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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford SVT Raptor General Discussions [GEN 1]
Gas question
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<blockquote data-quote="BoostedToy" data-source="post: 1812331" data-attributes="member: 31712"><p>I have a 2013 Roush Stage II. I have a VMP tune and 72mm pulley (versus the 75mm from Roush). It is tuned for 93 octane, which is relatively limited in the area I live in but there are a couple that have it. If in a pinch, I have Boostane and give it a little more than the ratios prescribe for 93 octane for a margin of safety. </p><p></p><p>With that, on custom tunes, including Roush, the timing is prescribed (open loop) versus from the factory where it’s running closed loop and is constantly analyzing and compensating. Running less than 91 effective octane in your Roush is going to be problematic. I would encourage 93 octane if you have it available. Keep in mind that over time, carbon build up and other age / wear related matters will further reduce effective octane. Your 91 octane on an engine with some wear and carbon build up could very well be operating at a lower effective octane as a result.</p></blockquote><p></p>
[QUOTE="BoostedToy, post: 1812331, member: 31712"] I have a 2013 Roush Stage II. I have a VMP tune and 72mm pulley (versus the 75mm from Roush). It is tuned for 93 octane, which is relatively limited in the area I live in but there are a couple that have it. If in a pinch, I have Boostane and give it a little more than the ratios prescribe for 93 octane for a margin of safety. With that, on custom tunes, including Roush, the timing is prescribed (open loop) versus from the factory where it’s running closed loop and is constantly analyzing and compensating. Running less than 91 effective octane in your Roush is going to be problematic. I would encourage 93 octane if you have it available. Keep in mind that over time, carbon build up and other age / wear related matters will further reduce effective octane. Your 91 octane on an engine with some wear and carbon build up could very well be operating at a lower effective octane as a result. [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
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Gas question
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