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Old 01 Apr 2004, 01:01 pm
Fresh Cruiser
  
Join Date: Apr 2004
Location: mukilteo, WA, USA.
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Default Dyno numbers
Took wifes PT to our dyno club meeting.Its a 03 turbo,silencers removed,drop in k&n filter,stage1,11,000 miles on it. Results hp 199.3-torque 264.5.Here is my concern air fuel ratio seemed very high 17.5.Good,bad,ugly?
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Old 01 Apr 2004, 01:13 pm
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paulkopick, welcome to the forum. Sorry I can't answer your question but I sure one of the GT guys will be able to help you.
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Old 01 Apr 2004, 03:58 pm
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The A/Fr was so high because DC needs the car to last thru their 7/70 warranty.

AC
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Old 01 Apr 2004, 04:08 pm
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never mind...brain fart
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Old 01 Apr 2004, 04:56 pm
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Sounds great man, even better than mine with the stock PCM!

3BarBoost said the reason they run so bloody rich at WOT is also to lubricate the cylinder.

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Old 01 Apr 2004, 05:38 pm
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This has the upgraded pcm that came with stage1. What is a safe a/f ratio on the gt compared to our17.5???Thanks all for the input.
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Old 01 Apr 2004, 10:36 pm
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air to fuel ratio i could be wrong but air:fuel......10:1 rich?
17:1 lean?
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Old 01 Apr 2004, 11:06 pm
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17:1 is "MEGA LEAN" (17 parts air to 1 part fuel). I'm surprised you didn't blow your motor and that the dyno operator didn't shut it down immediately.

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Old 02 Apr 2004, 11:50 am
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Wow! Something is very wrong, you are dangerously LEAN!
What exactly does the AFR graph look like?
What RPM are you hitting that 17.5:1? Through the full range or at redline?
Is it possible the wideband is faulty or wasn't hooked up correctly.
What is your boost spiking to? You should be seeing 10:1-12.5:1 depending on certain variables.
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Old 02 Apr 2004, 01:19 pm
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Quote:
quote:Originally posted by paulkopick

This has the upgraded pcm that came with stage1. What is a safe a/f ratio on the gt compared to our17.5???Thanks all for the input.
When you installed the Stage I PCM, did you install the Stage I Injectors?

If you don't install the larger injectors, which are standard on the 04 cars, then this might explain the extremely lean AF ratio.

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