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The Terminator
Terminator Talk
Eaton Supercharger Porting Comparison: Boost or Pulley
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<blockquote data-quote="cobracide" data-source="post: 8898999" data-attributes="member: 4644"><p>There are a couple ways we can attempt to "equalize" different ported superchargers to acertain which one makes the most power.</p><p></p><p>1) Use the exact same pulleys on each supercharger and assume that the gearing for each is exactly the same. This would also then assume that the rotational speed of the supercharger is exactly the same for each. Would these assumptions be correct? I doubt it since the sieg. sb TM has been shown to probably have a front snout re-gear. This would invalidate this method of evaluation. Since we are unsure, let's move to option (2).</p><p></p><p>2) Match the boost levels on the superchargers. </p><p></p><p> You bring a valid point on the upper - lower comparison. A front nose re-gear would be equivalent to an upper only pulley. So, with that in mind - I suggest that we would keep the equivalent lower pulley on all superchargers and use the upper pulley for matching the boost levels. There is no doubt that it would be encouraged to use a 2 or 4 lb lower because most people with a port are using some sort of lower pulley. A full comparison would dyno all the superchargers at different boost levels. I know this is not really possible so there would have to a boost level chosen. I was thinking 15.5 lbs would fall right around the middle of where most people are with ported setups (15 - 16 lbs). </p><p></p><p>Does that make more sense?</p></blockquote><p></p>
[QUOTE="cobracide, post: 8898999, member: 4644"] There are a couple ways we can attempt to "equalize" different ported superchargers to acertain which one makes the most power. 1) Use the exact same pulleys on each supercharger and assume that the gearing for each is exactly the same. This would also then assume that the rotational speed of the supercharger is exactly the same for each. Would these assumptions be correct? I doubt it since the sieg. sb TM has been shown to probably have a front snout re-gear. This would invalidate this method of evaluation. Since we are unsure, let's move to option (2). 2) Match the boost levels on the superchargers. You bring a valid point on the upper - lower comparison. A front nose re-gear would be equivalent to an upper only pulley. So, with that in mind - I suggest that we would keep the equivalent lower pulley on all superchargers and use the upper pulley for matching the boost levels. There is no doubt that it would be encouraged to use a 2 or 4 lb lower because most people with a port are using some sort of lower pulley. A full comparison would dyno all the superchargers at different boost levels. I know this is not really possible so there would have to a boost level chosen. I was thinking 15.5 lbs would fall right around the middle of where most people are with ported setups (15 - 16 lbs). Does that make more sense? [/QUOTE]
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Eaton Supercharger Porting Comparison: Boost or Pulley
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