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Eldebrock RPM's vs. 440 Source Stealth heads**UPDATE** #1455047
06/18/13 09:49 PM
06/18/13 09:49 PM
Joined: Aug 2009
Posts: 2,036
Mooresburg, Tn
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'72CudaRacer Offline OP
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'72CudaRacer  Offline OP
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Mooresburg, Tn
Trying to decide which way to go and would welcome some input from from other racers in my position.
First, some back ground. I built this engine (440 +.030, MP .590 cam, Ross domed pistons 99501, H beam rods, Hooker super comp headers, 1050 dominator carb) with 440 Source Stealth heads. One of them cracked where the early castings were prone to crack (end exhaust port into the spark plug hole, not really cost effective to repair). Then I put my trusty cast iron 452's (some port work) on and was OK with that. Doing so I added 40 lbs back to the front of the car and lost .3 ET (from 6.50s to 6.80s) Now one of the 452's is cracked and I have to make a dession as to which way to go.
I'm not looking for 700 hp or even 650 hp because the car is not tubbed and runs 11.5 X 29.5 slicks on SS leaf springs. I am also trying to keep the cost down as much as possible.
I'm looking at Indy SR heads, but they may be over kill for my needs, plus a lot of others issues to deal with (such as external oil lines, differnt push rods, valley plate, angled plugs, raised exh ports, ect)
All that brings me back to basicly two choices, 440 Source Stealth heads or Eldebrock RPM's. On paper they look very similar. As cast they flow as good as a preped 906 or 452.
All that to ask this; OOB, which head do you feel would be the better choice for me?
Thanks for your help,
Brian

Last edited by '72CudaRacer; 06/23/13 09:45 AM.
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: '72CudaRacer] #1455048
06/18/13 10:01 PM
06/18/13 10:01 PM
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581 Offline
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Chris2581  Offline
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Jacksonville, FL
Even though I have Stealth's and so far am happy with them,I would go Edelbrock.The only 2 reasons I went with Stealths was the cost and that they look like the stock Mopar heads.For a dedicated race car Edelbrock would be my choice.


Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: Chris2581] #1455049
06/18/13 10:46 PM
06/18/13 10:46 PM
Joined: Jan 2003
Posts: 1,412
Johnstown
69dart Offline
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69dart  Offline
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Johnstown
I put a set of stealth heads on the 383 in my roadster. They required about 4 hours of grinding to get the pushrods to clear but otherwise I haven't had any complaints. I would buy them bare and let your machine shop set them up as you probably won't be using the springs, locks or retainers that they come with.

My little 383 has gone 9.83 @ 133 with them.


33 Plymouth Roadster - 383 - 5.90 1/8th 9.58 1/4
68 Dart - 340
66 Belvedere - 400

Windy Hollow Garage - https://www.youtube.com/@windyhollowgarage
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: 69dart] #1455050
06/18/13 11:01 PM
06/18/13 11:01 PM
Joined: Dec 2008
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okla.
sam64 Offline
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sam64  Offline
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okla.
angle plugs looks to be the factor.

Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: sam64] #1455051
06/18/13 11:16 PM
06/18/13 11:16 PM
Joined: Jan 2003
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KENTUCKY
69CHARGERMD Offline
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69CHARGERMD  Offline
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KENTUCKY
I run the edelbrock RPM performers.
Have run a best of 10.04 at Norwalk last year.
No complaints.
Dwayne Porter did the heads.

Doug.

Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: 69CHARGERMD] #1455052
06/18/13 11:24 PM
06/18/13 11:24 PM
Joined: Jan 2004
Posts: 3,837
Central Missouri Fort Leonard...
mopar65 Offline
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Quote:

I run the edelbrock RPM performers.
Have run a best of 10.04 at Norwalk last year.
No complaints.
Dwayne Porter did the heads.

Doug.




Hey doug how have you been. would like to add those same heads out of the box ran 10.50 at 125-126. also ? for the op what about a set of the indy EZ heads? i pretty much have a out of box set of them on my 93 pump gas 440 3520 pound 1973 big block dart.have been a best of 10.49 at 125. Dwayne also did the heads for me. Bobby


3520 pound race ready 1973 Street/Strip Dodge Dart - Stock stroke 440/727 10.49 @ 125.0 on 93 pump gas & ET Street Radials. More to come... ( SGT Miller) Proudly served 12 years in the US ARMY RESERVES support our troops
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: mopar65] #1455053
06/18/13 11:47 PM
06/18/13 11:47 PM
Joined: Jul 2010
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Oologah, Oklahoma
Big Squeeze Offline
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Big Squeeze  Offline
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Oologah, Oklahoma
I don't understand the question here???...

Stealths are a cheap, Chinese copy of the Edelbrocks with the outside casting changed and plug angle moved...Modern even uses the EXACT same CNC porting program to port both heads...So, the question should be do you want a high quality, American made cylinder head or do you want to support the Chinese knock off??

Personally, I have not and will not build a motor with Stealth heads....


If you can't handle the truth, you're living a lie.......
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: '72CudaRacer] #1455054
06/19/13 12:27 AM
06/19/13 12:27 AM
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Posts: 1,979
s. e. pa.
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calrobb2000 Offline
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hi,
the eldebrocks will be higher quality and not need anything to run with your combo . i have used the 84cc with a 590 cam ,no machiene work needed !

no expencive trp to machiene shop for extra bs !

Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: Big Squeeze] #1455055
06/19/13 12:55 AM
06/19/13 12:55 AM
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Renton Washington
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Triple Threat Offline
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Renton Washington
Quote:

I don't understand the question here???...

