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Re: 440 Source Stealth Heads
[Re: therocks]
#918385
02/04/11 08:34 AM
02/04/11 08:34 AM
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Joined: Nov 2005
Posts: 836
lancaster, new york
macmic87
super stock
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super stock
Joined: Nov 2005
Posts: 836
lancaster, new york
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Quote:
My machinist checked my Stealths.He thought the stock keepers looked thin.He miked them compared to what he uses and they were the same.He is a perfectionist and to look OK to him is tough.I upgraded because of my combo.If I had bought Eddys I still would have changed what I did.I still would of had him check them also.No matter if they are a 1000 a set or 3000 a set I would have them checked.They are assembled quick on a production line.The 200 I spent to have him check them and do the light work was cheap.He just cleaned up the ports a bit and back cut them to his satisfaction.That price also included 80 bucks for head gaskets.Rocky
i have a set of stealths and had them checked out for piece of mind. machinist changed locks to a better material. honed the exhaust guides to proper clearance and lapped the valves. also check spring pressures and cc'd the combustion chamber and i am glad he did, they ended up being 88 cc. that is a little higher than the advertised amount but now i can make better calculations for my build. 
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Re: 440 Source Stealth Heads
[Re: Stanton]
#918386
02/04/11 09:50 AM
02/04/11 09:50 AM
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Joined: Aug 2005
Posts: 4,800
ILL
MLR426
master
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master
Joined: Aug 2005
Posts: 4,800
ILL
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The better the head the less cam you need ?? Where do did you learn this ??
Please explain your thought process. I will first.
The bigger isn't better with stock cams, you can do a better valve job, blah, blah, blah ...
The better the head the less cam you need ?? Ok let's put a B1 head on a 76 440 ?? The point here is the bigger and better the head the less port flow speed you have which makes the engine a pig down low. With stock cams to much head flow will kill the performance.
Boy, you just keep reading sh!t that just isn't there, don't you !!!
I said BETTER not BIGGER! Two different things. The 'Source head is a BETTER head, flows better, higher CR, lighter, etc.. But one thing it is NOT is BIGGER - unlike your ridiculous example of putting a B1 head on a stock motor !!!
What I'm simply saying is that it's not worth the added cost of the heads if your not going to take advantage of the added performance by putting a better camshaft,and adding compression to your engine to see the gains. Again you have to have a camshaft that can support the head your putting on the engine, if the cam is too small it cannot support a better flowing head and performance suffers.
It's not worth getting all worked up about..
logan426
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Re: 440 Source Stealth Heads
[Re: MLR426]
#918387
02/04/11 10:18 AM
02/04/11 10:18 AM
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Joined: Jan 2006
Posts: 587
IL . usa
cjs69mope
mopar
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mopar
Joined: Jan 2006
Posts: 587
IL . usa
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To answer the op's question i have the 440 source heads , i took them to my machinist and he also was very impressed with the look and feel of the heads . I had him do a valve job because i know that his performace valve job produces more power than stock . This is on every head he has done for me the way he does the back cut on the valves and the angles he uses is actualy like a 5 angle type valve job so on the Dyno they flow better . I also had him install viton valve seals correct the valve guides and set a new set of comp cams Bee hive springs with 10 deg locks only because my cam go,s over 500in lift . He told me that I would be pushing the envalope if I did not change to ten deg locks because my cam is aggressive ramp rates and more lift then stock . If your motor is completely stock and you want to run them i am sure you will be fine and enjoy them . they have to be better than worn stock 906 heads with the normal 1/4 inch of valve guide wear . Like the others have said for 50-60 dollars i would up grade to some comp cams or crane cam locks and keepers or at least the keepers so i could sleep better knowing that when i drop[ the hammer on cruise night (to show off )that my motor does not blow up all over the street as i do my burn out to go home after the cruise nite show ! 
1969 Dodge Charger
1969 Dodge Superbee
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Re: 440 Source Stealth Heads
[Re: WILD BILL]
#918388
02/04/11 10:21 AM
02/04/11 10:21 AM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
The Stealth is the stock appearing alum head
And the MP 452 aluminum head...
