So a customer drops his car off for an AEM tune - 3000GT/Stealth International Message Center
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Old 01-27-2013, 03:24 PM   #1 (permalink)
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Default So a customer drops his car off for an AEM tune

Another shop had "tuned" it but it was running very poorly and could not get over 16psi with out breaking up and just over all running bad. Bad idle that is high, then low, then surges up and down, etc etc.

I will spend some time on it later, building a new map from scratch of course, I never trust another shops map and won't build off of it cause you never know what small detail you will miss on one of the buried graphs etc. But like looking into what was "tuned" at this point and why it may be running poorly.

But here is what I found in 5 minutes looking at it.

92 RTTT
Forged rods and pistons
Forged crank
JDPC TD05 kit
MHI EVOIIIs
Walbro pump
680 PTE
AEM Meth kit
boostaspark
etc

I like to shoot for pump gas (on TD05) 20 degrees at redline at 20psi. It's a good benchmark to kinda aim for.

This AEM was setup with 9 degrees at 20psi at redline. Wow, that's low.

Then I thought, Let me check the base timing. This needs to be set before anything else to ensure when the AEM puts out 15 degrees, the engine will actually be at 15 degrees.

Sure enough, when the car is at idle and the AEM is putting out 15 degrees, the actual mechanical timing on the car is.......5

So at 20psi at redline the car is somewhere around 0 to -1 degrees.

Knock control is set maxed out at 1.4 volts. Very conservative.
Oh wait, if it were turned on. Yep, it's unchecked, it's off.

Looked around for a few more minutes and found some other funny things. Can't wait to dig in and tune her up!

-Chris
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SLTT-10.9 @ 142MPH Stock NA engine and NA heads/Cams

T4 AWD 9.21 @ 154.98 (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)
T2 FWD 10.19 @ 140.31 (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)
T4-159.23 MPH Ran on 6G72 3.1L! (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)
T4-995AWHP Uncorrected 6G72 3.0L C16 (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)
T2-820FWHP 3.1L 27psi C16 (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)

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Old 01-27-2013, 03:31 PM   #2 (permalink)
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Default Re: So a customer drops his car off for an AEM tune

sub'd for results!
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Old 01-27-2013, 04:08 PM   #3 (permalink)
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Default Re: So a customer drops his car off for an AEM tune

I bet the owner will be blown away when it buries him in the seat. That's quite a mod list to be running so shitty!
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Old 01-27-2013, 04:12 PM   #4 (permalink)
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Default Re: So a customer drops his car off for an AEM tune

What shop tuned the car?
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Old 01-27-2013, 04:26 PM   #5 (permalink)
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Default Re: So a customer drops his car off for an AEM tune

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Originally Posted by Italo Grasso View Post
What shop tuned the car?
Def not the shop that tuned yours lol
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Old 01-27-2013, 04:35 PM   #6 (permalink)
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Default Re: So a customer drops his car off for an AEM tune

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Originally Posted by tensecs2fame View Post
Def not the shop that tuned yours lol
That's for sure. Hope you stay away from the shop too..lol
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Old 01-27-2013, 06:33 PM   #7 (permalink)
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Default Re: So a customer drops his car off for an AEM tune

I'm not surprised. This is more common than you think. Quite a few places don't know how to tune our cars properly. They may put out AEM tunes on other platforms but the knowledge isn't there.
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Old 01-27-2013, 06:55 PM   #8 (permalink)
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Default Re: So a customer drops his car off for an AEM tune

Is there any car that would like -1 degrees at 20psi at redline?

It's not my place to divulge where it was tuned at. If he owner wants to post that, he can.

-Chris
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Old 01-27-2013, 07:55 PM   #9 (permalink)
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Default Re: So a customer drops his car off for an AEM tune

iniformance
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Old 01-27-2013, 10:56 PM   #10 (permalink)
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Default Re: So a customer drops his car off for an AEM tune

I read this 3 times and still don't have any words.....
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