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Cobra Forums
2013-14 Shelby GT500
Pulley size
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<blockquote data-quote="Catmonkey" data-source="post: 16257358" data-attributes="member: 124025"><p>Honestly, I don't think it makes a difference. People argue with me that it does, but the blower ratio doesn't really change where one set up is better than the other. A larger upper would be less susceptible to slipping, but a lower isn't exactly a cheap proposition. An auxiliary idler can get the needed belt wrap on the upper. Even the 10% requires clearance on the timing cover. I'd go to the 2.4" and if you need more boost, get the lower, or better yet apply that outlay to a bigger supercharger.</p><p></p><p></p><p>Unless you can get one used at a decent price, I'd go for the new VMP 69mm twin if you're buying new.</p><p></p><p></p><p>I'd hold off buying any aftermarket mufflers with an off-road pipe, until you get an idea of how loud the car will become. The loss of the cats adds a lot more volume than you can imagine.</p></blockquote><p></p>
[QUOTE="Catmonkey, post: 16257358, member: 124025"] Honestly, I don't think it makes a difference. People argue with me that it does, but the blower ratio doesn't really change where one set up is better than the other. A larger upper would be less susceptible to slipping, but a lower isn't exactly a cheap proposition. An auxiliary idler can get the needed belt wrap on the upper. Even the 10% requires clearance on the timing cover. I'd go to the 2.4" and if you need more boost, get the lower, or better yet apply that outlay to a bigger supercharger. Unless you can get one used at a decent price, I'd go for the new VMP 69mm twin if you're buying new. I'd hold off buying any aftermarket mufflers with an off-road pipe, until you get an idea of how loud the car will become. The loss of the cats adds a lot more volume than you can imagine. [/QUOTE]
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2013-14 Shelby GT500
Pulley size
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