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Old 12-11-2010, 01:38 PM   #1
90R
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Default emissions tuning

we do a 2 stage dyno emission test. The gearing and stock tire size kills me. It makes the engine lug having to run in 3rd gear.

Anyway
My HC and CO are too high.

25/25 test
HC 210 Allowed 174
CO 4.67 allowed 1.12

50/15 test
HC 233 allowed 180
CO 5.48 allowed 1.01

what's the best way to pull these down? I already pulled 10* of timing out per the inspector.
Drop req fuel?
flat line the AFT target at 15:1?
drop the fuel table by X?
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Old 12-11-2010, 01:57 PM   #2
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Run in 2nd gear?
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Old 12-11-2010, 02:03 PM   #3
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Quote:
Originally Posted by Joe Perez View Post
Run in 2nd gear?
unfortunately that exceeds the RPM limits of the test
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Old 12-11-2010, 03:32 PM   #4
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raise it up and get some big *** tires lol
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Old 12-11-2010, 05:13 PM   #5
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Quote:
Originally Posted by 90R View Post
we do a 2 stage dyno emission test. The gearing and stock tire size kills me. It makes the engine lug having to run in 3rd gear.

Anyway
My HC and CO are too high.

25/25 test
HC 210 Allowed 174
CO 4.67 allowed 1.12

50/15 test
HC 233 allowed 180
CO 5.48 allowed 1.01

what's the best way to pull these down? I already pulled 10* of timing out per the inspector.
Drop req fuel?
flat line the AFT target at 15:1?
drop the fuel table by X?
Post your timing map. & some specs on your setup. What was your AFR target/ Do you have a cat / how old are your plugs/ etc?
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Old 12-11-2010, 06:11 PM   #6
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heres my normal msq. The only change was I pulled 10 out of the timing table, over every cell.
I'm NA with a cat

Last edited by 90R; 12-12-2010 at 07:35 PM.
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