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Re: Stock iron Hemi heads flow potential
[Re: shorthorse]
#1939350
10/26/15 11:46 PM
10/26/15 11:46 PM
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Joined: May 2004
Posts: 12,395
Taxes & Virus's R-US, NY
Dragula
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I Live Here
Joined: May 2004
Posts: 12,395
Taxes & Virus's R-US, NY
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Typically they flow 350-370cfm out of the box even with mild porting....They can flow up to or around 420cfm with someone who is really good like Ray Barton, but I have not seen a set flow that much in cast iron in a while. Above that is usually Stage V territory...
My latest aluminum set flowed 457cfm at .700.....
Last edited by Dragula; 10/26/15 11:51 PM.
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Re: Stock iron Hemi heads flow potential
[Re: Dragula]
#1939389
10/27/15 12:37 AM
10/27/15 12:37 AM
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Joined: Dec 2007
Posts: 12,588
Great Neck,LI,new york
hemi-itis
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I Live Here
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Great Neck,LI,new york
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Block will need some work to clear a 4.5 stroke.This is a megablock with 4.5 arm.
Last edited by hemi-itis; 10/27/15 12:39 AM.
HEMI-ITIS has no cure.
My condition is fully BLOWN!!
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Re: Stock iron Hemi heads flow potential
[Re: cudaman1969]
#1939525
10/27/15 10:52 AM
10/27/15 10:52 AM
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Joined: Mar 2007
Posts: 3,141
tennessee,usa
mattsmopars
master
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master
Joined: Mar 2007
Posts: 3,141
tennessee,usa
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Putting together a Hemi and need some discussion time. 4.5 stroke 4.31 bore 68 block 66 heads. I've read that the intakes ports will flow enough with the extra cubes, but the exhaust look they might not. Is this right and if so what improvements if any can be done to them? Older super stock cam about .700 lift I know curiosity killed the cat , but does your 68 block have a partial vin stamp on it? It should be back by the oil pressure switch on the flange where the bellhousing would bolt up. Thanks Matt
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Re: Stock iron Hemi heads flow potential
[Re: mattsmopars]
#1939617
10/27/15 12:56 PM
10/27/15 12:56 PM
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Joined: Jan 2004
Posts: 8,290
fredericksburg,va
cudaman1969
OP
master
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OP
master
Joined: Jan 2004
Posts: 8,290
fredericksburg,va
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Putting together a Hemi and need some discussion time. 4.5 stroke 4.31 bore 68 block 66 heads. I've read that the intakes ports will flow enough with the extra cubes, but the exhaust look they might not. Is this right and if so what improvements if any can be done to them? Older super stock cam about .700 lift I know curiosity killed the cat , but does your 68 block have a partial vin stamp on it? It should be back by the oil pressure switch on the flange where the bellhousing would bolt up. Thanks Matt Never crossed my mind but I will look.
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Re: Stock iron Hemi heads flow potential
[Re: hemi-itis]
#1939622
10/27/15 12:59 PM
10/27/15 12:59 PM
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Joined: Jan 2004
Posts: 8,290
fredericksburg,va
cudaman1969
OP
master
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OP
master
Joined: Jan 2004
Posts: 8,290
fredericksburg,va
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Block will need some work to clear a 4.5 stroke.This is a megablock with 4.5 arm. Already checked that, rods on the crank clear, will check again by the oil boss. BBC size No telling how many times this block has been through the wash. "Rumors" it's an ex Bob Reed engine last.
Last edited by cudaman1969; 10/27/15 01:08 PM.
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Re: Stock iron Hemi heads flow potential
[Re: Dragula]
#1939625
10/27/15 01:02 PM
10/27/15 01:02 PM
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Joined: Jan 2004
Posts: 8,290
fredericksburg,va
cudaman1969
OP
master
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OP
master
Joined: Jan 2004
Posts: 8,290
fredericksburg,va
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Typically they flow 350-370cfm out of the box even with mild porting....They can flow up to or around 420cfm with someone who is really good like Ray Barton, but I have not seen a set flow that much in cast iron in a while. Above that is usually Stage V territory...
My latest aluminum set flowed 457cfm at .700..... Is those numbers intake or ex.
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Re: Stock iron Hemi heads flow potential
[Re: cudaman1969]
#1939638
10/27/15 01:28 PM
10/27/15 01:28 PM
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Joined: Jan 2003
Posts: 13,369
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,369
Marion, South Carolina [><]
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If I'm not mistaken, my MP aluminum hemi heads are basically just aluminum versions of the factory iron heads.
MCH cnc ported them and they flow 429.5 cfm intake and 283 cfm exhaust w/ a tube.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Stock iron Hemi heads flow potential
[Re: an8sec70cuda]
#1939652
10/27/15 01:47 PM
10/27/15 01:47 PM
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Joined: Jan 2004
Posts: 8,290
fredericksburg,va
cudaman1969
OP
master
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OP
master
Joined: Jan 2004
Posts: 8,290
fredericksburg,va
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If I'm not mistaken, my MP aluminum hemi heads are basically just aluminum versions of the factory iron heads.
MCH cnc ported them and they flow 429.5 cfm intake and 283 cfm exhaust w/ a tube. What size engine, and if you don't mind telling, some particulars. Tying to get some comparisons. Kinda what works and not. My dad, family, lives in Bishopville, how close are you? Any tracks beside Darlington? They want me to move down with them.
Last edited by cudaman1969; 10/27/15 01:51 PM.
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Re: Stock iron Hemi heads flow potential
[Re: cudaman1969]
#1939656
10/27/15 01:50 PM
10/27/15 01:50 PM
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Joined: Jan 2003
Posts: 13,369
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,369
Marion, South Carolina [><]
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If I'm not mistaken, my MP aluminum hemi heads are basically just aluminum versions of the factory iron heads.
