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Select Turbo Size

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Old 04-07-2012, 09:56 PM
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Lets say 350ci redline of say 6000rpm.

Thats 516cfm (at 85% VE)
Say 8lbs of boost. Pressure Ratio of 1.55.
So at 8psi would need 800cfm.

So what turbo would work well with this?

A T76 would fall directly on the 70% efficiency line.
Old 04-07-2012, 10:07 PM
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4788 or a 80mm would be my guess..
or twin 62-67
Old 04-07-2012, 10:12 PM
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Now in regards to determining what you would use for twins how would you go about selecting those?
Would it be half the airflow but the same pressure ratio?
So ~30lbs/min at 1.55 PR?

A Y2K T-80 would fall into 70% island.

Last edited by F0x Slaughter; 04-07-2012 at 10:20 PM.
Old 04-08-2012, 11:05 AM
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Originally Posted by F0x Slaughter
Lets say 350ci redline of say 6000rpm.

Thats 516cfm (at 85% VE)
Say 8lbs of boost. Pressure Ratio of 1.55.
So at 8psi would need 800cfm.

So what turbo would work well with this?

A T76 would fall directly on the 70% efficiency line.
those borg waner,s 75mm work great 1100 hp if you get the right one that's what i would stick on it
Old 04-08-2012, 11:31 AM
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I looked into twin T61 and they seem they would work great anywhere from 6psi up to 20psi.



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