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Cobra Forums
2013-14 Shelby GT500
Upper/Lower pulley combo for 2.9 Whipple on 13/14 = Boost?
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<blockquote data-quote="Streetpwr281" data-source="post: 15589785" data-attributes="member: 55660"><p>Finally got the IW 15% lower installed and Dyno tuned the car today. The 2.9 is still only making 16psi now w 3.0 upper and aforementioned 15% lower. Whipple indicates it's not out of line for a 13/14 5.8L w 1 7/8 LTs and my tuner is confident no mechanical issues exist. On his Mustang Dyno the car made right at 700rwhp in 85 degree air today. Given his past experience that likely translates to 740rwhp - 770rwhp on most Dynojets. I guess that's not bad on pump 93 at "only" 16psi of peak boost. Thoughts?</p><p></p><p>Next mod in a couple months will be a 2.75" UP w tensioner hoping to see 18psi. Appears that is all the 2.9L Whipple can muster on the larger 5.8L engine.</p><p></p><p></p><p>Sent from my iPhone using Tapatalk</p></blockquote><p></p>
[QUOTE="Streetpwr281, post: 15589785, member: 55660"] Finally got the IW 15% lower installed and Dyno tuned the car today. The 2.9 is still only making 16psi now w 3.0 upper and aforementioned 15% lower. Whipple indicates it's not out of line for a 13/14 5.8L w 1 7/8 LTs and my tuner is confident no mechanical issues exist. On his Mustang Dyno the car made right at 700rwhp in 85 degree air today. Given his past experience that likely translates to 740rwhp - 770rwhp on most Dynojets. I guess that's not bad on pump 93 at "only" 16psi of peak boost. Thoughts? Next mod in a couple months will be a 2.75" UP w tensioner hoping to see 18psi. Appears that is all the 2.9L Whipple can muster on the larger 5.8L engine. Sent from my iPhone using Tapatalk [/QUOTE]
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2013-14 Shelby GT500
Upper/Lower pulley combo for 2.9 Whipple on 13/14 = Boost?
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