Should my turbo feel like this?
Mar 28, 2008, 05:24 PM
#1
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Should my turbo feel like this?
Is my turbo supposed to pull evenly up to redline? I know it falls off as the RPMs climb, but shouldnt it still be smooth and consistent? Mine is really spurty. It pulls hard in little bouncy spurts as you step on the gas and the RPMs climb. Is this normal or ...?
The sensation is like what it would feel like if you were loosing grip while trying to accelerate really quickly... bouncy in the acceleration, like little cuts in the power. Hopefully someone understand what Im trying to explain.
The sensation is like what it would feel like if you were loosing grip while trying to accelerate really quickly... bouncy in the acceleration, like little cuts in the power. Hopefully someone understand what Im trying to explain.
Mar 28, 2008, 05:29 PM
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i dont know what the problem is...but from what it sounds like... something is not working as it should...my car dosent pull like that... is this only full throttle or just all the time?
Mar 28, 2008, 05:44 PM
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If you're talking about it pulling unevenly in full throttle, what you're experiencing is normal for an Evo X. Reason being, Mitsubishi made it run very rich so it feels bouncy. From hear-say, it's said that they will be releasing a retune to fix this issue.
Don't be alarmed. But remember, you have a warranty, use it. The more people that take their X's to their dealerships, the faster the issue will be resolved.
Don't be alarmed. But remember, you have a warranty, use it. The more people that take their X's to their dealerships, the faster the issue will be resolved.
Mar 28, 2008, 06:13 PM
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I concure, it is the pig-rich AF mix. Mine hits a blip around 6500 rpm. Around 3000rpm the car should start to "pull" more and more till the boost starts to tapper off, take a look at the dyno graphs, at ?6000rpm?. So yes it should be smooth and not jerky.
Reason being, my thoughts, Fuel Vapor is more flamable than fuel itself. When you have a "rich" mixture, meaning to much fuel, it will not ignite correctly. 12:1 is Ideal, infact "In Naturally Aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 - 13.3:1 or λ of 0.85 - 0.901."-wikipeadia. It's hard to gauge the exact AFR so I've been told 12:1 is ideal but reach for 11:1 to be safe. As the more fuel you add the cooler the engine will run. I believe one preformance shop suggested that the EvoX runs better richer than leaner.
http://en.wikipedia.org/wiki/Air-fuel_ratio
Or I could be wrong.
Reason being, my thoughts, Fuel Vapor is more flamable than fuel itself. When you have a "rich" mixture, meaning to much fuel, it will not ignite correctly. 12:1 is Ideal, infact "In Naturally Aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 - 13.3:1 or λ of 0.85 - 0.901."-wikipeadia. It's hard to gauge the exact AFR so I've been told 12:1 is ideal but reach for 11:1 to be safe. As the more fuel you add the cooler the engine will run. I believe one preformance shop suggested that the EvoX runs better richer than leaner.
http://en.wikipedia.org/wiki/Air-fuel_ratio
Or I could be wrong.
Mar 28, 2008, 06:18 PM
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Is my turbo supposed to pull evenly up to redline? I know it falls off as the RPMs climb, but shouldnt it still be smooth and consistent? Mine is really spurty. It pulls hard in little bouncy spurts as you step on the gas and the RPMs climb. Is this normal or ...?
The sensation is like what it would feel like if you were loosing grip while trying to accelerate really quickly... bouncy in the acceleration, like little cuts in the power. Hopefully someone understand what Im trying to explain.
The sensation is like what it would feel like if you were loosing grip while trying to accelerate really quickly... bouncy in the acceleration, like little cuts in the power. Hopefully someone understand what Im trying to explain.
Last edited by love9sick; Mar 28, 2008 at 06:20 PM.
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Mar 28, 2008, 07:47 PM
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Mine feels somewhat sporadic under load in high rpm's as well. This has been discussed. Correct me if I'm wrong, but a couple of shops and some people have mentioned that adding an intake, catback and or MBC will help it run leaner and remedy the stuttering your referring to.
Mar 28, 2008, 10:32 PM
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Reason being, my thoughts, Fuel Vapor is more flamable than fuel itself. When you have a "rich" mixture, meaning to much fuel, it will not ignite correctly. 12:1 is Ideal, infact "In Naturally Aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 - 13.3:1 or λ of 0.85 - 0.901."-wikipeadia. It's hard to gauge the exact AFR so I've been told 12:1 is ideal but reach for 11:1 to be safe. As the more fuel you add the cooler the engine will run. I believe one preformance shop suggested that the EvoX runs better richer than leaner.
Or I could be wrong.
Or I could be wrong.
Fedja
Mar 29, 2008, 12:16 AM
#12
Is my turbo supposed to pull evenly up to redline? I know it falls off as the RPMs climb, but shouldnt it still be smooth and consistent? Mine is really spurty. It pulls hard in little bouncy spurts as you step on the gas and the RPMs climb. Is this normal or ...?
The sensation is like what it would feel like if you were loosing grip while trying to accelerate really quickly... bouncy in the acceleration, like little cuts in the power. Hopefully someone understand what Im trying to explain.
The sensation is like what it would feel like if you were loosing grip while trying to accelerate really quickly... bouncy in the acceleration, like little cuts in the power. Hopefully someone understand what Im trying to explain.
Mar 29, 2008, 01:54 AM
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future ECU reflash from mitsu VS. mods intake/exhaust. Which one to solve this problem? My reason for the question is that once I get mods I don't want to show up with them on my car at the mitsu dealer for the reflash..if you guys get my drift. So if I mod my car and the re-flash comes out I probably will not show up for it.
Same here.
Same here.
Mar 29, 2008, 09:06 AM
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I want to modify the intake and exhaust. Ive never modified any of my sports cars before as I am not mechanically inclined, but I know that the Evo will be my introduction to it. My only hesitation is the warranty thing. Which wouldnt really be as much of an issue if the car was not a first year car.
Is the warranty void if I do anything to the car? Im assuming yes.
Is the warranty void if I do anything to the car? Im assuming yes.