Well i found a big rig turbo from a junk yard, it was 5 bucks and the turbine spins freely, can this be used on a rotary?

You can use it but I would NOT advise it. Deseil turbo are not ment for high rpms. Depending on what turbo it is you can buy a new hotside for it and use it that way otherwise I wouldnt do it.

[quote name='fc3s4utnv' date='May 9 2005, 06:01 PM']You can use it but I would NOT advise it. Deseil turbo are not ment for high rpms. Depending on what turbo it is you can buy a new hotside for it and use it that way otherwise I wouldnt do it.


[/quote]

uh, I would like to hear your explanation of how RPM has anything to do with a turbo spinning when your talking about a diffrent motor.



The only thing the turbo cares about is exhaust flow.

Exactly as psyclo said, depending on how big that turbo is, you might not be able to spool it until HIGH rpms on the rotary.

[quote name='psyclo' date='May 9 2005, 04:13 PM']uh, I would like to hear your explanation of how RPM has anything to do with a turbo spinning when your talking about a diffrent motor.



The only thing the turbo cares about is exhaust flow.


[/quote]

Have you ever worked with desiel trucks, those turbos are meant for high flow low rpm. Some of the Holset turbos you can buy the different hotsides so that they are more compatible.



And rpms and turbos= this turbo is only balanced to _________rpms, so actually it has alot to do with it.

yes and if the turbo is flowing XXX cfm that means it has YYY spindle speed. spindle speed will be the same, at the same pressure, on a rotary as a deisel so long as the flow past the exhaust turbine is the same. A 5+ liter diesel truck will outflow a rotary until the rotary is at a high (usualy very high) rpm.

True is see where you could have misunderstood what I was talking about. I wouldnt want to attempt it either way though.

Is it just me or did this thread get really complicated, really fast? It went from "I got a big truck turbo for cheap, will it work?" to engineering math equations that my english major ass would never understand.

Let's sum this up





Turbo from junkyard off "bigrig"





I work on "bigrigs"







So, exhaust side used to seeing 14.6 L displacement, dropping down to 1.3...





I don't think it'll spool up too fast







Answer = no









If you got it at the junkyard, you don't have the resources to make it work, simple as that



It's another story if you bought it brand new and are prepared to take the neccessary fabricating, and turbine/engine design to make it happen

[quote name='fc3s4utnv' date='May 9 2005, 08:34 PM']Have you ever worked with desiel trucks, those turbos are meant for high flow low rpm. Some of the Holset turbos you can buy the different hotsides so that they are more compatible.



And rpms and turbos= this turbo is only balanced to _________rpms, so actually it has alot to do with it.


[/quote]





Only balanced to like 20,000 rpm





Do YOU ever work with diesel trucks?



The turbo doesn't spin the same rpm as the motor, it spins more



RPM doesn't matter, it's all flow



Trucks have a low powerband so the flow design is totally different. You just think rpm matters.....