Re: WHICH ALUMINUM HEADS AND WHY?
[Re: CUDA8U]
#1242372
05/30/12 08:14 PM
05/30/12 08:14 PM
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Joined: Nov 2005
Posts: 1,943 San Angelo, Texas, U.S.A.
1968RR
top fuel
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top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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While the Edelbrock RPMs may be able to make 600 horsepower, I'd suggest the Indy SRs for that many cubic inches. As I posted earlier today, though, they have raised exhaust ports and require the purchase of TTI headers.
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: ahy]
#1242374
05/30/12 09:11 PM
05/30/12 09:11 PM
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Joined: Dec 2004
Posts: 10,555 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,555
Rittman Ohio
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I have Indy EZ's because they give you more room to grow in the future All the stock intake and exhaust fits along with your rocker gear and holdowns. Buy them from a reputable dealer and have the valve job checked and some good springs and retainers installed. I got mine from Nick Wilson at www.compu-flow.com Nick can also set you up with a good quality 493 stroker kit and cam while you have him on the phone Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: fourgearsavoy]
#1242375
05/30/12 09:13 PM
05/30/12 09:13 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:
I have Indy EZ's because they give you more room to grow in the future All the stock intake and exhaust fits along with your rocker gear and holdowns. Buy them from a reputable dealer and have the valve job checked and some good springs and retainers installed. I got mine from Nick Wilson at www.compu-flow.com Nick can also set you up with a good quality 493 stroker kit and cam while you have him on the phone Gus
I did the same thing but I bought my EZ heads and custom grind cam from Dwayne Porter at Porter racing heads. The stroker kit is from 440Source. Ron
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: fourgearsavoy]
#1242376
05/30/12 09:17 PM
05/30/12 09:17 PM
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Joined: May 2004
Posts: 12,397 Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,397
Taxes & Virus's R-US, NY
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Quote:
I have Indy EZ's because they give you more room to grow in the future All the stock intake and exhaust fits along with your rocker gear and holdowns. Buy them from a reputable dealer and have the valve job checked and some good springs and retainers installed. I got mine from Nick Wilson at www.compu-flow.com Nick can also set you up with a good quality 493 stroker kit and cam while you have him on the phone Gus
Ditto! We run a set, they really fly even when unported.
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: CUDA8U]
#1242377
05/30/12 09:19 PM
05/30/12 09:19 PM
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Joined: Jan 2003
Posts: 31,050 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,050
Oregon
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Edelbrock RPM for a real street car. Indy heads for a race car with license plates. Do you have a copy of my big block book? I covered all the heads choices in the book. http://arengineering.com/home-page/books/
Last edited by AndyF; 05/30/12 09:20 PM.
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: AndyF]
#1242378
05/30/12 11:36 PM
05/30/12 11:36 PM
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Joined: Nov 2011
Posts: 2,154 Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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I'd have to agree with Andy on this one, Performer RPM.. imo the best all round cylinder head. Pretty potent combo with the Performer RPM intake & camshaft package too. And yes, for those who don't have Andy's book, one should buy it.
When it takes more than a sweet mullet to prove you rule at the trailer park..
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: AndyF]
#1242380
05/31/12 01:03 AM
05/31/12 01:03 AM
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Joined: Jun 2011
Posts: 1,039 ALBERTA CANADA
CUDA8U
OP
super stock
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OP
super stock
Joined: Jun 2011
Posts: 1,039
ALBERTA CANADA
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Quote:
Edelbrock RPM for a real street car. Indy heads for a race car with license plates.
Do you have a copy of my big block book? I covered all the heads choices in the book. http://arengineering.com/home-page/books/
is this book fully detailed on assembly?
i'm not a mechanic but have some experience
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: CUDA8U]
#1242383
05/31/12 01:54 AM
05/31/12 01:54 AM
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Joined: Jan 2005
Posts: 4,862 the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
isn't the single plane only good til 500hp?
also just realized no one mentioned brodix heads
Ov all the "cheap" big block aluminum heads out there i still like the Brodix B1BS heads... thats what i bought. They will cost a bit more by the time the car is running... this i wasn't prepared for and it broke my budget, but to most here that wouldn't be a problem. I also think they have the most ultimate potential ov all the heads mentioned.
If i was to buy heads for my next big block build though, i'd go way off the reserve and go with Mopar Stage 6 heads... but i would only buy them from a known builder and only after they've been checked for all the problems they've become known for. I'd also have them ported while they were out.
If i had a lot ov money, i'd find a set ov those Chapman Stage 6 heads and not look back. I'd love to get a set ov those... i might actually want to keep the big block in my car if i had some.
