Smaller supercharger for custom system
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Pro
Joined: Jul 2000
Posts: 580
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From: Washington, USA
Smaller supercharger for custom system
I'm just thinking aloud here, so bear with me and I make no claim as to whether this is a good idea.
It seems like the Vortech and ATI centrifugal compressors being used on LS1/LS6 supercharger systems are capable of way more flow than they're having to produce for the Corvette kits. It begs the question of where in the pressure curve these are being run and how close to optimal adiabatic efficiency they're being spooled to. I've heard cases of overboost requiring blowoff valves in some situations. Likely because people decrease the pulley size for low-end grunt, then end up having too much induced air at higher RPMs.
Imagine, if you will, using an ATI C-2 or Vortech V-5 G-trim instead of their larger counterparts. They are smaller compressors with smaller outlet diameters. This makes them easier to mount and easier to plumb both the inlet and discharge tubing. For instance, you could run 2.5" tubing to the intercooler instead of 3" and the inlet is smaller
Granted, the supercharger may run out of steam at the higher RPMs, but that may not necessarily be a bad thing. You get the benefit of a good power adder, but no real risk of overboost or detonation at high RPMs. Seems to me you could build a decent 500-560HP system out of a smaller compressor.
So, for all you forced induction experts out there, am I smoking crack? Won't this work? Looking for some thoughts and information on the subject, that's all.
It seems like the Vortech and ATI centrifugal compressors being used on LS1/LS6 supercharger systems are capable of way more flow than they're having to produce for the Corvette kits. It begs the question of where in the pressure curve these are being run and how close to optimal adiabatic efficiency they're being spooled to. I've heard cases of overboost requiring blowoff valves in some situations. Likely because people decrease the pulley size for low-end grunt, then end up having too much induced air at higher RPMs.
Imagine, if you will, using an ATI C-2 or Vortech V-5 G-trim instead of their larger counterparts. They are smaller compressors with smaller outlet diameters. This makes them easier to mount and easier to plumb both the inlet and discharge tubing. For instance, you could run 2.5" tubing to the intercooler instead of 3" and the inlet is smaller
Granted, the supercharger may run out of steam at the higher RPMs, but that may not necessarily be a bad thing. You get the benefit of a good power adder, but no real risk of overboost or detonation at high RPMs. Seems to me you could build a decent 500-560HP system out of a smaller compressor.
So, for all you forced induction experts out there, am I smoking crack? Won't this work? Looking for some thoughts and information on the subject, that's all.
Racer
Joined: Oct 2003
Posts: 333
Likes: 0
From: COWFORD FL
Originally Posted by ramcharger
It seems like the Vortech and ATI centrifugal compressors being used on LS1/LS6 supercharger systems are capable of way more flow than they're having to produce for the Corvette kits. It begs the question of where in the pressure curve these are being run and how close to optimal adiabatic efficiency they're being spooled to. I've heard cases of overboost requiring blowoff valves in some situations.
It is installed to keep the blower from choking and cavitating on the backpressure when the throttle plate is abruptly closed.
see the vortech site about sizing head units and compressor maps...
