped drag racing – ed.]. WhatÂ’s the best way to start a Mopar tune? The first thing is what people often skip, and that's to find a tuner or a shop. People will throw parts on their cars that the Internet said to, then go to a tuner who does things a different way, and [the tuner is] like ‘No we don't like to use these injectors, we don't like these parts.Â’ You have to find someone familiar with the parts that are on your car or that you're planning to put on your car. So having a goal and then finding a tuner who can help you with that goal is proper way to start. Exactly. And a lot of tuners have their own formula – and when I say tuner I mean someone that also does work to the cars.

Jeep Grand Cherokee Trailhawk revived and leaked

We'd love to tell you all about the Jeep Grand Cherokee Trailhawk you see here. Thing is, we don't really know all that much. That's because, according to our colleagues at Jalopnik, it hasn't quite been officially unveiled yet. But that's probably right around the corner, now that the cat is out of the bag. From the leaked images, we can tell that this Grand Cherokee Trailhawk is a lot like the Trailhawk that was produced as a special edition for the 2013 model year. Even the graphics look similar. Expect to see some aggressive tires to go along with all the best off-road goodies Jeep has to offer. Throw in some red tow hooks to match the contrasting interior stitching, mix together some underbody protection, and you've probably got yourself a Trailhawk. We'll have to wait until FCA decides to unleash the official goods to know for sure what we're looking at, but we doubt there's a supercharged V8 underhood. We do know that's coming, hopefully soon, but this isn't it. So, while we patiently wait for that Hellcat-powered Trackhawk to make an appearance outside the realm of spy shots, enjoy the Trailhawk you see here. Related Video: Featured Gallery Jeep Grand Cherokee Trailhawk Jeep SUV Off-Road Vehicles

FCA recalling 400k Jeep Wranglers, 40k Fiat 500s

The Basics: Fiat Chrysler Automobiles has issued two recall. The first is for 392,464 Jeep Wranglers in the US from the 2007-2010 model years for the steering wheel airbags. The second covers 39,217 examples of the naturally aspirated 2012-2016 Fiat 500 in connection with the clutch release mechanism. The Problem: In the Wranglers' steering wheel, excessive accumulation of dust and dirt from open-air driving off-road could compromise the clockspring in the steering-wheel assembly and prevent the airbag from deploying in the event of a crash. In the case of the Fiats, the clutch travel in a small percentage of vehicles equipped with manual transmissions "may exceed design parameters" and eventually damage components. Injuries/Deaths: No injuries or accidents been reported to result from either issue. The fix: Dealers will install new back covers and column shrouds in the Jeeps and upgrade the clutch release systems in the 500s. If you own one: Expect to hear from the manufacturer to arrange service. In the case of the Fiat recall particularly, FCA "urges customers to heed the instructions on their recall notices." Related Video: Statement: Clockspring May 18, 2016 , Auburn Hills, Mich. - FCA US LLC is voluntarily recalling an estimated 392,464 older-model SUVs in the U.S. to replace their clockspring assemblies and related components. Located in a vehicle's steering wheel, a clockspring forms part of the circuit that helps control airbag function. An investigation by FCA US determined excessive exposure to dust and dirt – consistent with extensive off-road driving or driving with a vehicle's top and/or doors removed – may compromise the clockspring and eventually prevent driver-side airbag deployment in a crash. If this condition is present, the airbag warning-lamp will be illuminated. If such an event occurs, customers are advised to contact their dealers. The Company is unaware any potentially related injuries or accidents. Affected by this campaign are model-year 2007-2010 Jeep Wrangler SUVs. An additional 7,435 model-year 2011-2016 vehicles equipped with right-hand drive for special duty also are affected in the U.S. Vehicles affected outside the U.S. comprise an estimated 35,412 in Canada; 8,529 in Mexico and 62,580 outside the NAFTA region. Customers will be advised when they may schedule service, which includes installation of a new steering-wheel back cover and a steering-column shroud.