Re: 440 source stealth heads: GOOD?? BAD??
[Re: Thor500]
#712592
05/31/10 06:11 PM
05/31/10 06:11 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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IMO they are a great replacement head, and mkae good power too. On the same note, I dont think they are a race head, and not a option in a race type appication.... Of coarse these are just my opinions.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: 440 source stealth heads: GOOD?? BAD??
[Re: Thor500]
#712594
05/31/10 06:32 PM
05/31/10 06:32 PM
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Joined: Jul 2004
Posts: 4,732 Watertown, WI
MikeyT
master
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master
Joined: Jul 2004
Posts: 4,732
Watertown, WI
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I really like mine, they work well and really flow well. I think I flowed 274 at .6 inch of lift out of the box, good numbers really helps my 440 breath.
Mike
1969 Dodge Dart Swinger
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Re: 440 source stealth heads: GOOD?? BAD??
[Re: dwayne welder]
#712599
05/31/10 07:37 PM
05/31/10 07:37 PM
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Joined: Dec 2004
Posts: 625 Florida-West Coast
Thor500
mopar
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mopar
Joined: Dec 2004
Posts: 625
Florida-West Coast
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Quote:
[Email]274@.6[/Email] sounds like a good bowl ported, and gasket match set of 906. I woulden wast my money on cnc, porting on these heads period!
Modern cylinder head cnc's them, I think they know what there doing!
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Re: 440 source stealth heads: GOOD?? BAD??
[Re: Thor500]
#712601
05/31/10 08:36 PM
05/31/10 08:36 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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Quote:
Quote:
[Email]274@.6[/Email] sounds like a good bowl ported, and gasket match set of 906. I woulden wast my money on cnc, porting on these heads period!
Modern cylinder head cnc's them, I think they know what there doing!
I know how they work, I purchased a set of Eddy's not long after they came out. The actually did check out OK for Use OOTB. Big heavy 69 Coronet totally stock suspension and gearing, bench seat went mid 7's in the 8th mile, so I know how they can work, seeing how they are direct copy's. Im just saying they have cracking problems, I can only imagine cnc port work would make them much worse. This isnt hear say, My best friend has a set on his mud truck, they are one season old...Both heads leak water like a sprinkler. Im not saying he done everything correct with this engine, but I dont see Indy heads, or Edelbrock heads cracking under race conditions. Thats all I am saying..... great for a little street car, or daily driver, they wont go on anything that makes more than 500hp in my book. They would get looked over, just like any other head for that matter. Fact is the castings are not that great. The material is soft. Valves, retainers and springs are junk, and wouldnt run these OOTB on one of my engines if they were offered for FREE..just to do this. Im not trying to make this a 440 Source Bash fest. Im just saying they are ment for a replacement head..They work well, and do work well even ported. But the casting problems and parts, and machine work can and do cause major problems.... Just the facts.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: 440 source stealth heads: GOOD?? BAD??
[Re: Bob_Coomer]
#712603
05/31/10 09:02 PM
05/31/10 09:02 PM
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Joined: Aug 2009
Posts: 2,074 Mooresburg, Tn
'72CudaRacer
top fuel
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top fuel
Joined: Aug 2009
Posts: 2,074
Mooresburg, Tn
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I put a set on my 440 this year. So far so good. 3200 lb E body, 11.5" MT tires, SS leaf springs, 13.5+ comp, .590 MP cam. 60' 1.39, 6.59 1/8, 103+ MPH (in East Tenn hills, 1300 ft above sea level). Didn't get to put it on dyno, but works out to approx 585 HP?
Brian Dunnigan
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Re: 440 source stealth heads: GOOD?? BAD??
[Re: Triple Threat]
#712605
05/31/10 09:36 PM
05/31/10 09:36 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Quote:
Thats the first instance I've heard of cracking. I'd like to think thats an isolated incident. My ootb set were from the first batch they sold.
I know of 3 or 4 people who have/had stealths. 2 of those people were making roughly 575-600 hp and both had issues with cracking. Heads were returned on both instances. Both now have Eddy's
Well I'll have to cross my fingers then. I've also got a set of first production run stealths. No problems yet but little miles on them so far. Will be in that hp range in the future so time will tell.
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Re: 440 source stealth heads: GOOD?? BAD??
[Re: VernMotor]
#712607
06/01/10 12:12 AM
06/01/10 12:12 AM
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Joined: Jun 2004
Posts: 744 Carson City, NV
440sourcedotcom
super stock
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super stock
Joined: Jun 2004
Posts: 744
Carson City, NV
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Quote:
There been at lease 5 sets posted on this web site alone that been cracked..I have seen 2 sets myself that been cracked... like it been said..if they do not crack..they would make a nice replacement head..They dam sure ain't no race head.
We did have one isolated production run last year that had a problem with the aluminum that made the heads more prone to cracking. The problem was solved shortly after it was discovered, and we have sold over two thousand heads since that particular production batch, and not a single one has had a cracking problem.
Every single customer that has called us with a cracked head has had it replaced under warranty at no charge, and we will continue to do this as long as possible.
Again, any cracks were an isolated incident from one production run. Please understand that any manufacturer, no matter how well known of a "name brand" or no matter expensive or inexpensive their products are, they will occasionally have issues which need to be corrected. This is the reason why reputable manufacturers offer a warranty against defects in manufacturing for a specified period of time after purchase.
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Re: 440 source stealth heads: GOOD?? BAD??
[Re: domingo]
#712608
06/01/10 03:46 AM
06/01/10 03:46 AM
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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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I have a set for a future build and castings look really good. The springs/retainers should be good for a hydraulic cam with around 0.500"+ lift? The pros of these heads: #1 - They look like a stock head (no other aluminum head does.) #2 - They fit like a stock head (straight plugs allow using manifolds or headers designed for stock heads. The angled plugs of the Edelbrocks can cause problems with headers not designed for the angled plugs.) #3 - Cost and performance. The cons: #1 - I guess they are not made in the USA? #2 - The large diameter chamber needs a larger bore size head gasket? #3 - Possable quality issue on some early heads? (just to be fair, my Stealth heads castings looked better than my Edelbrock Victors, and I did crack the Edelbrock heads, so any company can have problems?) I also know of at least three people who have been running the Stealth heads for a year or more with no problems
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