Preparing for SuperChargers
01-17-2013 | 07:43 PM
#41
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From: Emmet, WI
Heres a good article/test. They put a 177 up against a 8-71. The baby blower did pretty well, until the RPM went up, then the large blower walks away. Plus the 177 was pretty much maxed out at 3psi on this stroker
http://www.chevyhiperformance.com/te...e/viewall.html
http://www.chevyhiperformance.com/te...e/viewall.html
01-17-2013 | 07:56 PM
#42
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From: chicago
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
#43
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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
#44
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From: Williamston / Grand Haven, MI
Great Lakes Engine Dyno Locations
01-19-2013 | 08:17 AM
#45
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From: LSC, MI
http://www.orlandiperformance.com/
01-19-2013 | 08:53 AM
#46
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From: Oneida Lake NY
01-19-2013 | 09:05 AM
#48
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From: chicago
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
#49
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From: Oneida Lake NY
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
#50
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From: Grand Rapids, MI
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.
