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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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Old 04-04-2010, 05:31 PM
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Default DSP Spark/fuel

I have the DiabloSport Preditor and was wondering if anyone has adjusted the wot fuel and wot spark? What do they do?
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Old 04-04-2010, 05:37 PM
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I've adjusted the WOT Fuel to add a bit AFTER knowing my Air Fuel ratio...I was running pretty lean. After the adjustment, my WOT air fuel ratio was spot on.

I left WOT spark alone ... that's best for adjustment for an authorized DS CMR tuner.
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Old 04-04-2010, 11:23 PM
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It's something you need to have info to work with. If you know carburator tuning, it's quite similar, lots of trial and error, and you'll know when you're very off when your motor sounds like it's choking. If you install a narrow-band A/F sensor you'll have a better idea what you'll need when it comes to bumping the WOT fuel. As for the spark, if you're getting any pinging or detonation, you can retard the timing, or advance it if required, but bear in mind, this is a very finiky thing and easy to do some damage.
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