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OK, the motor is in for the last party of the season. Trying not to get in a hurry, but would really like to take it out this weekend. Prob is, I snaped the bolts off holding the pully to the balancer tonight. I am using a BHJ Dynamics balancer, and have a 2 grove pully topped off with the blower pully. Motor is 8-1 comp, running an 8-71 with 52/top and 58/bottom pulleys. Motor is tight, raps good, gave me a woody. On the trailer, the 3 3/8 cap screws that bolt the pully to the balancer broke, and on this balancer there is only the 3 holes. Am I going to need a different balancer for more bolt holes, or will a better grade of bolts do..... Also, on a cold motor, how much slack should I have on teh long side of the belt, with aluminum heads.......
randy
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You need good quality bolts in that aplication. Your bolts are 1/2 the quantity and 3 times as long compared to just bolting a pulley on a blower hub.
Allow about 1"" of deflection on the non idler side of the belt cold. Make sure there is a slight deflection warmed up.
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[QUOTE=Infomaniac]You need good quality bolts in that aplication. Your bolts are 1/2 the quantity and 3 times as long compared to just bolting a pulley on a blower hub.
Yeah, I was sure that a setup like this would be better off with six bolts. I will plan on a better ballancer and elliminate at least one grove from the pully and add the holes. Hey, aren't you a "carb" guy, or do you have a line on someone that can redo and refinish blower carbs? I have 2-1050's from Bigs Performance carbs. I've had um apart for cleanin and new gaskets, but I'm sure that the need to bo done the right way....
Thanks for your input.
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my blower shop 1071 set up uses three bolts to the balancer through the grove pulley and the 8 mm pulley bolts to that using 6 bolts and a blancer bolt
