Re: More 440 Iron Head DC Stage IV Heads
[Re: 938-DAN]
#2722941
12/10/19 01:05 PM
12/10/19 01:05 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,531
So. Burlington, Vt.
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The biggest advantage imo would be that you’re not starting out with a core that’s already been heat cycled 100,000 miles worth.
The down sides are, they’re supposed to be used with intake rockers that have more offset than std heads use, and they don’t have particularly good lower lift flow on the intake side, since there is no height on the short turn.
I found the exhaust port to be tough to get good numbers out of for the amount of work involved.
Imo, I didn’t like them as well as stock heads, but on a rather high effort type build where you really needed some extra volume....... they are a little bigger than a std head....... so that might pay off.
The “If it were me” answer is........ find someone who wants them...... and take whatever you get for them and apply it to new aluminum heads.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: More 440 Iron Head DC Stage IV Heads
[Re: 938-DAN]
#2723053
12/10/19 06:43 PM
12/10/19 06:43 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,719
Bend,OR USA
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A friend of mine ran a set of them on his S/G car, that was a long time ago in the mid 1980s, you'll be a lot better off buying a new set of modern aluminum heads now if you want more power and performance than the stock heads had
Last edited by Cab_Burge; 12/10/19 06:44 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: More 440 Iron Head DC Stage IV Heads
[Re: elmor353]
#2723421
12/12/19 11:17 AM
12/12/19 11:17 AM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,531
So. Burlington, Vt.
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Here’s a “YMMV” story......
One of my customers had a very low use set that had zero porting, and a fresh VJ done at Barton’s for 1.81/2.14 valves, along with 16 newly installed bronze guides.
They wanted to put them on a FAST stroker build. I ported them, they put the motor together and ran it.
The car ran pretty good, but after a handful of trips to the track they started getting nervous about not using the correct heads, so they had me do some 906’s to replace them. They weren’t happy with the idea of losing power with the head swap, but iiwii.
They brought the motor here and we did the head swap on the dyno. Both sets of heads had the same valves and springs...... both flowed 280cfm. My recollection is the 906’s made about 30hp [i]more[i/] than the stage iv’s on that particular motor, and the car ran a bit quicker with them too.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: More 440 Iron Head DC Stage IV Heads
[Re: 938-DAN]
#2723472
12/12/19 02:53 PM
12/12/19 02:53 PM
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Joined: Feb 2004
Posts: 1,093 Long Beach, CA
Mike Swann
super stock
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super stock
Joined: Feb 2004
Posts: 1,093
Long Beach, CA
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Went 10.10/137 at Palmdale (LACR) with a 470/stage 4 in a Duster in the mid 90's. That would translate to 9.60-9.70/140 at sea level on a level track. You need someone that knows how to port the heads.
Last edited by Mike Swann; 12/12/19 02:53 PM.
8.30's @3400 lbs
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Re: More 440 Iron Head DC Stage IV Heads
[Re: Mike Swann]
#2723475
12/12/19 03:16 PM
12/12/19 03:16 PM
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Joined: Jan 2003
Posts: 4,806 Moved to N.E. Tennessee
GomangoCuda
master
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master
Joined: Jan 2003
Posts: 4,806
Moved to N.E. Tennessee
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. You need someone that knows how to port the heads. Ok, I'll bite. Who might that be?
In theory, there is no difference between theory and practice. In practice, there is.
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Re: More 440 Iron Head DC Stage IV Heads
[Re: LaRoy Engines]
#2723952
12/14/19 11:43 AM
12/14/19 11:43 AM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,531
So. Burlington, Vt.
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I haven’t seen a set in 15 years........ but how I remember them is...... they’re a little bigger than stock heads, but I didn’t feel as though the shape of the port was anything special. The floor was basically flat, with almost no height at the short turn.
They completely reshaped the intake port for the stage V.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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