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Old 10-20-2001, 10:55 PM   #1
22B or not 22B
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Default Turbo rpm

I am working on a little project and I was wondering what rpm range turbos run at when they reach full boost. I did a search and could not find anything about it . Sorry for my ignorance but any info or a good site to check out about this topic would be great.

Thanks for any info

Jeremy
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Old 10-20-2001, 10:58 PM   #2
kaos200
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Default Re: Turbo rpm

Quote:
Originally posted by 22B or not 22B
I am working on a little project and I was wondering what rpm range turbos run at when they reach full boost. I did a search and could not find anything about it . Sorry for my ignorance but any info or a good site to check out about this topic would be great.

Thanks for any info

Jeremy
I would imagine it varies depending on what your "full boost" level is?
What little project? hmm?
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Old 10-20-2001, 11:00 PM   #3
22B or not 22B
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lets say I want 10-12psi

and it is a secret
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Old 10-20-2001, 11:02 PM   #4
Eric SS
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swap and N20. gone. : (

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Which turbo? that is the main thing that determins when you will hit full boost

Eric
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Old 10-20-2001, 11:20 PM   #5
22B or not 22B
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lets say I want to go with a T3/T4

Last edited by 22B or not 22B; 10-20-2001 at 11:25 PM.
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Old 10-20-2001, 11:39 PM   #6
Eric SS
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You should get full boost around 4,000rpm's I believe

Eric
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Old 10-20-2001, 11:56 PM   #7
kaos200
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ahh see the whole time I thought you meant the rpms of the turbine... lol
on my last turbo I got full spool (10psi) at somewhere around 3,200 to 3,500 IIRC.
Dunno what the new setup is just yet. Although I have an idea
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Old 10-21-2001, 12:37 AM   #8
Andrew
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Quote:
ahh see the whole time I thought you meant the rpms of the turbine

was thinking the same thing.
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Old 10-21-2001, 01:23 AM   #9
bsquare
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It depends on a LOT of factors: trim level of the turbo, vane counts and profiles, exhaust flow, intended power level of the engine (the metric is not psi, but cfm), etc. This is why turbo sizing is such a black art.

There was a lengthy article on the topic in a recent issue of SCC.


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Old 10-21-2001, 02:30 PM   #10
22B or not 22B
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I did mean turbine rpms. Sorry for being so nonspecific in the first post. I am just looking for an rpm range (do they spin faster than engine rpms?). I heard that you don't actually build boost until the car is moving (it has to have a load on it), is this correct? So if you launch from like 4000 engine rpms you are not getting extra power.

again sorry for my ignorance

Jeremy
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Old 10-21-2001, 06:01 PM   #11
bsquare
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The turbine itself can spin in excess of 100krpm, so it is going much faster then the engine rpm.


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