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Evo 9 blown...any ideas why

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Old Nov 6, 2008, 04:54 PM
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Evo 9 blown...any ideas why
I have a 06 Evo 9 MR and blew the motor. went at about 5k RPM's in 4th gear


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current mods are AEM EMS, 21 psi, 11.1 AF ratio, AMS turboback, AMS Intercooler, HKS Intake, MAF delete
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Old Nov 6, 2008, 04:56 PM
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im probably pointing out the obvious here, but it looks like detention did a number to your ring lands...

Were you logging knock?
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Old Nov 6, 2008, 05:03 PM
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No knock....... # 4 spark plug electrode was also gone.
Last edited by 1320awd; Nov 6, 2008 at 05:47 PM.
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Old Nov 6, 2008, 05:07 PM
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How many miles did you have?
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Old Nov 6, 2008, 05:07 PM
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Were they the coppers? Whens the last time the plugs were changed?
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Old Nov 6, 2008, 05:09 PM
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Car so stock like that one must likley the tune just my .02
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Old Nov 6, 2008, 05:10 PM
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20k on the motor about 3000 miles with the EMS. Denso Iridium plugs one step colder than stock.
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Old Nov 6, 2008, 05:16 PM
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Originally Posted by 1320awd
20k on the motor about 3000 miles with the EMS. Denso Iridium plugs one step colder than stock.

Bingo.
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Old Nov 6, 2008, 05:17 PM
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AEM EMS + 91 octane fuel

There is not much of a window of saftey when using that **** water they call fuel out there

Maybe a mechanical issue arose which caused the car to run lean or maybe just the tuning parameters did not leave enough meat on the bones to adapt to a bad tank of gas

In either event it looks like detonation damage to me
Last edited by DynoFlash; Nov 6, 2008 at 05:20 PM.
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Old Nov 6, 2008, 05:18 PM
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Looks like it was WAY lean. I'd say the tune wasn't right or fuel pump crapped out.
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Old Nov 6, 2008, 05:18 PM
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Originally Posted by Sharkbite2000
Car so stock like that one must likley the tune just my .02
running the original program for the evo on the EMS. all fields set for 11.1 AF ratio and for autotune.
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Old Nov 6, 2008, 05:19 PM
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tune.
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Old Nov 6, 2008, 05:20 PM
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Did you have an upgraded fuel pump ?
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Old Nov 6, 2008, 05:21 PM
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So who tuned it? Which kind of EMS? Leaving things up to "autotune" sounds a little risky to me...
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Old Nov 6, 2008, 05:21 PM
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Originally Posted by 1320awd
running the original program for the evo on the EMS. all fields set for 11.1 AF ratio and for autotune.
That is no way to tune a car

Auto tune or closed loop is for crusing conditions and idle

NOT for WOT full load

Base maps are jut to get the car to start and then you have to tune from there - usually a lot
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