cfm on a stock s4 n/a and s4 turbo II
Thread Starter
Joined: May 2005
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From: Torrington, CT
cfm on a stock s4 n/a and s4 turbo II
Does anyone have thes cfm specs? it would be a great help or if someone could give me a round about guess of when my t70 would spool (what rpm) .78 a/r compressor wheel and .80 a/r turbine wheel (i think i dont have my spec sheet in front of me)
thanx for all the help
-tea
thanx for all the help
-tea
Rotorhead
Joined: Feb 2001
Posts: 9,136
Likes: 39
From: Charlottesville, Virginia, USA
Hehehe, you first buy one of the slowest spooling turbos possible, and THEN you ask how much it will lag?
Anyway, for a 13B engine, CFM = 0.0463 * Engine RPM * Volumetric Efficiency
As for when your turbo will spool, it should be spooling at engine idle. If not, then you probably need to replace the bearing or check for damage.
Anyway, for a 13B engine, CFM = 0.0463 * Engine RPM * Volumetric Efficiency
As for when your turbo will spool, it should be spooling at engine idle. If not, then you probably need to replace the bearing or check for damage.
Lives on the Forum
Joined: Feb 2001
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From: n
If this is a real T70 and not one of those Made-In-China crap, it's on the verge of being a little too big for a 13B.
There's too many variables to consider (i.e. turbo exhaust manifold design), but you're not going to get it to spool at anything under 4k...4.5k...5k RPM...without the help of NOS or something similar.
-Ted
There's too many variables to consider (i.e. turbo exhaust manifold design), but you're not going to get it to spool at anything under 4k...4.5k...5k RPM...without the help of NOS or something similar.
-Ted
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