Stealths are a cheap, Chinese copy of the Edelbrocks with the outside casting changed and plug angle moved...Modern even uses the EXACT same CNC porting program to port both heads...So, the question should be do you want a high quality, American made cylinder head or do you want to support the Chinese knock off??





Seems like a pretty simple answer, you already had the stealths crack, why go down that path again?


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: '72CudaRacer] #1455056
06/19/13 01:52 AM
06/19/13 01:52 AM
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Posts: 19,317
State of confusion
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Thumperdart Offline
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I`d go E-Brocks but nothing is out of the box in my opinion and mine and many others I know of needed a bit of work.......nothing major though. If you can swing a mild clean up and bowl work and you`re off and runnin.


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: Thumperdart] #1455057
06/19/13 02:28 AM
06/19/13 02:28 AM
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junction city oregon
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viperblue72 Offline
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junction city oregon
I agree that Edelbrock would be a better choice. They also flow better ootb than a stealth. I think the edelbrock ootb will flow about 285 where as the stealth flow 265 iirc. Have you considered the indy ez?

Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: viperblue72] #1455058
06/19/13 07:34 AM
06/19/13 07:34 AM
Joined: Mar 2009
Posts: 2,457
Sydney,Australia
tex013 Offline
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Why not the CNC Stealths ?. Certainly a cost effective choice. I know there have been stealth faults but there has also been eddy faults as well as issues with Indy stuff . I guess it also matters if you get bent up over chinese or usa stuff . I have seen crap from both .
I ran stealths from 2008 no worries , i have just fitted some Modern Stealth cnc heads and am more than happy with the result , i used my own springs retainers . So many people use and recommend Jeff do you think he would dump his reputation if he thought them no good .
My program benefittedvfrom them , for allout race probly not the best . Straight plugs , a big plus . Eddys will probly need longer pushrods extra cost . Flow the same numbers . I don'think you will see much if any performance difference between the two .
My two cents


Tex


New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: '72CudaRacer] #1455059
06/19/13 07:46 AM
06/19/13 07:46 AM
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Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline
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Can you get a single replacement stealth, provided you still have the other one? If not, then it all boils down to what floats your boat. Unless you change a number of things in the combo, low speed torque (launch, traction) won't change much. A bigger port will add more to the upper rpm range, but not too much to the lower rpm range.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: gregsdart] #1455060
06/19/13 08:16 AM
06/19/13 08:16 AM
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Arizona
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Chris'sBarracuda Offline
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Arizona
Quote:

Can you get a single replacement stealth, provided you still have the other one? If not, then it all boils down to what floats your boat. Unless you change a number of things in the combo, low speed torque (launch, traction) won't change much. A bigger port will add more to the upper rpm range, but not too much to the lower rpm range.






.. Or just a pair of bare Stealth heads and put your stuff in them..

Another thought, aren't Indy EZ's were a direct bolt on.. Do they come in a M/W port.?? That might be a thought as well..



Chris..

Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: Chris'sBarracuda] #1455061
06/19/13 09:50 AM
06/19/13 09:50 AM
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junction city oregon
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viperblue72 Offline
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Quote:

Quote:

Can you get a single replacement stealth, provided you still have the other one? If not, then it all boils down to what floats your boat. Unless you change a number of things in the combo, low speed torque (launch, traction) won't change much. A bigger port will add more to the upper rpm range, but not too much to the lower rpm range.






.. Or just a pair of bare Stealth heads and put your stuff in them..

Another thought, aren't Indy EZ's were a direct bolt on.. Do they come in a M/W port.?? That might be a thought as well..



Chris..





I asked that too then realized he has dome pistons, may not work.

Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: '72CudaRacer] #1455062
06/19/13 10:32 AM
06/19/13 10:32 AM
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U.S.S.A.
JohnRR Offline
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JohnRR  Offline
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If you need straight plugs and cost is not a huge factor the MP 452 head is the Ebrock RPM with a straight plug.

No matter which head you buy don't run them out of the box , have the valve job at least fixed .

Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: JohnRR] #1455063
06/19/13 11:16 AM
06/19/13 11:16 AM
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Balt. Md
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383man Offline
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I was going to use the RPM heads but then went and bought the EZ heads from Dwayne Porter. I felt the EZ heads have more overall potential as I may want to step mine up more in the future and I only spent about $300 more to get the EZ heads from Dwayne. Ron

Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: Big Squeeze] #1455064
06/19/13 01:07 PM
06/19/13 01:07 PM

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Quote:

I don't understand the question here???...





Not to tough to figure out.....

Edelbrock heads=$1750, plus need to be checked for guide clearance and valve job

Stealth heads=$1000, plus need to be checked for guide clearance, valve job, and pushrod clearance

CNC Stealth=$2000, Ready to go, checked by Modern Cyl. Head

CNC Stealth is a no-brainer

Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: 383man] #1455065
06/19/13 01:08 PM
06/19/13 01:08 PM
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robin hood country
deaks Offline
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robin hood country
HI Brian
I run MCH RPM's milled to 76 cc, with .590 cam and JE domes in my 440 and a 950 hp holley.
Mick


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
Re: Eldebrock RPM's vs. 440 Source Stealth heads [Re: deaks] #1455066
06/19/13 01:21 PM
06/19/13 01:21 PM
Joined: Apr 2011
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West Palm Beach, Florida
Copper Dart Offline
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Where are the Eddy heads made? Are they not overseas too?

WOW am I Confused!
ricky


Common sense, the least common of all the senses.
Mom.

For fear of ridicule, society stifles creativity.
Ricky Valdes
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