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Re: stealth heads?
[Re: 73_dart_beast]
#736118
06/29/10 12:04 AM
06/29/10 12:04 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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Quote:
I want to build a 512 stroaker and i was concidering using the cnc ported stealth heads from 440source. Anyway do any of you have thease heads? If so what type of power are they capable of making? Can the heads handle being cnc ported to the maxwedge size ports and would they flow more than the standard cnc port? Thanks in advance, have a great day...
The 440 source Stealth and Edelbrock RPM heads really are geared / sold as aluminum replacement heads that make good power, but I would not bother trying to make them into a race head. If you want a max wedge port size head, use the Indy, Edelbrock Victor M/W, B1, or (I think pro-comp may have a M/W port size head?)
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Re: stealth heads?
[Re: TonyS451]
#736122
06/29/10 11:50 AM
06/29/10 11:50 AM
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Joined: Jan 2003
Posts: 21,065
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: 21,065
Niles , Ohio
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I agree the Stealths are a good buy for what they are.My motor is pushing 600 with them and they have been on 3 years street strip.Ive heard some of the other heads suggested are cracking and porous.If you want to go Max wedge Id look at Indys.Rocky
Chrysler Firepower
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Re: stealth heads?
[Re: 73_dart_beast]
#736123
06/29/10 11:53 AM
06/29/10 11:53 AM
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Joined: Sep 2007
Posts: 876
Arizona
PolyDart
super stock
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super stock
Joined: Sep 2007
Posts: 876
Arizona
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Quote:
Can the heads handle being cnc ported to the maxwedge size ports and would they flow more than the standard cnc port?
There is a guy on the Big Block Dart site who took his Stealth heads up to MW port size. I believe he needed to do a bit of TIG welding, but he definitely did it. If I'm not mistaken he's running 8s in an Arrow.
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Re: stealth heads?
[Re: TonyS451]
#736125
06/29/10 07:17 PM
06/29/10 07:17 PM
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Joined: Sep 2008
Posts: 2,840
Flint, Michigan
B1Fish540
master
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master
Joined: Sep 2008
Posts: 2,840
Flint, Michigan
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Quote:
Quote:
Thanks for the info. I am really looking to make a 700 HP street srtip car. To hurt some feelings here in the big easy. 
Hurt some feelings  , I like that. I agree, if 700hp is the number you need, and you like the Stealth value, I might look to the Pro Comp Victor copies. They are selling those for like 1500 bucks cnc ported. The Stealths could get you to 700, but would need to be a max effort type build.
 the motor would be pretty hairy..not much fun on the street. 700 HP is alot for any street motor..unless forced induction or nitrous is used. Something like a 572 with SR heads is what it would take to get 700 "streetable" N/A horsepower...and thats big $$$.
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Re: stealth heads?
[Re: TonyS451]
#736130
06/30/10 05:03 PM
06/30/10 05:03 PM
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Joined: Dec 2008
Posts: 136
CHANDLER, AZ
512 VALIANT
member
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member
Joined: Dec 2008
Posts: 136
CHANDLER, AZ
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Quote:
Quote:
Thanks for the info. I am really looking to make a 700 HP street srtip car. To hurt some feelings here in the big easy.
Hurt some feelings , I like that. I agree, if 700hp is the number you need, and you like the Stealth value, I might look to the Pro Comp Victor copies. They are selling those for like 1500 bucks cnc ported. The Stealths could get you to 700, but would need to be a max effort type build.
I agree this is a post here on my engine, similiar #'s https://board.moparts.org/ubbthreads/show...&PHPSESSID=
700hp just doesn't fall out of trees. Stealth heads are not going to get you there. 
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Re: stealth heads?
[Re: 512 VALIANT]
#736131
06/30/10 05:20 PM
06/30/10 05:20 PM
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Joined: Jun 2005
Posts: 793
Utah
topbrent
super stock
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super stock
Joined: Jun 2005
Posts: 793
Utah
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If you can be satisfied with "only" 654-HP, build a clone of this engine. It uses hand ported RPM heads. MCH cnc Stealth heads are even better. There are many combinations out there, but this one is very impressive from the parts/cost/performance standpoint. The Scott Brown built, 496 in Caper's car is simple and stout. 10.44 , 1.44 60 ft 3704lbs, street driven 654 hp , 653 ft tq http://www.buyracingparts.com/dyno-ehead496.html496 CID Wedge - pump gas street engine (10.7 to 1) Straightline rotating assembly Ported Edelbrock heads (300 CFM) Ported Victor Single Plane Straightline Flat tappet, 263/273 @ .050 4150 Carb ( Quick Fuel 1050-AN) Indy Roller rockers 1" tapered spacer   
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383man
[Re: topbrent]
#736132
06/30/10 08:52 PM
06/30/10 08:52 PM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Quote:
If you can be satisfied with "only" 654-HP, build a clone of this engine.
It uses hand ported RPM heads. MCH cnc Stealth heads are even better.
There are many combinations out there, but this one is very impressive from the parts/cost/performance standpoint.
The Scott Brown built, 496 in Caper's car is simple and stout.
10.44 , 1.44 60 ft 3704lbs, street driven 654 hp , 653 ft tq
http://www.buyracingparts.com/dyno-ehead496.html
496 CID Wedge - pump gas street engine (10.7 to 1)
Straightline rotating assembly
Ported Edelbrock heads (300 CFM)
Ported Victor Single Plane
Straightline Flat tappet, 263/273 @ .050
4150 Carb ( Quick Fuel 1050-AN)
Indy Roller rockers
1" tapered spacer
Thats very close to what I want to build for my 63. When I can afford the parts I plan to build it as I want it to be a 3700 lb mid 10 second pump gas street car. Thats my ultimate goal with my 63 and I was planning on using Eddy heads and the Victor intake at first. Ron
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Re: stealth heads?
[Re: 512 VALIANT]
#736133
06/30/10 11:35 PM
06/30/10 11:35 PM
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Joined: Jun 2004
Posts: 741
Carson City, NV
440sourcedotcom
super stock
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super stock
Joined: Jun 2004
Posts: 741
Carson City, NV
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Quote:
700hp just doesn't fall out of trees. Stealth heads are not going to get you there.
We have had quite a few people break the 700 HP mark with the CNC stealth heads done by Jeff at Modern. The heads are 320+ CFM, using the standard formula which translates CFM into horsepower potential (because internal combustion engines are, after all, large air pumps) 320 CFM comes out to about 690 horsepower or so, IIRC.
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Re: stealth heads?
[Re: AndyF]
#736135
07/01/10 07:49 AM
07/01/10 07:49 AM
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Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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First off, let me say welcome to the board 
While I've never run the Stealth heads, I've heard that they can be made to flow about the same as Eddy RPM's. If that's true, Like Adny said an experienced builder should be able to get you there.
We did make a couple of pulls on my Koffel's Place built 446 with hand ported eddy heads on C 12 .
The best Gas pull of the first go around. This was with the 5555 solid cam intaslled on a 108 CL
After the bearing and spring failure, Scott decided to adv the cam to 105 to make a little more piston to valve clearence and lower the RPM range to help my springs live longer and not float the valves.
All things being equal, I'ld think the extra cubes and maybe a bigger cam than I'm running would improve those numbers.
Assuming I'm not at the limit of what the heads can feed that is 
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