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SVT Shelby GT500
2011 GT500 whipple 2.9 dyno numbers
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<blockquote data-quote="mustangc" data-source="post: 10159896" data-attributes="member: 87570"><p>Thanks for the feedback, Jared. The larger injectors would allow more fuel flow at a given pressure, thus putting less of a load on the original pump by allowing it to run lower pressures. That makes sense.</p><p></p><p>However, I don't agree with the attacks of aftermarket tuners on Ford's tune. Yes, Ford's tune isn't super aggressive, but like you said, no good aftermarket tune will be right on the ragged edge, either, unless the tuner can get exact A/F ratio readings on a live dyno tune.</p><p></p><p>What the Ford tune offers besides emissions legality is the addition of stock driveability in multiple environmental conditions, and proven durability. Case in point: Ultra large injectors are extremely difficult to modulate at low fuel flow levels. That is one of the reasons why the Ford GT used dual injectors for each cylinder. I would speculate that this is also one of the reasons why whipple / FRPP chose to use an upgraded pump instead of garden-hose sized injectors.</p><p></p><p>More horsepower does not necessarily equal a better tune. And in the case of this example, the horsepower quoted by the OP is less than what the emissions legal Ford tune produces anyway.</p></blockquote><p></p>
[QUOTE="mustangc, post: 10159896, member: 87570"] Thanks for the feedback, Jared. The larger injectors would allow more fuel flow at a given pressure, thus putting less of a load on the original pump by allowing it to run lower pressures. That makes sense. However, I don't agree with the attacks of aftermarket tuners on Ford's tune. Yes, Ford's tune isn't super aggressive, but like you said, no good aftermarket tune will be right on the ragged edge, either, unless the tuner can get exact A/F ratio readings on a live dyno tune. What the Ford tune offers besides emissions legality is the addition of stock driveability in multiple environmental conditions, and proven durability. Case in point: Ultra large injectors are extremely difficult to modulate at low fuel flow levels. That is one of the reasons why the Ford GT used dual injectors for each cylinder. I would speculate that this is also one of the reasons why whipple / FRPP chose to use an upgraded pump instead of garden-hose sized injectors. More horsepower does not necessarily equal a better tune. And in the case of this example, the horsepower quoted by the OP is less than what the emissions legal Ford tune produces anyway. [/QUOTE]
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SVT Shelby GT500
2011 GT500 whipple 2.9 dyno numbers
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