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4G Eclipse GT/SE Specific 3.8L V6 (6G75) Specific Forum


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Old December 30th, 2019, 05:03 PM   #1 (permalink)
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Name: STEVE
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Current owner 07 gt v6 automatic had one of these about a decade ago was running High 13 with automatic headers intake heat spacers some suspension however today it seems like absolutely no performance parts are available. First of all why these cars are awesome and secondly any helpful information would be greatly appreciate it I am tired to losing races against Hondas and modern-day Ford escorts
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Old December 30th, 2019, 07:35 PM   #2 (permalink)
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GS aftermarket is huge and growing fast, the GT not so much.

The reason being that the GS is more common, it shares so much in common with the evo 4G63 motor, is lighter, and handles better than the GT, as well as has miles more engine bay space to work. Most 4G Eclipse 300whp and up are GS

When there's no market of people buying GT parts, there's no incentive to sell GT parts.


A limited slip dif, some good tires, and a tune would help significantly. If you have cats, odds are they are plugged (06 and 07 GT were especially prone to it), so fresh ones of those, or removed if that's something you can do in your area will wake it up. RRE can't make the headers anymore due to legalities, being in California. RIPP stopped selling SC kits after someone set their car on fire by not securing their fuel line and tried to blame them. Suspension parts all still exist. Heat spacers honestly didn't ever do much of anything and were a gimmick unless you have really good engine bay ventilation.
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Last edited by Sabertooth^2; December 30th, 2019 at 07:38 PM.
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Old January 2nd, 2020, 06:53 PM   #3 (permalink)
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Its a shame but true. I honestly think the 6g75 is one of my favorite Mitsubishi engines. I've got a evo 9 and I like the "feel" of the 6g75 more. Granted the evos a better car in almost every way imaginable.
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Old January 3rd, 2020, 07:43 AM   #4 (permalink)
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Drop that Evo 9 driveline and brakes into an Eclipse body, and you'll have the best of both worlds
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Old January 3rd, 2020, 08:17 AM   #5 (permalink)
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Originally Posted by Sabertooth^2 View Post
Drop that Evo 9 driveline and brakes into an Eclipse body, and you'll have the best of both worlds
Does it really all just go in?
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Old January 3rd, 2020, 08:29 AM   #6 (permalink)
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More or less. The driveshaft is 2cm too long, but a custom rear dif mount can solve that. Axles are too short, but you can get longer ones made up stronger than OEM for under $500 at the right shop. I wouldn't bother with the engine unless DOHC is an advantage to you, but I prefer the extra flow and lighter rotating mass of the 69 over the extra low RPM drivability of the 63
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Old January 3rd, 2020, 09:50 AM   #7 (permalink)
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Accessibility is a big factor. The GS was essentially a sporty-looking economy car while the GT was supposed to go up against Mustang GTs, 350Zs, and the RX-8. It was also competing with Honda Accord coupes, the Pontiac G6, and the Nissan Altima coupe. When the car launched in 2006, its performance envelope was comparable to all of these cars.

What happened though was the Chevy Camaro, whose base model would cane most of these cars in their existing trims. Honda avoided competing with that by moving the accord more upscale and making it more luxurious. Nissan dropped the Altima coupe and added power to the 350Z then overhauled it a couple years later with the 370z. Ford pulled the really good 3.5 out of their Taurus and tuned it for better horsepower and pulled a new V8 out of their ass for their performance model. This all happened over the course of about three years.

So that left Pontiac and Mitsubishi with two cars that were no longer reasonably competitive; their 'economy sport' cars were slow and had worse economy then most of the competitive segment, and the higher-end versions were the same, also slow with comparatively-poor fuel economy. Mitsu made matters worse with the premium fuel requirements of the engine, while the new Mustang GT made about 150 more HP and ran on 87, and GM's LS has long been known as cheap, reliable power. GM shuttered Pontiac and Mitsubishi responded with what little money they had with a mid-cycle refresh that added dual exhaust ports and that's about it.

Most people I think bought the GS because they weren't exactly shopping for a sports car and found that it fit their needs, or were struck by it's appearance so much that they overlooked the faults. Anybody who wanted a go-fast speedster would walk right past the Eclipse on their way to test-drive an Evo, who would want to pay $25k for a sports car with FWD and a big heavy thirsty engine that will only drink the finest of fuels? After Hyundai released the Genesis, there wasn't really a market for either car, as the genesis was objectively better in both 4 and 6 cylinder trims. Mitsubishi would put all kinds of money on the hoods of GSs to move them and reduced GT production numbers to sell only to people who wanted an Eclipse.

That's made used GTs a great market value though. They're still plenty quick, the drivetrain is exceptionally durable if you do the proper maintenance, and the sun&sound package gives you a stereo that's as good as anything you can buy in a car new today. You can still do the basic bolt-ons to get more power. A GS can outpower a GT but you have to put a lot of money into it to get it there because you're trying to find about 100HP; you have to go with boost. The GT can add about 40, maybe 50HP through bolt-ons, but after that you're going to need to custom-fabricate more performance.
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automatic, cars, fast, gt v6, headers, heat, intake, parts, performance, performance parts, spacers, suspension

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