I do have a question about a turbo to centri comparison. I know the turbo works off the exhaust gasses and the turbine can spin anywhere upwards or 50 or even 60 thousand rpms but takes no power from the engine. The centri works off how fast the engine speed is and the size of the pulley, thus it takes some engine power to run. Lets say that they were both set to operate at 15 psi, would the turbines be spinning close to the same speed or would the turbo be faster? And ifwheel HPpower is lower because of the loss created by the supercharger, is there a certain amount of boost needed to have both unitsclose to the same power?

 

1- Err, no. Try more like 200,000~ rpm.

2- The turbo will be spinning faster.

3- It would be directly correlative to how big the turbo was, and how much CFM is was moving. The gap would prolly be quite large though....



EDIT- the 3 was supposed to be a 2

 

to my knowledge the fastest spinning turbos spin around 220,000rpm. the only thing that spins faster is a dentist drill.

yes the turbo will be spinning a lot faster, and i mean a lot.

generally takes a few psi for a centri's power to match the turbos power.

 

How fast do TS's and Roots spin? My Vortech spins at over 60,000 RPM. Stock Vortech systems spin at 53,000 give or take a few RPM's.

Fazm-I've heard the belt driven saying from many a vortech/paxton/procharger techs. It looks just like a turbo, however, operates off of a belt. Yes, they make less power, but, with a few extra PSI, they will make equal power, and are obviously safer and more efficient for the motor. Turbo's require too much damn heat, and need to be cooled. Sure they make power, but they are expensive to maintain.

 

The engine had 135k on the clock - give the old girl a break

But hey - I make more power now and I'm NA. So there!

 

Turbo's make heat and blowers don't? Any decent blower set up is going to need some sort of cooling. Even I ran meth. Compressing air creates heat, so matter how you do it.

 

stock eaton spins around 16k RPM i think and with 2.76 pulley, it spins 19k RPM. I am not sure exactly but must be somewhere around that.

 

Ed, as you know, Turbo's REQUIRE a lot of intercooling. Yes, S/C's require cooling as well, but do not get AS hot. Also, Centri's in particular are not as hard on the motor as the other S/C's and Turbo's. Think about it, something that is spinning 200,000 RPM, will require a good amount of cooling. Something that spins at less then half of the speed, would not create so much heat, and would require less cooling. That was my point.....I think that Yellow Cav is going to your head, you going to be ok?

 

The turbo also gets heat from the exhaust gas that powers it. I have seen my headers glowing and I'm sure that some of the heat from the exhaust gas transfers to the turbo itself. And sorry about the other post I was thinking of a centri blower when I was talking about the 50,000 rpms.

And while we are on the subject, grabber, if I can use your #s to ask a question. Why is it that a centri powered car, or even a twin screw or roots will start to have a lot more wheel Hp than wheel torque when you crank up the boost where as the turbo usually makes great torque? Does this have to do with the parasitic loss of the supercharger?

 

Good question. In technical terms I could not tell you. But, in my opinion, because Turbo's build boost over the RPM's, they typically make more power. TS/Roots, and Centri's get less because it is almost instant boost. Not sure if this makes any sense, but, I understand your question. Anyone else want to jump in on this?