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525SC Weiand 177 On A 454 MAG in Formula 242LS

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Old 06-09-2011, 10:38 AM
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After a complete engine rebuild I am now getting ready to put the motor back in the boat. The tensioner on the supercharger is on the left side when facing the front of it at about the 7:00 postion. The spring tension forces it down instead of up so there is no belt tension. How can this be the spring should push it up to the 11:00 position to tighten the belt correct? This should be a simple thing am = ?issing something I see no way to flip the spring or put tension on belt withou turning snout so tensioner is on right and that will look stupid and is obviouly not right? Any ideas? Thanks.
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Old 06-09-2011, 10:50 AM
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It sounds like the snout is clocked wrong. There are dowel pins, maybe it is installed 180* off of what it should be. The big ss bolt that holds the torsion spring end to the snout should be at 11 oclock.

Last edited by blue thunder; 06-09-2011 at 10:54 AM.
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Old 06-09-2011, 11:23 AM
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Spring tension is still the wrong way though......it either pushes down on lower left or up on top right? Weird
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Old 06-09-2011, 11:31 AM
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It sounds like the spring might be on backwards. Pull it off and flip it around. The tension should push up.
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Old 06-09-2011, 12:17 PM
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I don't think the spring can be installed wrong and still mount up. A pic of the setup would help us help you.
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Old 06-09-2011, 01:41 PM
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I don't think the spring can be reversed because then the part that fits in the tensioner will be facing the supercharger. If someone has a cell or email i can send pics i cant post them on here . Thanks
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Old 06-09-2011, 03:40 PM
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I can't post pics on here either but if you email to me I might be able to see what you have wrong.

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Old 06-12-2011, 10:34 PM
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The snout was turned the spring tension was correct turned the snout and all set now. I spent all weekend working on it almost ready to start it.................finally.
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Old 06-16-2011, 09:12 AM
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Finally I am almost ready to start the motor. Its been totally rebuilt I'm running the speed pro L2377 forged pistons and the 90767 b&m lower cam. Inconnel exhaust valves and stainless intake valves . Currently I have a 7" lower and 3.5" upper lower pulley. What timing should I run? Also have a 3" upper blower pulley could I run that and with what timing and any idea on approximate hp for each and how safe? Thanks.
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Old 06-16-2011, 09:14 AM
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i think i'm around 7.75:1 compression with those pistons and the 118cc stock mag heads?
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