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The Terminator
Terminator Talk
Stock Idler Replacement
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<blockquote data-quote="CobraBob" data-source="post: 13700145" data-attributes="member: 6727"><p>Most 4-piece kits have either 3 100mm idlers and one 92/90mm idler, or 3 92/90mm idlers with one 100mm. Metco, for example, gives you the choice of 3-100mm and 1-90mm or 3-90mm and 1-100mm. And single or double bearings. As far as why the 100mm size, I've never heard the question raised before. You stirred my curiosity so I tried to call Metco but only got a recording. I might try again later. It's a good question. </p><p></p><p>I see that you don't want an auxiliary idler. Is that because you want to use the stock cage? Because if you go with an upper than is 2.90/2.93 or smaller you want more belt wrap to minimize belt slip and that will require an auxiliary idler. There are people who have gone as small as a 2.76 with no auxiliary idler and they claim no belt slip, but it isn't recommended.</p><p></p><p>EDIT: I've read through a number of threads from the past, and all talk about increased belt wrap with the larger 100mm idlers. I have to belief that belt wrap is the reason for the larger size. There's a reason why you don't see any idlers for the '03-'04 Cobra smaller than the factory 90mm. This comes right from Metco's site. <span style="color: Yellow">"This kit includes a black hardcoat-anodized 100mm idler pulley, <span style="color: SandyBrown">which is the larger size that serves to maximize belt wrap</span> in applications using stock size supercharger pulleys."</span> I would have to assume that this would apply to smaller size supercharger pulleys as well. It's got to be for better belt wrap for reduced belt slippage.</p></blockquote><p></p>
[QUOTE="CobraBob, post: 13700145, member: 6727"] Most 4-piece kits have either 3 100mm idlers and one 92/90mm idler, or 3 92/90mm idlers with one 100mm. Metco, for example, gives you the choice of 3-100mm and 1-90mm or 3-90mm and 1-100mm. And single or double bearings. As far as why the 100mm size, I've never heard the question raised before. You stirred my curiosity so I tried to call Metco but only got a recording. I might try again later. It's a good question. I see that you don't want an auxiliary idler. Is that because you want to use the stock cage? Because if you go with an upper than is 2.90/2.93 or smaller you want more belt wrap to minimize belt slip and that will require an auxiliary idler. There are people who have gone as small as a 2.76 with no auxiliary idler and they claim no belt slip, but it isn't recommended. EDIT: I've read through a number of threads from the past, and all talk about increased belt wrap with the larger 100mm idlers. I have to belief that belt wrap is the reason for the larger size. There's a reason why you don't see any idlers for the '03-'04 Cobra smaller than the factory 90mm. This comes right from Metco's site. [COLOR="Yellow"]"This kit includes a black hardcoat-anodized 100mm idler pulley, [COLOR="SandyBrown"]which is the larger size that serves to maximize belt wrap[/COLOR] in applications using stock size supercharger pulleys."[/COLOR] I would have to assume that this would apply to smaller size supercharger pulleys as well. It's got to be for better belt wrap for reduced belt slippage. [/QUOTE]
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