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Timing with Race Gas

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Old May 9, 2011 | 12:13 PM
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Default Timing with Race Gas

I sprayed the Silverado for the first time this Saturday and want to be safe when I start increasing the shot. I started on a 50 shot but want to go as high as 200.

If I am running 91 oct gas on say a 100 shot with 4 degrees pulled would I still have to pull that timing if I used race(100, 109, C16 etc.) gas?

BTW, the 50 shot dropped my times 1/2 second. I did not have a wideband and I did not pull the plugs because it was just a 50 shot.
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Old May 10, 2011 | 12:12 PM
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Anyone!
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Old May 10, 2011 | 01:20 PM
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Graham@NitrousOutlet
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Ask your plugs.

You are probably fine but no one but the timing strap can tell you for sure.
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Old May 10, 2011 | 01:27 PM
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If the timing mark on the strap is perfect on 91 and I run 109 in the tank to be more safe from detonation for a track event will the timing mark change?
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Old May 10, 2011 | 01:36 PM
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Yes.

If the tune up is safe on 91. Add the higher octane fuel and make a pass. See where the timing mark lies with the added octane.
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Old May 10, 2011 | 02:06 PM
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Just curious.. what are you using to pull timing?
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Old May 10, 2011 | 04:52 PM
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I have both HPT and EFI Live and currently I am using EFI to reflash the PCM to pull timing but I am going to reflash it using one of there COS so I can pulltiming on the fly by activating the nitrous.

It gets tedious having to flash when you want to spray and I don't want to use the resister trick. I sprayed it for the first time this past Saturday and will be upping the spray slowly and then install the COS.
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