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Re: 572-13 FLOW NUMBERS
[Re: Old School]
#295853
04/22/09 11:31 AM
04/22/09 11:31 AM
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Joined: Jun 2005
Posts: 1,283
Colorado,U.S.A
4404dart
pro stock
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pro stock
Joined: Jun 2005
Posts: 1,283
Colorado,U.S.A
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Quote:
I HAVE A PAIR OF 572-13 365 CNC HEADS FOR MY 580" MOTOR.INDY SAYS THEY FLOW [Email]395@.700[/Email] 399@ .800. I HAD MY SHOP CHECK THEM FOR ME,AND THEY ARE NOT CLOSE.THE SHOP SAID THEY HAVE ALOT OF SWIRL IN THE HIGHER LIFTS.THEY ARE NOT DONE YET BUT THE PRELIMARY NUMBERS ARE 369@ .700 AND 360@ .800.WE ARE GOING TO CHECK WITH INDY TO SEE IF WE ARE MISSING SOMETHING,OR NOT DOING SOMETHING RIGHT.MY CAM WITH 1.7 ROCKERS IS AT .800" I CHANGED FROM 1.55 TO GET MORE FLOW.DID NOT EXPECT THE FLOW TO DROP.DO ANY OF YOU GUYS HAVE ANY REAL WORLD FLOW NUMBERS FOR THEESE HEADS? DO THEESE SOUND RIGHT? THANKS FOR ANY INPUT. 
I am feeling your frustration! I bought some used 572-13's this winter, and just got them back from the machine shop, where I had them flowed also. My CNC EZ heads flowed 350 from Modern, and they flowed 320 something at this shop. With a 2.35 intake valve the 572's flowed just under 370 at .650, and by .750 were below 350? I was disappointed to say the least. We'll work on them this winter, but I had to take them, and get the car running. The exhausts were ok at 270 without a pipe. 
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