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Need Help with Dyno Results

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Old Nov 15, 2005 | 01:39 PM
  #1  
EStreeter's Avatar
EStreeter
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From: Tulsa OK
Default Need Help with Dyno Results

I recently had my car dynoed. Last time it ran 310.1 rwhp and 315.6 rwtq in July.

The car is an 03 coupe, A4, 3:15 gears. It has Kook's LTs, Kook's x-pipe with hi-flow cats, blackwing with air bridge and smooth coupler, and corsa exhaust. No tune yet but I recently changed plugs for NGK Tr55s gapped at .55.

Look at the attached chart. The car breaks up bad starting at about 4800rpm thru 5500 rpm. It ran 322.2 rwhp and 352 rwtq but these were just spikes. It is also running rich - 12 afr and it drops from there.

What would make the car break up like that? The tuner thinks it might be something mechanical and suggested I find out what is going on before doing the tune. He thinks its sensing a knock but the car doesn't throw any codes and seems to run strong.

Any suggestions?

Thanks.

Last edited by EStreeter; Nov 15, 2005 at 02:46 PM.
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Old Nov 15, 2005 | 01:52 PM
  #2  
99droptopc5's Avatar
99droptopc5
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cracked spark plug..
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Old Nov 15, 2005 | 02:02 PM
  #3  
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LG Motorsports
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From: Dallas Tx
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Default

Originally Posted by EStreeter
I recently had my car dynoed. Last time it ran 310.1 rwhp and 315.6 rwtq in July.

The car is an 03 coupe, A4, 3:15 gears. It has Kook's LTs, Kook's x-pipe with hi-flow cats, blackwing with air bridge and smooth coupler, and corsa exhaust. No tune yet but I recently changed plugs for NGK Tr55s gapped at .55.

Look at the attached chart. The car breaks up bad starting at about 4800rpm thru 5500 rpm. It ran 322.2 rwhp and 352 rwtq but these were just spikes. It is also running rich - 12 afr and it drops from there.


What would make the car break up like that? The tuner thinks it might be something mechanical and suggested I find out what is going on before doing the tune. He thinks its sensing a knock but the car doesn't throw any codes and seems to run strong.

Any suggestions?

Thanks.

Tulsa is not that far from Dallas. plan a day trip and we can do a LS1 edit tune for you and get your dnyo looking better.

Just call us at 972-429-1963 and we will help you out.

Thanks
Lou Gigliotti
www.lgmotorsports.com
972-429-1963
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Old Nov 15, 2005 | 02:51 PM
  #4  
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TSDuke
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From: Fayetteville NC
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It seems to coincide with the drop in your aif fuel ratio. That badboy is running super rich. Lean it out, & you'll pick up some extra power too.
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Old Nov 15, 2005 | 02:58 PM
  #5  
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From: Burlington NC
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Cracked plug is my guess too. Bring the car to Lou at LGM and he will make it right.

Randy
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