Lightweight rotor pack

**SgtMarshal** · 09-22-2014

I found a place that will drill a rotor pack to decrease the overall weight. they claim to be able to make 23 lbs of boost. it is pretty expensive, but that is a lot of boost. He can't do it now because the machine is broken, but he has said he could do an M90 rotor pack. I'm just wondering what you guys think.

**chamberlain198437** · 09-22-2014

Sounds interesting id like to see it. Is it someone in your local area?

**Sven the Sexman** · 09-22-2014

I don't think the rotor weight is a huge cause of inefficiency...however the SC design sure is. The design of the 3 rotor roots blower is inefficient and regardless of what "boost numbers" they claim, the heat generated is going to be through the roof.

**SgtMarshal** · 09-22-2014

I think some of the guys on here know the person who actually does it, I have only emailed a few times. I would think that a lighter weight rotor would increase efficiency because it would take less engine power to turn the rotors.

http://stiegemeier.com/services/lightweight-rotors/

**Bio248** · 09-22-2014

we haven't seen anyone do it with an m90. you'd be the first.

**CrazyGuy03** · 09-22-2014

Ah yes. The intercooled snout guy

**SnowTh1ef** · 09-22-2014

Try it and tell us! haha

**Jomamma** · 09-22-2014

Thats a pretty ridiculous claim.

You'll never be able to make 23psi of boost with an m90 on this motor. You would have to spin the blower so fast and so far out of its efficiency range the heat generated would cause so much know that it would destroy your engine.

Anyways, how would a lighter rotor pack increase psi in anyway? If anything it would decrease the parasitic draw from the engine spinning the rotors

**blueguy** · 09-22-2014

I can't see how this would benefit anything. I'd think it would weaken the rotor itself...along with more boost?

I don't know how that works either since that's dictated by the pulley size. Now it might spin quicker, or feel more "free" revving.

*edit*

Lowboy mcred beat me to it.

**SgtMarshal** · 09-22-2014

I am only quoting what he says on his website. You are probably right that 23 lbs of boost with an M90 is impossible. His machine to do the drilling is broken right now so the service is not available. I am willing to try it, but I dont have the money for it now. I am more curious to try it because not very many people have done it.

the benefits are all derived from decreasing the rotating mass of the rotor pack.

**CrazyGuy03** · 09-22-2014

I would take what he says with a grain of salt.
Everything he claims has yet to be tested in our 3800 community.
If he was willing to drill some rotor packs free of charge and let us test them , sure why not
It doesn't cost him anything but time and a drill bit. If it works, it will pay off for him and us