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Re: 440 Source Stealth Heads
[Re: Stanton]
#918366
02/03/11 11:10 AM
02/03/11 11:10 AM
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Joined: Aug 2005
Posts: 4,799
ILL
MLR426
master
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master
Joined: Aug 2005
Posts: 4,799
ILL
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Locks you say make no difference ??? I disagree totally. 7 degree locks on Steath heads are the cheap stamped steel rounded corner valve locks. If you stay with 7 degree retainers, buy 7 degree (machined) sharp corner locks so they fit deeper in the valve lock groove of the stem. Using stamped steel rounded corner locks bur the valve groove by riding up on the upper outside of the valve groove area. Which means it's trying to pull the valve stem through the valve locks. When you start putting more aggressive cam profiles against the standard Steath components changes must be made with springs, locks, and depending on application, retainers. The heads are fine the way they come for stock application cams, but why would you buy an aluminum performance head for stock cam application ?? So again components must be changed (Springs) to match the cam your using and it would be a good idea to change locks also. Check the spring rate of the springs on the steath heads against what the XE274 calls for.
logan426
Last edited by Logan426; 02/03/11 11:16 AM.
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Re: 440 Source Stealth Heads
[Re: MLR426]
#918367
02/03/11 11:27 AM
02/03/11 11:27 AM
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Joined: Oct 2005
Posts: 8,872
Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,872
Ontario, Canada
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Quote:
Locks you say make no difference ???
Who said that ??? Where ???
What WAS said is that in this case the cam has nothing to do with the locks and retainers because its such a mild grind. Changing the locks and retainers is simply for peace of mind.
Quote:
why would you buy an aluminum performance head for stock cam application
Why not ?!?! Its a cheap upgrade with better flow, uses all stock parts and retains stock idle quality, etc.. The better the head the less cam you need.
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Re: 440 Source Stealth Heads
[Re: yellow sixpack]
#918369
02/03/11 12:05 PM
02/03/11 12:05 PM
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Joined: Nov 2004
Posts: 843
Suffolk,VA
ireland383
super stock
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super stock
Joined: Nov 2004
Posts: 843
Suffolk,VA
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Quote:
I cant believe people still purchase parts from these guys. 
Maybe you should practice what you preach in your signature!
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Re: 440 Source Stealth Heads
[Re: ireland383]
#918371
02/03/11 01:04 PM
02/03/11 01:04 PM
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Joined: Jun 2006
Posts: 733
Long Island NY
yellow sixpack
super stock
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super stock
Joined: Jun 2006
Posts: 733
Long Island NY
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I do that why I would never by a bolt from them...You can send them your money Virginia guy and dont forget to tack on a bunch more for shipping both ways,,You will be needing to send parts back. Trust me..
If you can't be smart.....don't be stupid!
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Re: 440 Source Stealth Heads
[Re: JoesMopar]
#918372
02/03/11 01:18 PM
02/03/11 01:18 PM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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The stealth heads are fine for what your doing, and the springs/retainers will work with that cam.
I have a set of stealth heads for a 440 I am building, and I checked them out and they were good to go out of the box. I also know several people who are running them out of the box (un-modified) with no problems, but these are all mild hydraulic cammed engines, and the heads were bought for their stock appearance.
I think those that dislike the stealth head are those who think it should be race ready out of the box. Just because it is an aluminum head, does not mean it is a race head, although it should be good for 500+ HP.
I'm not sure what people expect when they buy the least expensive heads on the market?
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Re: 440 Source Stealth Heads
[Re: Stanton]
#918373
02/03/11 01:24 PM
02/03/11 01:24 PM
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Joined: Aug 2005
Posts: 4,799
ILL
MLR426
master
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master
Joined: Aug 2005
Posts: 4,799
ILL
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Quote:
Quote:
Locks you say make no difference ???
Who said that ??? Where ???
What WAS said is that in this case the cam has nothing to do with the locks and retainers because its such a mild grind. Changing the locks and retainers is simply for peace of mind.
Quote:
why would you buy an aluminum performance head for stock cam application
Why not ?!?! Its a cheap upgrade with better flow, uses all stock parts and retains stock idle quality, etc.. The better the head the less cam you need.
Cheap up grade with stock cam ?? The better the head the less cam you need ?? Where do did you learn this ??
Please explain your thought process. I will first.
1k is cheap compared to other choices of performance heads yes, but with a stock cam I could spend much less and improve my oe heads for stock cams that don't require a bunch of flow. The bigger isn't better with stock cams, you can do a better valve job, port match, unshroud valves, and clean valve pocket areas to improve the head for stock cams and not cost much to do. 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. My point with changing the locks is most people who purchase Steath heads do cam up grades so they need to at least check the spring rates of the springs and also change to 7 degree machined locks for sure. The 2 sets of Steaths I've worked on had 130 lbs on the set which is the low lb end for a solid cam, and on the high end for a hydraulic cam, and had stamped steel locks, that's scary in my opinion. I'm just stating my opinion and you have yours that's fine.
logan426
Last edited by Logan426; 02/03/11 01:27 PM.
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Re: 440 Source Stealth Heads
[Re: MLR426]
#918376
02/03/11 05:38 PM
02/03/11 05:38 PM
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Joined: Nov 2004
Posts: 843
Suffolk,VA
ireland383
super stock
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super stock
Joined: Nov 2004
Posts: 843
Suffolk,VA
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Quote:
Quote:
here is the pic that that one of the mods wacked last night. this is my stealth head with 500 miles on it. i bet there is lots more heads with the same problem but most guys have just bolted them on and forgot about them.
i guess buying a fake rolex from china and expecting it to be the same quality as a real one is a good comparison to these heads vs a eddie or indy. Chinese knock off vs quality. bottom line is its your money.
