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SVTPerformance's Chain of Restaurants
The Blower Bistro
cobra r 5.4....low boost with vortech v7 ysi on
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<blockquote data-quote="Bill Anderson" data-source="post: 11929710" data-attributes="member: 26488"><p>Not really, boost climbed smoothly to 11.6 lbs to 4500, then just seemed to level off all the way to 7k....At 1st it looked as though the mondo bypass was acting like a regulator and bleeding off boost, so I took it off and bench tested it with compressed air and it held tight past 20 lbs...put check valves in all of the vacuum hoses and pcv and moved the IAC connection from the cold air pipe to the discharge side of the compressor.. ...no change</p><p></p><p>At 1st there was some notable belt dust, but that subsided after a couple of pulls. I did mark the belt and pulley, made a pull, and the marks did move out of alignment, but I assume serpentine belts are supposed to have "Some" slippage...</p><p></p><p>I Purchased a couple of different diameter innovator's west balancers (10% and a 15% od) some smaller alternator pulleys (the R came with a 4" and is very close to the 2.7 blower pulley). to go to a larger pulley on the blower, I have to goto a smaller alt pulley for clearance.</p><p></p><p>picked up an assortment of vortech pulleys as well as a reichard racing 2.7 and also have a new tensioner coming from thump racing.</p><p></p><p>I am going to try the reichard 2.7 with the thump racing tensioner 1st, just because once I start going to a larger balancer, I will have to grind the timing cover a bit, and a larger blower pulley will require changing the alt pulley as well as re-designing the water crossover (yep, it is that close).</p><p></p><p></p><p></p><p>All of the ideas given so far are sound ones...getting the most belt contact on the pulleys is the key...it is just a matter of working with it until the the right combo is found.</p><p></p><p></p><p>Thanks for all of the good suggestions, hopefully one of the combinations will get the boost up to where it needs to be.</p></blockquote><p></p>
[QUOTE="Bill Anderson, post: 11929710, member: 26488"] Not really, boost climbed smoothly to 11.6 lbs to 4500, then just seemed to level off all the way to 7k....At 1st it looked as though the mondo bypass was acting like a regulator and bleeding off boost, so I took it off and bench tested it with compressed air and it held tight past 20 lbs...put check valves in all of the vacuum hoses and pcv and moved the IAC connection from the cold air pipe to the discharge side of the compressor.. ...no change At 1st there was some notable belt dust, but that subsided after a couple of pulls. I did mark the belt and pulley, made a pull, and the marks did move out of alignment, but I assume serpentine belts are supposed to have "Some" slippage... I Purchased a couple of different diameter innovator's west balancers (10% and a 15% od) some smaller alternator pulleys (the R came with a 4" and is very close to the 2.7 blower pulley). to go to a larger pulley on the blower, I have to goto a smaller alt pulley for clearance. picked up an assortment of vortech pulleys as well as a reichard racing 2.7 and also have a new tensioner coming from thump racing. I am going to try the reichard 2.7 with the thump racing tensioner 1st, just because once I start going to a larger balancer, I will have to grind the timing cover a bit, and a larger blower pulley will require changing the alt pulley as well as re-designing the water crossover (yep, it is that close). All of the ideas given so far are sound ones...getting the most belt contact on the pulleys is the key...it is just a matter of working with it until the the right combo is found. Thanks for all of the good suggestions, hopefully one of the combinations will get the boost up to where it needs to be. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
cobra r 5.4....low boost with vortech v7 ysi on
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