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: 440 Source Stealth Heads
[Re: Von]
#918389
02/04/11 10:41 AM
02/04/11 10:41 AM
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Joined: Jan 2003
Posts: 75,326
A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,326
A gulag near you.
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Quote:
Quote:
The Stealth is the stock appearing alum head
And the MP 452 aluminum head...
No the MP head is an Ebrock head with a freeze plug on the end , still milled flat unless something has changed.
As far as the rest of the thread , there is some funny stuff in here , but not enough 
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Re: 440 Source Stealth Heads
[Re: MLR426]
#918390
02/04/11 11:57 AM
02/04/11 11:57 AM
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Joined: Jan 2003
Posts: 21,129
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,129
Niles , Ohio
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The big thing is put 500 to 600 ina set of old heads or buy new that are lighter and better flowing.If in a few years you want to upgrade the cam etc you have the heads there.I had over 1200 in my old 516s.Now they are on my kids 62 300.They were done when the cheapest aftermarket heads were like 2500 or more.Rocky
Chrysler Firepower
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Re: 440 Source Stealth Heads
[Re: Been There]
#918393
02/04/11 12:18 PM
02/04/11 12:18 PM
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Joined: Jan 2003
Posts: 75,326
A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,326
A gulag near you.
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Quote:
In all the threads on the Stealth heads, I have never seen any one talk about how much the head expands with heat
I had a set of there roller rockers and set the valve lash on the tight side like you would on steel heads, ended up tearing the bock apart for 3 rockers destructed
we had to set them with a inch torque bar
That had nothing to do with the head expansion , more than one person has lost engines because of those rockers coming apart .
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Re: 440 Source Stealth Heads
[Re: JohnRR]
#918394
02/04/11 12:31 PM
02/04/11 12:31 PM
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Joined: Jan 2010
Posts: 31
Norhern MN
Been There
member
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member
Joined: Jan 2010
Posts: 31
Norhern MN
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Quote:
Quote:
In all the threads on the Stealth heads, I have never seen any one talk about how much the head expands with heat
I had a set of there roller rockers and set the valve lash on the tight side like you would on steel heads, ended up tearing the bock apart for 3 rockers destructed
we had to set them with a inch torque bar
That had nothing to do with the head expansion , more than one person has lost engines because of those rockers coming apart .
Maybe but.....
The expansion or the quality of the metal used in both or either the head or the rocker is suspect
plus I had imprfections in the casting too 
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Re: 440 Source Stealth Heads
[Re: Been There]
#918395
02/04/11 03:36 PM
02/04/11 03:36 PM
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Joined: Oct 2005
Posts: 9,098
Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 9,098
Ontario, Canada
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Quote:
The expansion or the quality of the metal used in both or either the head or the rocker is suspect
In all fairness to the manufacturer, until you're done speculating and have solid evidence as to the cause maybe you shouldn't be pointing fingers. You said yourself you set them on the tight side, seems to me the problem was the guy at the end of the wrench!
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Re: 440 Source Stealth Heads
[Re: Stanton]
#918396
02/04/11 06:07 PM
02/04/11 06:07 PM
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Joined: Jan 2010
Posts: 31
Norhern MN
Been There
member
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member
Joined: Jan 2010
Posts: 31
Norhern MN
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Quote:
Quote:
The expansion or the quality of the metal used in both or either the head or the rocker is suspect
In all fairness to the manufacturer, until you're done speculating and have solid evidence as to the cause maybe you shouldn't be pointing fingers. You said yourself you set them on the tight side, seems to me the problem was the guy at the end of the wrench!
I have seen two sets of heads that have had quality control problems
These are not a quality product and people need to know more......
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Re: 440 Source Stealth Heads
[Re: Been There]
#918397
02/04/11 06:45 PM
02/04/11 06:45 PM
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Joined: Oct 2005
Posts: 9,098
Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 9,098
Ontario, Canada
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Quote:
people need to know more......
Ok ... there was nothing wrong with my set.