Not just those holes, look at where it has leached out into the porosity of the head and causing other damage, more holes to come at a later date.
logan426
That's funny I had mine off after 5,000 miles and they looked as good as they day they were shipped. This is with beating the snot out of them with many runs well over 100 mph. Whatever.
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Re: 440 Source Stealth Heads
[Re: 451Mopar]
#918377
02/03/11 06:54 PM
02/03/11 06:54 PM
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Joined: Dec 2006
Posts: 3,533
Indiana
Fury Fan
master
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master
Joined: Dec 2006
Posts: 3,533
Indiana
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Quote:
I think those that dislike the stealth head are those who think it should be race ready out of the box.
 And I bet if you tracked those folks closely, eventually most of them would say there is no such thing as a bolt on part, that in the hi-performance world everything must be checked and verified no matter who you buy it from.
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Re: 440 Source Stealth Heads
[Re: Fury Fan]
#918378
02/03/11 07:24 PM
02/03/11 07:24 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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this 440 source bashing gets a little old. they sell a product. period. if it works for you, buy it. if it doesn't, don't.
no matter how good someone's customer service is, there will always be some sort of problem, some sort of quality control issue, some sort of something, that will leave someone disgruntled.
there are many, many people here who are happy with 440 source's product. if not, people on this board wouldn't be buying from them.
there are some people who are not happy with them, and we know that.
if someone starts a thread asking for positive/negative experiences with a company, that is the place to post. otherwise, to just throw in a negative comment in a post that is not asking that is meaningless, unless somehow it directly applies to the topic.
i'm sure there are people out there who are pissed off at Indy, Stage V, Keith Black, Ray Barton, and all the other popular names.
if someone asks for experience with a vendor, then post, but otherwise, what's the point?
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Re: 440 Source Stealth Heads
[Re: Fury Fan]
#918379
02/03/11 07:39 PM
02/03/11 07:39 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOrk !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
Quote:
I think those that dislike the stealth head are those who think it should be race ready out of the box.
And I bet if you tracked those folks closely, eventually most of them would say there is no such thing as a bolt on part, that in the hi-performance world everything must be checked and verified no matter who you buy it from.
HAVETA' disagree here ! 
If you buy an ASSEMBLED bunch of parts .... it should be ready-to-use.
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Re: 440 Source Stealth Heads
[Re: mickm]
#918380
02/03/11 08:06 PM
02/03/11 08:06 PM
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Joined: Nov 2004
Posts: 173
Milano, Italia
FK5
member
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member
Joined: Nov 2004
Posts: 173
Milano, Italia
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Quote:
this 440 source bashing gets a little old. they sell a product. period. if it works for you, buy it. if it doesn't, don't.
no matter how good someone's customer service is, there will always be some sort of problem, some sort of quality control issue, some sort of something, that will leave someone disgruntled.
there are many, many people here who are happy with 440 source's product. if not, people on this board wouldn't be buying from them.
there are some people who are not happy with them, and we know that.
if someone starts a thread asking for positive/negative experiences with a company, that is the place to post. otherwise, to just throw in a negative comment in a post that is not asking that is meaningless, unless somehow it directly applies to the topic.
i'm sure there are people out there who are pissed off at Indy, Stage V, Keith Black, Ray Barton, and all the other popular names.
if someone asks for experience with a vendor, then post, but otherwise, what's the point?
I disagree. I could see not wanting straight mindless bashing, but when a guy posts "would this be a good head to use" I would assume that quality and value are part of his question.
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Re: 440 Source Stealth Heads
[Re: FK5]
#918381
02/03/11 08:53 PM
02/03/11 08:53 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
I disagree. I could see not wanting straight mindless bashing, but when a guy posts "would this be a good head to use" I would assume that quality and value are part of his question.
yup, you're right, just get tired of all the 440 source bashing.
i had only been peeking in at this post and lost track of what the OP was asking.
never mind!
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Re: 440 Source Stealth Heads
[Re: FK5]
#918382
02/03/11 10:18 PM
02/03/11 10:18 PM
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Joined: Dec 2008
Posts: 2,782
USA
JoesMopar
OP
master
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OP
master
Joined: Dec 2008
Posts: 2,782
USA
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Quote:
I disagree. I could see not wanting straight mindless bashing, but when a guy posts "would this be a good head to use" I would assume that quality and value are part of his question.
Yes, thank you.
Basically I was just wanting to know if these were a decent head for a mild 383 as I described. I appreciate everyone's input. I also thought in the back of my mind that I may use these down the road on a bigger build later on. I have a very good idea now of what I'm dealing with, because I've never dealt with this company before and I trust all of your input no matter who agrees on what.
What I'm narrowing it down to is if $1000 for a set of these heads is worth spending VS $500 or so to rework the old 906's. I'm leaning towards getting them, I just didn't understand the whole "swapping springs, locks and retainers" comments when I was only going with a slightly bigger cam. The reason being I have a set of Edelbrocks on a 440 with a 292/.509 cam, didn't change anything on the heads and haven't had a single problem with anything. I was asssuming these would be comparable to the Edelbrocks.
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Re: 440 Source Stealth Heads
[Re: chrisf]
#918383
02/03/11 11:12 PM
02/03/11 11:12 PM
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Joined: Oct 2005
Posts: 8,872
Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,872
Ontario, Canada
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Quote:
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.
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 !!!
Last edited by not_a_charger; 02/05/11 09:38 PM.
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Re: 440 Source Stealth Heads
[Re: JoesMopar]
#918384
02/04/11 09:05 AM
02/04/11 09:05 AM
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Joined: Jan 2003
Posts: 21,072
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: 21,072
Niles , Ohio
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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
Chrysler Firepower
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