Weiand 177 boost??
02-09-2010, 01:09 AM
#41
Charter Member # 55
Charter Member
They are just 10 rib serpentine belts. You can them made by Gates or at NAPA. Sorry, I don't recall what size I was using and don't have it written down anymore. You should just be able to take in your current belt and get the next size or two smaller. With a new belt, mine would just barely fit over the pullies. They are only about $40 at NAPA.
02-09-2010, 01:15 AM
#42
Charter Member # 55
Charter Member
Sorry Guys. I started this thread, and my info was all wrong. For some reason, I thought it had the smaller pulleys. I have the 3.25 top, and 7" bottom. Measured them today. So seems i am not far off!
My engines are basically 525SC's, with dart alum heads, pretty agressive roller cams. With my current props, I only turned about 5000-5100RPM. I plan to spin them to around 5300-5400, as they really make quite a bit more power as the RPM's increase (cams). Good thing is that even with my current pulley, at 5400, Im spinning the blower at 11,718 RPM. If I went to a 3.05 pulley, i'd be at 12420 rpm. Im debating what would be better, spinning the engines say at 5600RPM, or at 5300 but spinning the blower faster..
My engines are basically 525SC's, with dart alum heads, pretty agressive roller cams. With my current props, I only turned about 5000-5100RPM. I plan to spin them to around 5300-5400, as they really make quite a bit more power as the RPM's increase (cams). Good thing is that even with my current pulley, at 5400, Im spinning the blower at 11,718 RPM. If I went to a 3.05 pulley, i'd be at 12420 rpm. Im debating what would be better, spinning the engines say at 5600RPM, or at 5300 but spinning the blower faster..
Several companies make them. Price varies from about $1500 for a superchiller to over $3000 for a Whipple. With a smaller pulley and chiller, you would probably see about 50-60hp.
02-09-2010, 06:54 AM
#43
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Thanks for all your help Griff and everone else too.
02-16-2010, 09:56 AM
#44
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Thread Starter
Any of you guys know...My front cover has a oil leak. I have replaced the rear bearings and cover seals, but never had the front apart. I need to replace the gasket to fix the oil leak, but not sure if the rotors/gears will need to be re-timed or whatever. Is this simple or should i bring it to a blower shop. Dyers blowers is 10 minutes from my house.
02-16-2010, 07:16 PM
#45
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Join Date: Nov 2005
Location: Wayland, MI
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If you have doubts, take it to Dyers. But,,, Summit has the gaskets and seals. The plates are pinned so it's not that big of a deal if you are mechically inclined. Just take it apart and reassemble in reverse order.
02-17-2010, 03:34 AM
#46
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Thread Starter
I did the rear bearings and seals myself, that was pretty cut and dry. Just not sure if things will get more involved in the front part with the gears in there?
