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How do you run 24.5psi on 91 oct???

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Old Feb 27, 2008, 07:34 PM
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Originally Posted by Jim in Tucson
Oh yes. Right now at 21psi I'm running 0 timing advance at torque peak. Any more boost and I really need to be running negative timing, which I understand to be a bad idea.
0* at peak torque, at only 21psi? Is this common for VIII's on pump gas?
Old Feb 27, 2008, 07:43 PM
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Originally Posted by zl1560
What's your afr at peak boost? You could try throwing some more fuel at it to slow down the burn. Is there harm in negative timing, anyone?
<Jim slinking to the podium>

Actually I don't have a wideband on the EVO. I had a WB on my previous car for years - Innovate. I got sick of the glove box always being full of tunning gear. As soon as someone offers a simple plug-and-play WB solution for the EVO that works readily with EVOscan, I'll have one.

<Red faced, Jim hangs his head and sits down>

Last edited by Jim in Tucson; Feb 28, 2008 at 05:56 AM.
Old Feb 27, 2008, 07:45 PM
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Originally Posted by ChuckP
0* at peak torque, at only 21psi? Is this common for VIII's on pump gas?
I only know one VIII. Mine. This is on ACN91. Worse than pump gas.
Old Feb 27, 2008, 07:49 PM
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on 93 I run 2* at peak load @23.5psi.. peak torque happens around 4500 rpm at that point boost is 22.5 psi and timing is 5*

Last edited by Jorge T; Feb 27, 2008 at 07:52 PM.
Old Feb 27, 2008, 09:05 PM
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Originally Posted by Jim in Tucson
<Jim slinking to the podium>

Actually I don't have a wideband on the EVO. I had a WB on my previous car for years - Innovate. I got sick of the glove box always being full of tunning gear. As soon as someone offers a simple plug-and-play WB solution for the EVO that works readily with EVOscan, I'll have one.

<Read faced, Jim hangs his head and sits down>
Zeitronix works and logs in evoscan no problem.
Old Feb 27, 2008, 09:39 PM
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Originally Posted by Jim in Tucson
<Jim slinking to the podium>

Actually I don't have a wideband on the EVO. I had a WB on my previous car for years - Innovate. I got sick of the glove box always being full of tunning gear. As soon as someone offers a simple plug-and-play WB solution for the EVO that works readily with EVOscan, I'll have one.

<Read faced, Jim hangs his head and sits down>
Innovate LC1...no gauge or wires hangin everywhere. Just plug in a serial to usb and in works perfectly with evoscan. Cant even tell its in the car being as its really one solid wire tucked away. Plus its probably the most accurate one available.
Old Feb 27, 2008, 09:43 PM
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Originally Posted by razorlab
Zeitronix works and logs in evoscan no problem.
+1, yes indeed. good stuff.
Old Feb 27, 2008, 09:51 PM
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One thing I forgot to ask but some might have noticed, is in my log I also logged what is labeled as Knock Sensor Voltage. It doesnt seem to match any of the knock counts consistently or in linear fashion. Can anyone confirm that request 30 in the MUT table is actually Knock Voltage?

No clean passes tonight, too much traffic, and it was wet enough that any launches resulted in little more than wheelspin and lower than set boost When I get some dryer weather I will update with new logs. Kind of wish I had a compressor map for the Green at this point.

JB
Old Feb 27, 2008, 09:52 PM
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Originally Posted by Jim in Tucson
<Jim slinking to the podium>

Actually I don't have a wideband on the EVO. I had a WB on my previous car for years - Innovate. I got sick of the glove box always being full of tunning gear. As soon as someone offers a simple plug-and-play WB solution for the EVO that works readily with EVOscan, I'll have one.

<Read faced, Jim hangs his head and sits down>
To the left of the glove box there is a huge gap, where i store my zeitronix box, wires and usb converter. Then its just 1 usb wire that pokes its head out by my passenger seat.

Has your car been tuned by someone other than yourself?
Old Feb 27, 2008, 10:49 PM
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Originally Posted by Jim in Tucson
<Jim slinking to the podium>

Actually I don't have a wideband on the EVO. I had a WB on my previous car for years - Innovate. I got sick of the glove box always being full of tunning gear. As soon as someone offers a simple plug-and-play WB solution for the EVO that works readily with EVOscan, I'll have one.

<Read faced, Jim hangs his head and sits down>
Get a wideband. Car might be a bit too lean thats all. Other VIIIs on here running more than 21psi, with 91 octane and 2° or 3° at peak just fine.
Old Feb 28, 2008, 06:05 AM
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Originally Posted by ChuckP
To the left of the glove box there is a huge gap, where i store my zeitronix box, wires and usb converter. Then its just 1 usb wire that pokes its head out by my passenger seat.

Has your car been tuned by someone other than yourself?
Yes, dyno tuned locally and then by Chris at Mellon Tuning. Reviewed in this thread.

Cliffs = gained 50 ft lbs at low rpms.
Old Feb 28, 2008, 06:57 AM
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How do you run 25 psi on 91 oct? Probably with ignition set below detonation borderline, but I never had to run 91 octane. One thing that would be good to know on the contrary is the cam settings TTP uses on his MR
Old Feb 28, 2008, 08:32 AM
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Originally Posted by Jim in Tucson
<Jim slinking to the podium>

Actually I don't have a wideband on the EVO. I had a WB on my previous car for years - Innovate. I got sick of the glove box always being full of tunning gear. As soon as someone offers a simple plug-and-play WB solution for the EVO that works readily with EVOscan, I'll have one.

<Red faced, Jim hangs his head and sits down>
I have the AEM wideband which is the size of a regular guage and logs in evoscan with a little "how to" forum reading.
Old Feb 28, 2008, 09:33 AM
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<p>
Originally Posted by Jim in Tucson
Yes, dyno tuned locally and then by Chris at Mellon Tuning. Reviewed in <a href="https://www.evolutionm.net/forums/showthread.php?t=307002" target="_blank">this thread</a>.</p>
<p>&nbsp;</p>
<p>Cliffs = gained 50 ft lbs at low rpms.
</p>
<p>&nbsp;</p>

What AFR did mellon have you at during peak torque?
Have you changed anything since the tune?
Might just be too lean there.
Old Feb 28, 2008, 09:41 PM
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Something I noticed when I got bored last night and started looking is; My map for 29psi (ish) uses the timing numbers for a stock IX in the same load cells from 6k up. I am only advanced 2-3* more from 5750 and down. Question then is what turbo was Mitsu using when they figured that those where the limits? Cause man I gotta tell you it was spot on for my combo as it sits right now.

JB


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