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Re: stealth head cracked
[Re: moparpilot1]
#852818
11/13/10 09:38 PM
11/13/10 09:38 PM
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Joined: Feb 2005
Posts: 20,185
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,185
PA.
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Almost called you yesterday to see how you made out. I guess you haven't heard back from Brandon yet. Hope everything works out.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: stealth head cracked
[Re: Triple Threat]
#852821
11/14/10 06:18 AM
11/14/10 06:18 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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why are they cracking? too much power? un-true surfaces being clamped down causing too much flex?
or are they simply too brittle?
anyone done any analysis on them to find out why they've cracked?
**Photobucket sucks**
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Re: stealth head cracked
[Re: The Cuda Guy]
#852824
11/14/10 10:42 AM
11/14/10 10:42 AM
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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:
Posts like this make me very nervous! I have a set of cnc stealths Im putting on my 493.
Don
You should probably not use those, PM me I might take em off your hands, just to help you out. 
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Re: stealth head cracked
[Re: Thor500]
#852825
11/14/10 10:51 AM
11/14/10 10:51 AM
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Joined: Oct 2008
Posts: 1,015
Down South
DaKuda
super stock
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super stock
Joined: Oct 2008
Posts: 1,015
Down South
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Guy here had a brand new set crack and blow head gaskets on the same run. They sent him new heads and told him to torque them to like 55ft.lbs. Said they dont need to be torqued like a set of Edelbrocks or Indy's. To me that says the material must be cheaper quality and softer...??? For what its worth, he did torque them to 55ftlbs. and they are working fine....for now.
Last edited by DaKuda; 11/14/10 10:52 AM.
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Re: stealth head cracked
[Re: DaKuda]
#852827
11/14/10 11:11 AM
11/14/10 11:11 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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Quote:
Guy here had a brand new set crack and blow head gaskets on the same run. They sent him new heads and told him to torque them to like 55ft.lbs. Said they dont need to be torqued like a set of Edelbrocks or Indy's. To me that says the material must be cheaper quality and softer...??? For what its worth, he did torque them to 55ftlbs. and they are working fine....for now.
if they were softer, they wouldn't crack, they would deform, warp, bend, etc. soft metal does not crack, hard metal does.
**Photobucket sucks**
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Re: stealth head cracked
[Re: moparpilot1]
#852829
11/14/10 01:30 PM
11/14/10 01:30 PM
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Joined: Feb 2007
Posts: 5,080
organ
maximum entropy
master
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master
Joined: Feb 2007
Posts: 5,080
organ
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i had a set crack a couple of years ago. both heads cracked badly, and in the same places. my guess is the heat treat was incorrect. 440source sent new heads, and it made it through a full season.
for what is the good life if not doing things thoughtfully?
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Re: stealth head cracked
[Re: Quicktree]
#852832
11/14/10 02:20 PM
11/14/10 02:20 PM
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Joined: Jan 2003
Posts: 3,048
Richmond, Tx. (Houston)
GTSDave
master
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master
Joined: Jan 2003
Posts: 3,048
Richmond, Tx. (Houston)
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Quote:
you guys could have bought some eddy's and been way ahead of the game. enjoy the chinese quality.....
I have Indys on my race motors. I bought Stealths because I can paint them and they look totally stock. IF they made Eddies that looked stock on the outside I would have bought them in a second.
For now the Stealth is the only game in town if you want aluminum heads that look stock. It wasn't really a price thing with me, it was the visual appeal they have for my resto cars. I will say though that they are getting new valves, springs, keepers, and a thorough going through before they get bolted on my engine. I essentially bought them for the casting.
-Dave
PLEASE Pray for our brothers and sisters in harms way. If you are the owner of a GTS us at the GTS Registry www.gtsregistry.com
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Re: stealth head cracked
[Re: moparniac]
#852834
11/14/10 02:35 PM
11/14/10 02:35 PM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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Quote:
Quote:
Guy here had a brand new set crack and blow head gaskets on the same run. They sent him new heads and told him to torque them to like 55ft.lbs. Said they dont need to be torqued like a set of Edelbrocks or Indy's. To me that says the material must be cheaper quality and softer...??? For what its worth, he did torque them to 55ftlbs. and they are working fine....for now.
Wonder why he didn't tell customers that from the start.... Then say send em back and only torque new ones to 55!
My Stealth heads came with specific torque instructions that said 60 ft/lbs with ARP lube, or 70 ft/lbs with 30 wt. oil. I was using 30 wt., so went to 70 lbs in (3) incremental steps. No problems here. These were shipped to me in Dec. '09, have approx. a thousand miles on them now, with plenty of trips to 6500 RPM, no issues.
Last edited by GEnsrud; 11/14/10 04:40 PM.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: stealth head cracked
[Re: Quicktree]
#852835
11/14/10 02:43 PM
11/14/10 02:43 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
you guys could have bought some eddy's and been way ahead of the game. enjoy the chinese quality.....
  
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Call them again 
