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How Much Airflow Am I Actually Taking In?? Experts??

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Old 06-05-2006, 09:34 PM
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Default How Much Airflow Am I Actually Taking In?? Experts??

My twin turbo LS1 makes 751 RWHP on only 14 psi on 93 octane.
I am purchasing 2 new turbos and am just curious as to what you think as to how much AIR my motor actually consumes. Seems pretty efficient to me? I need to make sure my turbo purchase will actually make a + difference in overall power throught the range. I need MAX EFFICIENCY, It is only a 93 octane motor, I run 16 psi most of the time on the street (800 ish RWHP)

Every airflow calcualtion chart varies.

-346"
-TEA stage 2 heads
-224 duration .580 lift cam
-Twin 60-1 HI-FI, P-TRIM turbos
-T400/12 bolt
-At ambient temp of 80 I see about 90-95 degrees on the intake temps on a full pass.

Any opinions??
Old 06-05-2006, 10:22 PM
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What rpm are you making the 751 and 800ish rwhp at? I will get back to you with an efficiency number once you say that.
Old 06-05-2006, 10:45 PM
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I run to about 6500 rpm. Made 751 rwhp at 6100 rpm. My 800 rwhp would probably be at 6100 also.
Old 06-05-2006, 11:22 PM
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100lbs/minute.

What's the IC specs? 15 degree delta is impressive.
Old 06-06-2006, 04:08 PM
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It ia a spearco 1500 cfm core. Works amazing!
Old 06-06-2006, 10:32 PM
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I was thinking around 95lbs/min at the 800rwhp level. It's a general rule that 1lb/min of airflow = 10 flywheel hp if I remember correctly. I'm just guessing about the drivetrain loss though.

Your combo is one of the most effiecient I've seen on the VE calculator page I use. It's showing a VE% of 100% with that amount of boost(depends on actual airflow numbers though). Seems like your combo is already really good.
Old 06-08-2006, 10:19 AM
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I'd like more info on your intercooler setup.
Old 06-08-2006, 04:19 PM
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If I remember right, I bought a 2-182 Spearco Core and built my own end tanks. It works amazingly well and never even gets warm.

It's funny. Last year on my 1st pass, I had intake temps of 138 degree. I put the air filters in a cool area instead of right behind the radiator where the turbos are, and It dropped almost 50 degrees!!!!
Old 06-08-2006, 09:09 PM
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Hmmm pics?
Old 06-08-2006, 10:10 PM
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You can see the intercooler inn these 3 pics. Oh yea, It is HUGE.









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