Preparing for SuperChargers
01-17-2013, 07:56 PM
#41
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This is key right here.........from that article
The only drawback is that this blower, while conveniently small, is also a bit undersized for the displacement of a stroked big-block. The out-of-the-box pulleys only made 2 psi boost, gaining 82 hp and 70 lb-ft over zero boost. We ordered a 2.85-inch blower pulley (PN 6790, $71) and used it with the stock 6.00-inch crank pulley to make 3 psi at peak. We later tried a 7.00-inch crank pulley for a blower-drive ratio of 2.46:1 and made a peak of 5 psi, good for 749 lb-ft and 700 hp, but the blower had its tongue hanging out. The belt was starting to slip and the case was getting very hot, causing extreme power dropoff in back-to-back pulls
The only drawback is that this blower, while conveniently small, is also a bit undersized for the displacement of a stroked big-block. The out-of-the-box pulleys only made 2 psi boost, gaining 82 hp and 70 lb-ft over zero boost. We ordered a 2.85-inch blower pulley (PN 6790, $71) and used it with the stock 6.00-inch crank pulley to make 3 psi at peak. We later tried a 7.00-inch crank pulley for a blower-drive ratio of 2.46:1 and made a peak of 5 psi, good for 749 lb-ft and 700 hp, but the blower had its tongue hanging out. The belt was starting to slip and the case was getting very hot, causing extreme power dropoff in back-to-back pulls
01-17-2013, 09:42 PM
#42
I agree. Plus we were getting off track a bit. I'd love to bring one of my 420 blowers up for the dyno session though. Since It would bolt on to his intake, and just require some pulley swapping, which I have extras. That would be pretty cool, just wish I lived a little closer to rookie. Kind of a supercharger shoot out , maybe even bolt chillers on and off. Really give his engine a workout!!!
01-18-2013, 11:44 PM
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Great Lakes Engine Dyno Locations
01-19-2013, 08:17 AM
#44
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http://www.orlandiperformance.com/
01-19-2013, 09:05 AM
#47
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Im pretty sure a #3 lower will not physically bolt up to a TRS. I think the #2 lower was its own deal, and not a very good one at that. It was said a regular TRS was stronger than the #2 (TRS upper with #2 lower). I even think the #2 setup was deeper than the TRS.
01-19-2013, 09:38 AM
#48
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I did witness the cut cav plates and satin lowers on close friends TRS boats. And I know the prop shaft was raised because one close friend always had trouble getting on plane.
Ill have to ask more details
03-24-2013, 09:47 PM
#49
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TTT
So I finally got the 2nd engine torn down. Also got a little surprise. 3 lobes were going out. I got it out just in time. I didn't see any issues with this engine. Maybe off 100RPM compared to the other at WOT and cruise right before the 4barrels open.
So I finally got the 2nd engine torn down. Also got a little surprise. 3 lobes were going out. I got it out just in time. I didn't see any issues with this engine. Maybe off 100RPM compared to the other at WOT and cruise right before the 4barrels open.
