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Re: 440 rebuild
[Re: KingTuna]
#1669002
09/10/14 03:42 PM
09/10/14 03:42 PM
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Joined: Feb 2014
Posts: 416
Georgia
KingTuna
OP
mopar
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OP
mopar
Joined: Feb 2014
Posts: 416
Georgia
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Quick question. Lets hypothetically say that I decide to stay with stock cast iron heads. How much would it affect performance if I didn't port them? Would simply installing biggers valves help with a nice combustion chamber polish? How well do the stock heads flow up to .500 lift? I'm just trying to look at all angles because right now I will be over budget. I still have to swap the spindles and disc brakes from the New Yorker to the Fury, and rebuild the trans.
2014 Ram 1500 Pentastar V6
1966 Fury II 4 door
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Re: 440 rebuild
[Re: KingTuna]
#1669003
09/10/14 03:47 PM
09/10/14 03:47 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
The New Yorker has the 5 digit speedometer, and it is at 70,000 right now. Car was not parked until 2004, so I'm just going worst case scenario and thinking its more like 170,000. With the valve covers off though, there is nothing that I have seen that scares me. When I take off one the heads it might be a different story though. Good thing is that the motor is free. A little Marvels and a few days wait and she turned right over. I agree with you on the aluminum heads. I believe that is the best way to go. The combustion chambers on the Stealths are also much better than the stock heads as well, correct? I added up the just the major parts alone and right now I am looking at 2,700 dollars. This is the rebuild kit, edelbrock intake, holley 750, stealth heads, voodoo cam & lifters, double roller timing chain, rocker shafts, rocker arms, pushrods. I'm gonna be very happy when this is done but very broke...
for $2700 you can find a mill already built with better parts. I suggest you look at as many used parts as you can. The only thing new I'd spend money on new is a cam and t-chain set along w/ bearings. You can even find good deals on used .030 pistons. Just my $.02 I bought the engine in this car for $3k of of a moparts member.
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Re: 440 rebuild
[Re: KingTuna]
#1669004
09/10/14 08:19 PM
09/10/14 08:19 PM
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Joined: Aug 2013
Posts: 518
Georgia
Steve Bryant
mopar
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mopar
Joined: Aug 2013
Posts: 518
Georgia
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In regard to the heads, there is an excellent writeup on the gains for porting and back-cuts on the valves. http://www.moparmusclemagazine.com/techarticles/5115_cylinder_heads/This article tells you all you need to know about the steel heads. You can compare these numbers against the published numbers for the Eddy and Indys. If I remember correctly, the back-cuts on the valves will give you more gains than the Mopar porting templates. I did both on mine and I don't think my engine shop charged me more than a couple-hundred for the extra work.
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Re: 440 rebuild
[Re: Steve Bryant]
#1669005
09/10/14 09:37 PM
09/10/14 09:37 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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The problem is that the bigblock heads don't flow any more than the better smallblock heads. Backcutting the valves with no other changes won't do much. Heck, the MP templates don't do that much, still won't get an iron head within the aluminum head out of the box.
Find Steve Dulcich's three-part article on porting B/RB heads. The link in the last post is the first of the three parts in Dulcich's bigblock head trilogy.
Be sure to also find and read Fast68's writeup on porting 906s, which is in the Tech archives.
Bottom line for me is that the 40+-year-old iron (they were never steel) heads flow poorly and have a lousy combustion chamber, except for the 915s. Any of them will cost more to port and rebuild than a Stealth or other entry level aluminum head. After they are ported, the iron heads have been known to crack and then all that money is up in smoke. Don't do it.
R.
Last edited by dogdays; 09/10/14 09:42 PM.
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Re: 440 rebuild
[Re: KingTuna]
#1669006
09/11/14 12:18 AM
09/11/14 12:18 AM
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Joined: Jan 2012
Posts: 1,650
Harm City Md.
Dan Halen
top fuel
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top fuel
Joined: Jan 2012
Posts: 1,650
Harm City Md.
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Quote:
Quick question. Lets hypothetically say that I decide to stay with stock cast iron heads. How much would it affect performance if I didn't port them? Would simply installing biggers valves help with a nice combustion chamber polish? How well do the stock heads flow up to .500 lift?
Actually, as told to me by a few reputable Super Stock guys, the only reason to install larger valves in a production head, would be to fix a worn out seat. The 2.08 valves generate better velocity since the ports are so poor to begin with. Stock heads flow in the low 200s, they're good truck heads. 
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Re: 440 rebuild
[Re: Dan Halen]
#1669007
09/11/14 11:19 AM
09/11/14 11:19 AM
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Joined: Feb 2014
Posts: 416
Georgia
KingTuna
OP
mopar
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OP
mopar
Joined: Feb 2014
Posts: 416
Georgia
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Got ya, now I understand a little better. Well, I guess it's time to start seeing if I can liquidate a few other playtoys to help fund. I wouldnt mind find a used engine for a good price, but as I have never built one myself I would really like to. Stealth heads it is! Quick question about them. I have seen some say you can run them straight out of the box, and I have seen others say to have a machine shop check them and ensure everything has the proper clearances, etc. Any opinions?
2014 Ram 1500 Pentastar V6
1966 Fury II 4 door
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