5T4NG

I'm going to set up an appointment this weekend to get my true duels set up and was curious as to which material you all think is best. Below is a basic breakdown of the 3 options the shop i'm going to offers. http://www.mandrelbend.com/default.asp

Thanks!

FoxGT

Personally I would go with aluminized primarily because of cost & there's not much of an added benefit. I always used aluminized for most of the pumbing I do from headers back or turbo back. I wouldn't use it on headers though.

FrankenStangNPD

I have always had better luck with aluminized pipe. 304 and 409 seem to crack easily if there is any weight or tension put on it while it is very hot. Aluminized is less durable to heat and corrosion than 304/409 but has better strength (at lower temps) and costs less. I would be willing to bet that stainless will crack before aluminized has any structural rust. Obviously you wouldn't use aluminized on a header or where there is alot of salt on the road.

FrankenStangNPD

I have to ask...why is there a picture of an eaton m90 supercharger in your sig? Your sig says 500HP.....with an M90? Just asking! Find a pic of a m112 or something. Sorry just busting your *****...LOL

Seriously I hope that didn't come off the wrong way.

5T4NG

I live where in the winter there is a **** ton of salt. better to get 304 or 409 u think? I really dont want it to rust.

FrankenStangNPD

With alot of salt around you may be better off with stainless.

FoxGT

I haven't had any trouble with aluminized. It should hold up fine for quite a few years. Even in the worst conditions I would say you're good for 5. You could also have it coated. The big issue with it is once the coating wears off it starts to rust like mild steel. If you're wanting something that's going to last for a long long time I'd say the ss is the way to go.

I actually don't own a supercharged car atm. The m90 in the picture was actually going on a 5.0. I was building the kit & wiring it with a standalone for someone else. Personally I favor roots superchargers over twin-screw & centri's because of how they work & the power range, I don't really think you can beat the feel of one. When it comes down to it though I keep going turbo for some reason. The roots & twin screw route makes the car feel faster because it's instant power, but the turbo makes the car faster. I guess when it comes down to it I want to be the faster person in a race. I've been meaning to build a kit for one of my own cars, but I end up thinking that maybe I'll turbo it instead.
I plan on swapping the 5.0 out of my gt into my notch & putting the 351w into the gt. If I do that I will end up putting a roots on it (or so I say anyway) Ultimately I plan on putting a diesel engine in the notch, but that's very far from being done or even started on (even used those engines aren't cheap)

As for the m90 itself. It's a very capable supercharger & in my opinion one of the better designed ones. The m112 uses long rotors which don't have enough time to fill completely when exposed to air so it takes an efficiency hit there. Modifying the inlet quite a bit will help with this issue. The m90 isn't plagued by that & has a pretty good aftermarket available to help boost efficiency at higher rpm by quite a bit. The only downside I'm not too big on is that most of them out there (from the supercoupe to be specific) are an older design before the use of teflon coating on the rotors to help prevent leakage. In any case, I would run an m90 up to around 400hp before considering an upgrade. They were quite a bit oversized for the supercoupe. They are actually a good size for a stock or mild 5.0. The 4.6 on the otherhand is a different story it turns an extra 1k more rpm & has decent flowing heads. If you're going all out I'd recommend going with the 6th gen roots over the rest, but they're still quite expensive.
To be honest I almost just took a picture of the turbo's i had lined up at the time, but I'm big on s/c kits too.

FrankenStangNPD

Actually I have always used turbos in the past, I have never sc'd a car (although I owned a stock '90 supercoupe). I bought an eaton m90 and started to build a kit for my old mazda mx6 and decided a turbo was a better option. The engine was 2.5 liters, 156hp 9.81 in the 1/8 and completely stock with only 7lbs. the engine made 319 whp 8.29 in the 1/8(w/a slipping clutch). I was sold immediately. I asked about the m90 because I have heard of people blowing them apart trying to make 500hp with them. I'm actually considering going turbo on my 4.6 but there is just something about a roots sitting on top! Don't know what to do.

FoxGT

The stock case isn't very reinforced, same with the m112. Magnum powers made a pretty bulky case for them. Still, I wouldn't push one above 400.

Those kl03's are pretty good running engines stock considering the liters. My first car I ever did anything with was a '96 Probe GT. Not too big on fwd though.

FrankenStangNPD

I'm surprised there is someone on this forum that knows about the KL03's. Yes, the car would have been much better if rwd. There are a few people that have put the kl03 in a miata and from what I hear the motor is even more capable like that, which doesn't surprise me since my car spun badly even w/ slicks. I'm done with anything smaller than a v8 now though.