"The large L92 intake ports do give up some torque at lower engine speeds because of their size, but the peak flow and subsequent peak horsepower numbers are so good, give the GM enginers and their management team a big thumbs-up for producing such outstanding cylinder heads."
From a recent article about testing with these new heads that flow 320 cfm right out of the box.... on a 550 hp 364 cubic inch engine that was tagged as "very streetable".
Again somewhat related. Another quote from a very notable Pontiac person.....
"If you are satisfied with your 467 cid engine running out of breath at
5,200 rpm., by all means, keep your 176cc. ports. If you want to go
faster, more air is required. 176cc. ports on a built 500+ cid. engine
is just as ridiculous as a 250 cc. port on a hydraulic flat cam 400 cid.
engine."
Last edited by Steve C.; 03-10-2007 at 12:47 PM.
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