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Exhaust leak or normal?

Just got back from the shop, I'm uploading dyno information right now. The issues was with the M370 intake manifold. I'm not sure if it was installed incorrectly or something

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Old 03-31-2012, 02:41 AM   #1 (permalink)
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Just got back from the shop, I'm uploading dyno information right now. The issues was with the M370 intake manifold. I'm not sure if it was installed incorrectly or something is wrong with it. I did two pulls as you can see from the graph, the powerloss was really bad. We swapped out the manifold and put the stock back one and instantly made nearly 100whp more. Doing only two pulls and no ecu learning, I gained 16whp over my previous setup.

The first dyno is a comparison between my best run and the M370 manifold run. The second dyno sheet is a comparison with the stock manifold back on with my baseline dyno. Again this is no tuning and SES on.
Attached Images
File Type: jpg M370 dyno.jpg (546.2 KB, 54 views)
File Type: jpg stock Manifold dyno.jpg (740.8 KB, 41 views)
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Last edited by SS_Firehawk; 03-31-2012 at 03:20 AM. Reason: Dyno sheet
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Old 03-31-2012, 03:35 AM   #2 (permalink)
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Just got back from the shop, I'm uploading dyno information right now. The issues was with the M370 intake manifold. I'm not sure if it was installed incorrectly or something is wrong with it. I did two pulls as you can see from the graph, the powerloss was really bad. We swapped out the manifold and put the stock back one and instantly made nearly 100whp more. Doing only two pulls and no ecu learning, I gained 16whp over my previous setup.

The first dyno is a comparison between my best run and the M370 manifold run. The second dyno sheet is a comparison with the stock manifold back on with my baseline dyno. Again this is no tuning and SES on.
I thought you had it installed prior to having the intakes put on? Anyways I doubt there's anything physically wrong with the manifold, maybe just a minor installation mishap? I can snap photos of mine installed if you need something to go off of. I installed mine well over a year ago so my memory isn't the greatest but there's an added hose that extends and Tees off.
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Old 04-01-2012, 08:55 PM   #3 (permalink)
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I thought you had it installed prior to having the intakes put on? Anyways I doubt there's anything physically wrong with the manifold, maybe just a minor installation mishap? I can snap photos of mine installed if you need something to go off of. I installed mine well over a year ago so my memory isn't the greatest but there's an added hose that extends and Tees off.
That would be great if you could. Tony @ Motordyne met me during lunch outside six flags on his own time to help. He thinks maybe one of the throttle bodies could have been disconnected. I also am missing the metal plate that sits on top. I bought this used and he is shipping one to me free! Customer service is absolutely outstanding. After I get it reinstalled and the car tuned, ill be posting results in the M370 million page thread as well as my own that turned more into a build thread. I will also post what the issue was after I figure it out.
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Old 04-01-2012, 09:05 PM   #4 (permalink)
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That would be great if you could. Tony @ Motordyne met me during lunch outside six flags on his own time to help. He thinks maybe one of the throttle bodies could have been disconnected. I also am missing the metal plate that sits on top. I bought this used and he is shipping one to me free! Customer service is absolutely outstanding. After I get it reinstalled and the car tuned, ill be posting results in the M370 million page thread as well as my own that turned more into a build thread. I will also post what the issue was after I figure it out.
Will do, I'll need to get the pictures done TOMORROW as I'm going back to the stock manifold. I'm ONLY doing this because with the GTM kit, I'm using the canned tune and need to be using the stock manifold so it doesn't throw the tune off.

I will tell you this, I LOVE that damn intake manifold. It made gobs of power towards the mid-range and we all know the 37VHR isn't a torque based motor.
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