Pablo

iTrader: (1)

ive seen a few conflicting sources
please post whether the measurement was taken at 3"HG or 1.5"

Mark 89Formula

Here's a few:

TPIS Insider Hints Handbook:
48 mm TB 668 CFM @ 1.5 in-HG (20.4 in-H20)
48 mm w/airfoil 709 CFM @ 1.5 in-HG

Nov 97 GMHTP:
48 mm TB 670 CFM @ ? (no drop given, assume 1.5 in-HG)
52 mm TB 759 CFM @ ?
48 mm & stock plenum 576 CFM @ ?
52 mm & stock plenum 662 CFM @ ?
48 mm & ported plenum 688 CFM @ ?

Pablo

iTrader: (1)

Excellent, thanks mark!


those seem a good bit higher than I previously thought though.. hmmm

Dan87IROC-Z

I think the 48mm TB flows around 650 or so CFM.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission

Current Mods: Edelbrock TES Headers, Hooker Cat-Back System, Performance Resource Chip, 160* Thermostat, Accel 8.8mm Ignition Wires, K&N high flow air filters, gutted air box, gutted MAF sensor, Throttle Body Coolant By-Pass, Homemade Ram-Air, Falken ZIEX Z-Rated Tires.

1/4 mile times without chip:
Best ET: 15.7 @ 89MPH
Best Corrected ET: 14.5 @ 96MPH

ede

the dark side is calling you pablo. next thing you'll be asking about carbs.

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ICON Motorsports