2014 Jeep Grand Cherokee Overland 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.

Buy this instead of a Wrangler | 2017 Jeep Grand Cherokee Trailhawk Review

In our first encounter with the 2017 Jeep Grand Cherokee Trailhawk at Fiat Chrysler's Chelsea Proving Grounds, we saluted the new model's impressive on-road demeanor. In its off-road mode, however, we couldn't ignore the pre-production throttle calibration – it was super sharp and difficult to modulate with the precision needed to navigate obstacles. We were told then that Jeep's engineers were aware of the problem and were fixing it for production models. So we recently set off for Bundy Hill Off-Road Park in Jerome, Michigan, in a production-spec Grand Cherokee Trailhawk to check their work and get a better idea of the overall package. We can report that the Trailhawk's throttle has been fixed for production, landing it properly in Goldilocks territory. In the off-road Mud setting, the throttle is soft and easy to modulate. You can balance this rig with the gas pedal, reaching just past tip-in to steadily prod forward. But the gas pedal doesn't delay when you really need power. Move beyond the initial tip-in, and the engine responds quickly, which is a good thing, as a sluggish throttle is almost as dangerous off-road as one that's too sharp. Rock mode promises even more precise control over the throttle, although our lack of a spotter and a desire to avoid damaging the 700-mile-young Trailhawk kept us from hitting Bundy Hill's rockier sections. The wet, non-snowy weather meant we didn't properly test Snow or Sand mode. This test model was equipped with FCA's popular 3.6-liter V6, but like the rest of the Grand Cherokee range, more power is available from the 3.0-liter EcoDiesel V6 and the 5.7-liter Hemi V8. You don't need them – the 3.6-liter and eight-speed automatic are perfectly fine on the trails. Faced with an incline, the transmission holds its gear without complaint – you don't even need to switch into manual mode. Despite the 4,800-rpm torque peak, the V6's 260 pound-feet arrive early enough that you don't need to strong-arm the throttle. So that's resolution for the pre-production issue. But our time at Bundy Hill exposed a different and ultimately much easier to fix problem for the production model. Late fall in Michigan is not always a good time to go off-road – sub-40-degree temperatures and a steady, depressing drizzle can turn a relatively simple trail into a slippery mess of wet clay. Conditions like these can easily overwhelm an on-road tire like the Goodyear All-Terrain Adventures the Trailhawk uses.

Stellantis not looking for further mergers, including with Renault

MILAN — Stellantis Chairman John Elkann on Monday denied the carmaker was hatching merger plans, responding to press speculation about a possible French-led tie-up with rival Renault. Elkann said that the Peugeot owner, the world's third largest carmaker by sales, was focused on the execution of its long-term business plan. "There is no plan under consideration regarding merger operations with other manufacturers," said Elkann, who also heads Exor, the Agnelli family holding company that is the largest single shareholder in Stellantis. After abandoning the Russian market, at the time its second largest after France, and reducing the scope of its global cooperation with Nissan, Renault has been seen as a potential M&A target. Speculation intensified after an electric vehicle market slowdown forced it last week to cancel IPO plans for its EV and software unit Ampere. Its market cap remains stubbornly low at little over 10 billion euros ($10.8 billion) despite a financial recovery over the past few years. Stellantis, the product of a 2021 merger between France's PSA and Fiat Chrysler and one of the most profitable groups in the industry, has a market cap of more than 85 billion euros when unlisted shares are factored in. It has a 14 brand portfolio also including Citroen, Jeep, Opel and Alfa Romeo. NEWSPAPER REPORT Italian daily Il Messaggero had said on Sunday that the French government, which is Renault's largest shareholder and also has a stake in Stellantis, was studying plans for a merger between the two groups. A spokeswoman for Renault said on Monday the group did not comment on rumors. France's Finance Ministry had declined to comment on Sunday. Stellantis has crossed swords with the Italian government, which has accused it of acting against the national interest on occasions. Industry Minister Adolfo Urso last week raised the prospect of the Italian government taking a stake in Stellantis to help to balance the French influence. Renault shares pared gains after Elkann's comments to stand 1.2% higher by 1220 GMT, having initially risen more than 4%. Stellantis CEO Carlos Tavares, a Portuguese-national, last week said in an interview with Bloomberg that the group was "ready for any kind of consolidation" and that its job was to make sure that it would be "one of the winners". Analysts, however, question the rationale of a Stellantis-Renault merger, which would also expand the group's excess capacity in Europe.