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Posted:
Fri Jul 30, 2004 8:20 pmby Shawn
Hello,
i saw the pictures of the vortec heads on your site and was wondering if you'd share the info. on them. How large they were, flow, etc..I've never full ported a set and was just wondering how good they get.
thanks,
Shawn
Posted:
Sun Aug 01, 2004 3:16 amby maxracesoftware
with a 2.020/1.600 installed, you should be able to get fairly easy these numbers= (Bowl-worked) casting # 10239906
Lift----Intake----Exhaust
.200----128.1-----111.0
.300----183.3-----149.8
.400----226.7-----175.9
.500----249.2-----189.9
with 2.055/1.600 valves as pictured on my website for 1st Level full-port job you should be able to get around
262 cfm .500" Lift on up to 270-280 cfm
all on a 4.000 Bore Flow Fixture at 28" inches test pressure
the following are for a pair of Legal castings # 10239906 for a Chevy SBC 377 cid legal size engine in a certain Class DragBoat that was slightly faster than MPH record near end of year 2000
1.940 int / 1.500 exh 4.000" Bore Flow Fixture @ 28 inches SF-600
as run shape as it came from Sweden
Lift---Intake---Exhaust
.200--121.4----98.2
.300--179.4----123.8
.400--219.2----137.5
.500--220.8----145.9
after legal 3 angle valve job and anything else you might get away with 
Lift---Intake----Exhaust
.200--134.0----106.7
.300--187.3----141.7
.400--223.1----157.1
.450--234.6---------
.500--220.8----163.1
Posted:
Mon Aug 02, 2004 8:08 pmby SWB
Larry,
Do you have any experiance with the BBC vortec heads? I just wonder if you had any tips for doing the bowl area around the guides on the inlet side?
Thanks,
Sean
Posted:
Mon Aug 02, 2004 9:12 pmby Shawn
thanks for the info. I'm going to do a set for myself for a little truck motor, but haven't ever done anything more than a bowl port to them.Looks like they would fit that application pretty well.
thanks again,
Shawn
Posted:
Tue Aug 03, 2004 2:37 amby maxracesoftware
Larry,
Do you have any experiance with the BBC vortec heads? I just wonder if you had any tips for doing the bowl area around the guides on the inlet side?--Thanks,--Sean
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i've had 1 pair in my Shop for over a year, but never did anything with them..they were given to me.
sorry, i have no flow information on these heads..might flow test the ones i have just to see OEM stock numbers.