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Old 12-29-2011, 02:27 AM   #1
gstv
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Acceleration Noise

so every time i accelerate my evo makes a rattling noise but it only makes the noise when its under 2000rpm every gear except 1st does anyone know what it might be?
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Old 12-29-2011, 02:33 AM   #2
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your bad driving
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Old 12-29-2011, 02:39 AM   #3
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i just got the car on monday so its not my driving i had evo 8 never had that problem
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Old 12-29-2011, 02:44 AM   #4
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If it's stock exhaust then yes, it's your driving. If it's a loud, rumbly exhaust then it's your exhaust.

If it's a vibration that you feel vibrating your entire buttocks, then you are simply giving way too much throttle at way too low of an RPM...
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Old 12-29-2011, 02:45 AM   #5
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There's a turbo in your car, just to let you know.
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Old 12-29-2011, 02:46 AM   #6
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Quote:
Originally Posted by Frankiago View Post
If it's stock exhaust then yes, it's your driving. If it's a loud, rumbly exhaust then it's your exhaust.

If it's a vibration that you feel vibrating your entire buttocks, then you are simply giving way too much throttle at way too low of an RPM...
too much load under low rpm, kiss your rods goodbye.
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Old 12-29-2011, 02:54 AM   #7
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What are you doing driving under 2,000 RPM's in any gear but first? It's just how you're driving. Keep it no lower than 3,000.
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Old 12-29-2011, 02:57 AM   #8
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What are you doing driving under 2,000 RPM's in any gear but first? It's just how you're driving. Keep it no lower than 3,000.
Not good advice. When I DD I pretty much always drive between 2-3k rpms.
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Old 12-29-2011, 02:58 AM   #9
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thanks dynastyx will not drive under 3000rpm any more i was trying to save gas by shifting early since the evo is horrible on gas but i see that is not worth it anymore rather spend money on gas than on repairing my car
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Old 12-29-2011, 03:02 AM   #10
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Keeping it >3k rpm all the time is a stretch to say the least. You can drive under 2k rpm no problem, I do it all the time... the throttle position is key though. I tend to gently caress the throttle when I'm that low, then at 2.5k rpm it'll take whatever I want to give it. I've logged what my tune is set up for and for my particular tune this is extremely safe. I only hit like 23psi on stock turbo until I'm well into the 3,000's where it ramps up to 27psi.

Stock tune is similarly safe. It is moderately rich and limited to what, 22-23psi depending on altitude and weather conditions?
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