Wheres the whine?!

 

It does have a unique sound to it though and I prefer it to the sound of the Eaton. Ask Longboard of what he thinks of the sound since he is driving it daily.

 

Not going to get it from a Centrifugal.
Maybe if you used a ribbed belt and a cogged pulley.


GMC 6-71 anybody

 

Maybe we can include a CD of Flight of the Valkyries?

 

Hmmmm...lose the M45 whine or (nearly) 300 HP?? Let me think....

Bryan is going to bring his car to Cars and Coffee this Saturday, there will be several first hand reports on how it really sounds.

 

u can get PSHHHHHHHHHHHHHHH (well similar to that..)
of turbos instead of whines.

 

Very much so!

I drove the car to work today and the sounds are very different and very cool. When taking off at slow speed you here a slight SC whistle. Once you get on it the deeper and louder the "turbo like" sound gets. Its a little hard to explain but there is allot of air moving very fast.

I will record it as soon as I can.

Longboard

 

I did and still don't see that my question was inappropriate and in any way requests secret data disclosure. My question of when you saw the "strong" pull" via rpm as opposed to boost was for discussion only and not me trying to poo poo Jan or this project in anyway.

Centrifuge chargers (as pointed out by DocO in MCsquared) have a reputation of underperforming at the lower end and over performing at the top end (as compared to eaton type) and I was curious on what you saw on your car as it is currently set-up. Clearly pulley size will influence or determine when this "strong pull" occurs. Like with the eatons today, I expect that a variety of pulleys could be used for street, track, ect... .

I appreciate that you want to ensure that this thread doesn't get out of hand like others have on NAM but at the same time this is Board in which discussion is the objective. Perhaps the problem is that this started as a personal thread and is now a vendor thread and I didn't realize it.

So, I pose my question to Jan - in this early development stage at what RPM are you seeing the positive aspects of the Rotex kicking in. Are you seeing any of the "generic points" commented by DocO in the McScquared Articule regarding centrifuge chargers.

 

Great question Bart,

We are just in the infancy of the testing and until we get a tune on it we don't know which pulley we will finish with. There will be multiple setups for this application like street , street/track and track only versions with applicable injectors and tunes. Longboards car falls into the middle version so we will try and get something acceptable to both situations.
thanks for asking

Expect more data in about 2 weeks if all goes well and the right parts show up

 

Jan is going to offer a CD w/ supercharger whine for those that need it or miss it too much.

Now I'm giving away confidential data

 

lol

 

Bart, the Rotrex is of a very different design than the more common Vortech or Paxton centrifugal superchargers.
Like you said, pulley diameter will probably determine where the power comes in, but from reading the Rotrex site, I don't think they are as "high strung" as the average centrifugal.

Just kick back and relax at the poolside bar, and wait for Jan to complete the testing and dynos. If it turns out to be worthwhile as far as price and power, i'm sure he'll want to share the results.

 

PARTSMAN,

Excellent reply, I couldn't have said it better myself.

Longboard

 

Thanks.
I'm actually waiting to see some Rotrex numbers from a car that is not as heavily modded as yours.
While your car is the test bed for this, it has some high dollar hardware on it that not everybody will cough up the dough for.

In the quest to reduce underhood heat and IATs, the Rotrex seems like it may fit in.

 

I understand that and that is why I asked a very simple and generic question - has he experienced any of the centrifugal fame. And I have already corresponded with him.

 

I agree. As with all the different projects going on right now, this one from RMW, RMW's Jesus head, Fireballed's Mary project, M7's M62 project, and i'm sure there are others. That this would be a good time to sit back and watch how it all pan's out. That being said " I WANT ONE" .

 

Man all of this sounds great. I cannot wait until the weeks go by and we see the final product/numbers.

 

Yeah i heard about that, but i was actually talking to a company called TTS who were doing a rotrex conversion for the civic type R, an having great results.

http://www.tts-performance.com/civicsupercharged.php

Off topic i know but the cars good Henry is getting to a simlar stage as yours was before it went pop, minus the head an cam. So im about as far as i can go without those, oh an fix my poxy exhaust system which is causing a restriction

 

Just got back from Cars and Coffee in Irvine and saw (and heard) Bryans Project X-300 car. Very impressive, but sorry no pics as I forgot to charge my camera batteries!! Maybe someone else will post some pics.

It looks almost stock, the Rotrex is a very small device about 4" in diameter, belt driven off the left side of the motor. It idles cleanly and sounds great, but no SC whine. Runs so cool that a stock intercooler will work OK with it. Runs great on 91 octane gas. Bryan said 34 MPG, but once you change injectors, the computer generated numbers don't work. Jan is still tuning, so no dyno runs yet. So far, this thing looks like a winner.

Bryan, nice to meet you and your lady - oh and your car too!! Good luck and can't wait to see the final results!!

 

we will be dynoing at least 3 cars in the next two weeks as there is much going on at RMW. we are still waiting on hardware for this car

 

Did you get a ride in that beast?

 

jeffc -
Not this morning, no. Bryan got there a bit later than us and by the time we were done talking, he had to take off to get some new brake rotors put on. He is close to the Cars and Coffee spot in Irvine, so maybe next week.

Hopefully, we will get some pics of the cars there this morning on NAM. Every Saturday morning is just an amazing car show and best of all - it is free!! If anybody is visiting Southern California, you need to come to Cars and Coffee in Irvine. Check out this link - http://www.autoworksphoto.com/Automo...0Events/265910

 

It was nice meeting you and the rest of the guys. I believe you are all SCMM members correct? Cars and Coffee has to be one of the best meets in the county.

I am very excited about this kit. Other then a few short drives,I haven't driven the car that much. As Jan said, we are waiting on a few things. After I left cars and coffee, We drove up to MiniCorsa to see Danny for brakes. It's about a 100 mile up and back trip from my house. We drove all over Beverly Hills and Hollywood before we headed back and the car just felt great the whole time. I really am looking forward to the next couple weeks!

The only down side of our trip today was having to stop at Rodeo Dr for the wife. With what I have been doing lately I can't say a word.


Longboard

 

keeping the wife happy is as important as finding more mods for the car. This project sure has been fun and I think the coming weeks will be even more fun with the planned upgrades

 

I can design sex toys too..