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Re: 440 Source Stealth Heads
[Re: Stanton]
#918398
02/04/11 07:35 PM
02/04/11 07:35 PM
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Joined: Jan 2010
Posts: 31
Norhern MN
Been There
member
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member
Joined: Jan 2010
Posts: 31
Norhern MN
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Quote:
Quote:
people need to know more......
Ok ... there was nothing wrong with my set.
What would say about installing rocker gear and using a torque wrench and in an instant a chunk of metal comes loose from the head
Poor quality metal
By the way the mechanic is one of the mopar dealer top mechanic in this area
440 Source said too bad
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Re: 440 Source Stealth Heads
[Re: ireland383]
#918399
02/04/11 07:45 PM
02/04/11 07:45 PM
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Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
MoparDonny
top fuel
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top fuel
Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
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Thanks for the advice. I thought these heads were a bolt on and go? It sounds like alot of swapping parts that are already assembled on the head. I don't like the idea of swapping the locks, retainers and springs to fit in an XE274 cam which isn't much bigger than the stock one, it seems for $1000 these heads should be able to support that right out of the box. So far the vibe I get is these heads are junk.
That cam isn't even over 500 lift IIRC. All the stuff on those heads will handle that cam easily. As with any aftermarket head you should have them checked. By the way my machinist checked mine over and was very impressed (changed nothing).
I took mine apart just to check stuff over. The seats have a bit of a ridge under them that should be ground a little, but untouched (other than the checkover) my XE284 3.91 geared 451 has run 11.74 at 115.6 with limited traction off the start.
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Re: 440 Source Stealth Heads
[Re: Been There]
#918400
02/04/11 07:55 PM
02/04/11 07:55 PM
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Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
MoparDonny
top fuel
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top fuel
Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
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Quote:
Quote:
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people need to know more......
Ok ... there was nothing wrong with my set.
What would say about installing rocker gear and using a torque wrench and in an instant a chunk of metal comes loose from the head
Poor quality metal
By the way the mechanic is one of the mopar dealer top mechanic in this area
440 Source said too bad
What do you mean??? Did a pedestal break or something??
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Re: 440 Source Stealth Heads
[Re: MoparDonny]
#918401
02/04/11 08:46 PM
02/04/11 08:46 PM
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Joined: Jan 2010
Posts: 31
Norhern MN
Been There
member
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member
Joined: Jan 2010
Posts: 31
Norhern MN
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Quote:
Quote:
Quote:
Quote:
people need to know more......
Ok ... there was nothing wrong with my set.
What would say about installing rocker gear and using a torque wrench and in an instant a chunk of metal comes loose from the head
Poor quality metal
By the way the mechanic is one of the mopar dealer top mechanic in this area
440 Source said too bad
What do you mean??? Did a pedestal break or something??
Yes, the pedestal base seperated from the head
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Re: 440 Source Stealth Heads
[Re: Been There]
#918402
02/04/11 09:44 PM
02/04/11 09:44 PM
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Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
MoparDonny
top fuel
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top fuel
Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
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Quote:
Yes, the pedestal base seperated from the head
Is it more likely that the rocker shaft was ovalled from previous use or the pedestal being machined wrong. I had a badly squashed set of shafts that I replaced when I put my motor together.
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Re: 440 Source Stealth Heads
[Re: MoparDonny]
#918403
02/04/11 09:48 PM
02/04/11 09:48 PM
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Joined: Jan 2010
Posts: 31
Norhern MN
Been There
member
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member
Joined: Jan 2010
Posts: 31
Norhern MN
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Quote:
Quote:
Yes, the pedestal base seperated from the head
Is it more likely that the rocker shaft was ovalled from previous use or the pedestal being machined wrong. I had a badly squashed set of shafts that I replaced when I put my motor together.
This guys like everything new
Nothing else will do
When you buy these heads you have to remember where they are made.. faking the real thing is no substite for the real thing
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Re: 440 Source Stealth Heads
[Re: JoesMopar]
#918404
02/05/11 12:24 PM
02/05/11 12:24 PM
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Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581
master
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master
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
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I have a set on my 440.No problems.I did go with different springs,locks and retainers as I'm using a 296/557 Mopar cam.
And IMHO..you can buy 440 source stuff or not,but if you haven't bought then don't complain about their stuff either.
Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
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