What size belt do I need for a Evosport 168 mm pulley?
07-28-2010, 04:03 PM
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03 E55
What size belt do I need for a Evosport 168 mm pulley?
Hey guys, I just purchased a 168 mm pulley and need to know what size belt I need to run this dude. Ive emailed evosport, but they havent responded. Thanks alot!
-Mason
-Mason
07-28-2010, 04:25 PM
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For reals??? I was thinking because the pulley was the larger that I would need a little bigger belt... But I dont know, so thats why Im asking you guys. Ha
07-28-2010, 04:55 PM
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2003 E55 & 2014 GL550
Pretty sure 168 uses the stocker.
She'll be tad tighter but that's actually a good thing.
Klee is a 168 and she uses stock belt.
You are fine
She'll be tad tighter but that's actually a good thing.
Klee is a 168 and she uses stock belt.
You are fine
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07-29-2010, 06:37 AM
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07-29-2010, 02:24 PM
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Please call us for assistance. Are you referring to accessory belt or supercharger belt? Either way, please call us as the answer will depend on a couple of variables.
07-29-2010, 03:24 PM
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The 168 is the original Kleemann size and they say stock belt works great.
Heck I had the Kleemann pulley on for years and the stocker was great.
Anything larger and you gotta move up in belts.
07-29-2010, 06:09 PM
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2005 S55 1982 300dt
I think dyno's point is that stock belt + larger crankpulley = tighter belt, true, but a belt that is contacting less of the supercharger pulley hence more slippage.
07-29-2010, 06:59 PM
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we should wait the answer from the OP, after he talks with evosport,
but we can discuss it more deeply, just for shake ..
so, first thing, having a belt tied tighter than it was designed is not good for the health of all bearings of other pulleys, the SC and even the crankshaft.
not only this is a cause of premature failure of the weakest pulleys , like idlers, but especially, it's not good for the overall balance and dampening of all those organs.
with a bigger crank pulley, the tensioner cannot quite play anymore and it stays lifted up. therefore the belt has less contact onto the SC pulley.
the contact surface of the belt with the crank pulley is, roughly, one third of its circumference. hence, as diameter is 1/3.14 the circumference, we can consider the delta in diameter of different pulleys as a good approx of the delta in belt lenght required.
Stock belt is 1289mm long.
Stock pulley is (roughly) 151mm diameter
168mm pulley means a delta of 17mm compared to the stock one
JAG belt is 1305mm
i.e. 16mm longer than stock belt.. quite close for keeping things like stock.
I use it for my pulleys within 170mm dia
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