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


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Old May 6th, 2020, 01:41 PM   #1 (permalink)
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Performance Mods - New to 4G

I do not have a 4G yet but if/when I do I plan on getting a GT with a manual transmission. I had heard there wasn't much that could be done to it. Maybe
I have read bad info, I am not sure. If the V-6 starts at 260HP (I think I read), how much power can be added to it? What type of mods can be added?

Does anyone know of shops that work on 4Gen Eclipses in the South Carolina/North Carolina/Georgia area?
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Old May 6th, 2020, 03:57 PM   #2 (permalink)
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Basic mods include RRE headers, a 2.75" exhaust, cold air intake, and a tune. Good for about 280whp vs the stock 250whp on the GT.

Then custom work to the head can be done, or a very rare few have added turbos. This is entirely custom, unlike on a GS where you can buy most of what you need. Building the GT motor is also prohibitively expensive vs the GS for the same power
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Old May 11th, 2020, 11:07 AM   #3 (permalink)
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Sabertooth - Thanks for the info/responses. Around how much should mods like those cost? I was hoping to get as close to 400 as possible. No idea how a FWD car handles with over 300hp though. I have only had that RWD vehicles which had between 550-650, never had it tested but the supercharger was rated for 670.
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Old May 11th, 2020, 11:53 AM   #4 (permalink)
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At 400hp, first and second are useless on sport tires, but would be better on race tires.

As for cost, I have no idea what it would cost to get the head work done for 400hp. Custom intake manifold porting, larger throttle body (something you won't see me suggest on a GS), custom head porting, larger valves (unsure which model you can source them from), custom cams. Probably in the $3000-$3500 area, which isn't terrible. But not great
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Old May 11th, 2020, 01:56 PM   #5 (permalink)
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Which is likely to get above 300hp though, the 4cyl or the 6 cyl? I am definitely leaning towards the 6 cyl. It is possible to put a turbo on the 6 cyl?
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Old May 11th, 2020, 03:54 PM   #6 (permalink)
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Which is likely to get above 300hp though, the 4cyl or the 6 cyl? I am definitely leaning towards the 6 cyl. It is possible to put a turbo on the 6 cyl?
Not really
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Old May 12th, 2020, 11:06 AM   #7 (permalink)
140whp+15.72%= 162hp
 
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From what i have read 6cyl is all custom made when it comes to going forced induction. 4cyl has alot more aftermarket support and can make more whp than a GT with a turbo.
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Old May 12th, 2020, 02:02 PM   #8 (permalink)
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The GS is easier to pass 300hp, as well as lighter and more fuel efficient
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Old May 14th, 2020, 03:39 PM   #9 (permalink)
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The GS is easier to pass 300hp, as well as lighter and more fuel efficient
Where can I find a shop that I can trust to work on a 4g though, either 4cyl or 6cyl regarding mods, etc? I am talking about the South Carolina/North Carolina/Georgia area. It seems like I can find a good automatic stock with lower mileage easier than a manual, kinda odd. Also, it seems like GS's are holding their value as well as GT's most places I look. Finding the BEST quality car is as important as finding a shop too I think. Anyone have ideas?!
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Old May 14th, 2020, 04:01 PM   #10 (permalink)
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If you're willing to drive, Stewart Auto up here in London Ontario is pretty good... Hahaha. If you'll be having a shop install all the mods, you may be best off capping things off at the bolt on GT mark. Having a custom turbo install done will be costly.

I'd guess the reason the manual are more expensive is because in the USA, the vast majority of people can't drive manual so don't buy them. But the few people that do REALLY want their sports car to be a manual. So it pumps up the values in the tertiary resale markets

For a GT, the auto is a fine choice, and I even have a project mulling around in my head involving a GT build that I would prefer to be an auto.

For the GS, there's no question, better results have been had with the manual trans on forced induction builds. That said, the sample size of auto trans cars is so small, we can't be fully sure what all factors were involved. One such issue came from gear shifting on the auto trans, but I suspect that in Fastworks you may be able to adjust the shift angle and negate that issue.


Turbo GS install would include, heavily summurized:
Mount new manifold
Custom downpipe
Change MAP sensor
Custom intake
Custom charge piping
Custom intercooler mounting
Custom oil lines
Custom coolant lines (if required by your turbo)
Potential for wastegate exhaust piping (depending on if internal or external)
Change injectors

And maybe some stuff I forgot
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4gen, bad, georgia, info, manual, mods, north, north carolina, performance, power, shops, south carolina, transmission, work

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