MCH cnc ported them and they flow 429.5 cfm intake and 283 cfm exhaust w/ a tube. What size engine, and if you don't mind telling, some particulars. Tying to get some comparisons. Kinda what works and not. 572, 11:1 for pump gas, 276/284 at fifty mild lobe street roller, single dominator, etc. 9.50s at 140 mph on the motor, 8.95 so far on a plate system at 3900 lbs.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Stock iron Hemi heads flow potential
[Re: cudaman1969]
#1939669
10/27/15 02:30 PM
10/27/15 02:30 PM
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Joined: Mar 2007
Posts: 3,141
tennessee,usa
mattsmopars
master
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master
Joined: Mar 2007
Posts: 3,141
tennessee,usa
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Putting together a Hemi and need some discussion time. 4.5 stroke 4.31 bore 68 block 66 heads. I've read that the intakes ports will flow enough with the extra cubes, but the exhaust look they might not. Is this right and if so what improvements if any can be done to them? Older super stock cam about .700 lift I know curiosity killed the cat , but does your 68 block have a partial vin stamp on it? It should be back by the oil pressure switch on the flange where the bellhousing would bolt up. Thanks Matt Never crossed my mind but I will look. That would be great if you could do that and post it. Might be someone's original engine. Matt
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Re: Stock iron Hemi heads flow potential
[Re: cudaman1969]
#1939823
10/27/15 07:34 PM
10/27/15 07:34 PM
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Joined: Jan 2003
Posts: 3,505
DFW
mr_340
master
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master
Joined: Jan 2003
Posts: 3,505
DFW
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"Rumors" it's an ex Bob Reed engine last. Does it have BULLET stamped in by the distributor? I have a Hemi block that I got from Jim Hale years ago, and I believe he got it when he bought the old Banning & Slaughter Hemi Cuda. My understanding is that Tommy Slaughter traded parts with Bullet Bob. I called Bob on it years ago and he said he thought it sounded like one of his old blocks.
Floyd Lippencott IV
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Re: Stock iron Hemi heads flow potential
[Re: cudaman1969]
#1939825
10/27/15 07:40 PM
10/27/15 07:40 PM
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Joined: Jan 2003
Posts: 3,505
DFW
mr_340
master
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master
Joined: Jan 2003
Posts: 3,505
DFW
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Flow data on MCH regular CNC porting on Hemi heads. Jeff had a SS Hemi port that flowed more than this, but cost a bunch more too. I think Jeff improved on these numbers somewhat a couple of years ago after he did my iron MP heads. FYI.
Floyd Lippencott IV
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Re: Stock iron Hemi heads flow potential
[Re: an8sec70cuda]
#1939935
10/27/15 10:08 PM
10/27/15 10:08 PM
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Joined: May 2004
Posts: 12,395
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,395
Taxes & Virus's R-US, NY
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If I'm not mistaken, my MP aluminum hemi heads are basically just aluminum versions of the factory iron heads.
MCH cnc ported them and they flow 429.5 cfm intake and 283 cfm exhaust w/ a tube. Correct...flows the same as Cast Iron 350-370cfm Typically they flow 350-370cfm out of the box even with mild porting....They can flow up to or around 420cfm with someone who is really good like Ray Barton, but I have not seen a set flow that much in cast iron in a while. Above that is usually Stage V territory...
My latest aluminum set flowed 457cfm at .700..... Is those numbers intake or ex. Intake numbers  Exhaust numbers 
Last edited by Dragula; 10/27/15 10:11 PM.
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Re: Stock iron Hemi heads flow potential
[Re: Dragula]
#1940068
10/28/15 01:23 AM
10/28/15 01:23 AM
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Joined: Jan 2003
Posts: 7,494
Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,494
Minnesota
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I have a set of 1968 Iron castings, ported by the late Glenn Knowlton. These heads were done for Chuck Lofgrens entry into the Royal Purple Hemi Challenge, and his engine won. After the contest, the engine was parted out and I bought them and put them on my FAST motor. They flow 420 intake 325 exhaust. They are for sale.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Stock iron Hemi heads flow potential
[Re: 52savoy]
#1940090
10/28/15 02:00 AM
10/28/15 02:00 AM
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Joined: Jan 2004
Posts: 8,290
fredericksburg,va
cudaman1969
OP
master
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OP
master
Joined: Jan 2004
Posts: 8,290
fredericksburg,va
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So what is the vin on the backside.. us '68 Hemi owners gotta know. Numbers I found. Next to oil sending hole- 3 3 8 3 8 0 7 first 3-8 can't tell for sure but does have round tops like 3-8 Oil pan rail at back next to bell- stamped 42624570006 -Maltese emblem. above that 4-16-68 ,block casting date 1-15-68 Front pan rail at timing cover the name WARFEL
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Re: Stock iron Hemi heads flow potential
[Re: mr_340]
#1940091
10/28/15 02:02 AM
10/28/15 02:02 AM
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Joined: Jan 2004
Posts: 8,290
fredericksburg,va
cudaman1969
OP
master
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OP
master
Joined: Jan 2004
Posts: 8,290
fredericksburg,va
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"Rumors" it's an ex Bob Reed engine last. Does it have BULLET stamped in by the distributor? I have a Hemi block that I got from Jim Hale years ago, and I believe he got it when he bought the old Banning & Slaughter Hemi Cuda. My understanding is that Tommy Slaughter traded parts with Bullet Bob. I called Bob on it years ago and he said he thought it sounded like one of his old blocks. Nothing there, ground off a lot, bottom pan rail at timing cover the name WARFEL
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