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Mustang Forums
2011-2014 Mustangs
Power-Adders
69mm VMP pulley...how much boost?
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<blockquote data-quote="Sgthooligan" data-source="post: 16564920" data-attributes="member: 181236"><p>I know this is an old post. I’ve been having belt problems for a while and I’m getting ready to go through everything. Right now I’m on a 75mm with 90 mm idler and the Hasty bracket. I just added the heavy duty tensioner and raced one time and belt stayed on. Loaded car in trailer and next day I start the car and there was some knocking and the belt started to walk off of the SC pulley. </p><p>So I’m taking it all off and starting from scratch. I debating on going to a 72 mm or even a 69mm . Does the 69 require a shorter belt? Does anyone know where I can order some shims ? I need to get the wobble out of the idler pulley. </p><p></p><p></p><p>Sent from my iPhone using svtperformance.com</p></blockquote><p></p>
[QUOTE="Sgthooligan, post: 16564920, member: 181236"] I know this is an old post. I’ve been having belt problems for a while and I’m getting ready to go through everything. Right now I’m on a 75mm with 90 mm idler and the Hasty bracket. I just added the heavy duty tensioner and raced one time and belt stayed on. Loaded car in trailer and next day I start the car and there was some knocking and the belt started to walk off of the SC pulley. So I’m taking it all off and starting from scratch. I debating on going to a 72 mm or even a 69mm . Does the 69 require a shorter belt? Does anyone know where I can order some shims ? I need to get the wobble out of the idler pulley. Sent from my iPhone using svtperformance.com [/QUOTE]
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2011-2014 Mustangs
Power-Adders
69mm VMP pulley...how much boost?
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