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: CUDA8U]
#1242384
05/31/12 01:57 AM
05/31/12 01:57 AM
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Joined: Oct 2011
Posts: 559 Idaho
LaRoy Engines
mopar
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mopar
Joined: Oct 2011
Posts: 559
Idaho
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Quote:
isn't the single plane only good til 500hp?
also just realized no one mentioned brodix heads
From personal experience:
M1 single plane 850 cfm Mighty Demon 451 cubic inch stroker, 9.5:1 compression 452 ported factory IRON heads 295 cfm @ .700" Comp solid street roller 256/260 @ .050", .600" lift 621 HP @ 6100 rpm and 588 TQ @ 4600 rpm
Brodix heads, ah, way expensive for the same or less flow out of the box as the RPM head.
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: LaRoy Engines]
#1242385
05/31/12 02:17 AM
05/31/12 02:17 AM
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Joined: Jun 2011
Posts: 1,039 ALBERTA CANADA
CUDA8U
OP
super stock
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OP
super stock
Joined: Jun 2011
Posts: 1,039
ALBERTA CANADA
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Quote:
Quote:
isn't the single plane only good til 500hp?
also just realized no one mentioned brodix heads
From personal experience:
M1 single plane 850 cfm Mighty Demon 451 cubic inch stroker, 9.5:1 compression 452 ported factory IRON heads 295 cfm @ .700"
just bought my holley 850 and my heads are STAGE 1 MUSCLE MOTORS "STREET KILLER" 250 cfm @ .500 LIFT ,CAST HEAD
10:1 COPRESSION COMP CAM 21-224-4 M1 SINGLE PLANE ROSS FLAT TOPS CAT RODS
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: LaRoy Engines]
#1242386
05/31/12 02:37 AM
05/31/12 02:37 AM
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Joined: Jan 2005
Posts: 4,862 the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
Quote:
isn't the single plane only good til 500hp?
also just realized no one mentioned brodix heads
From personal experience:
M1 single plane 850 cfm Mighty Demon 451 cubic inch stroker, 9.5:1 compression 452 ported factory IRON heads 295 cfm @ .700" Comp solid street roller 256/260 @ .050", .600" lift 621 HP @ 6100 rpm and 588 TQ @ 4600 rpm
Brodix heads, ah, way expensive for the same or less flow out of the box as the RPM head.
Flow is not everything. There is a lot more to making big power than just flow. Chamber design is a big deal i think, and in that Edelbrock is most definitely a compromise design. One thing i dont like about the B1's was the weight... they're not much lighter than the iron... you save only 14lbs per set! Its great that they're such a stout, well-built head, and that they can be taken quite far, but weight-savings is important too.
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: CUDA8U]
#1242387
05/31/12 02:45 AM
05/31/12 02:45 AM
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Joined: Oct 2011
Posts: 559 Idaho
LaRoy Engines
mopar
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mopar
Joined: Oct 2011
Posts: 559
Idaho
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Quote:
Quote:
Quote:
isn't the single plane only good til 500hp?
also just realized no one mentioned brodix heads
From personal experience:
M1 single plane 850 cfm Mighty Demon 451 cubic inch stroker, 9.5:1 compression 452 ported factory IRON heads 295 cfm @ .700"
just bought my holley 850 and my heads are STAGE 1 MUSCLE MOTORS "STREET KILLER" 250 cfm @ .500 LIFT ,CAST HEAD
10:1 COPRESSION COMP CAM 21-224-4 M1 SINGLE PLANE ROSS FLAT TOPS CAT RODS
In what application are you using these "STREET KILLER" heads? They would be a little soft for a big 493 street stroker.
The ones we ported were 90 cfm @ .100", 166 @ .200", 218 @ .300", 255 @ .400", 278 @ .500", 288 @ .600" and 295 @ .700".
As your stated goal was 550-600HP the RPM head is fine for a 493. The RPM heads do have the potential to go 750+ HP with good porting, but if you ever plan on that much horsepower, you would be better to start with a better head than the RPM.
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: LaRoy Engines]
#1242388
05/31/12 03:07 AM
05/31/12 03:07 AM
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Joined: Jan 2003
Posts: 5,875 communist bloc of new jersey
jamesc
master
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master
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
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Quote:
isn't the single plane only good til 500hp?
where does this come from? i admit my engine is nothing outstanding and the car is light but a mild flat tappet 451 by a backyard hack running 162 mph with that (stock) manifold has to be doing better than 500. this is with <11:1 CR, rpm heads and a .585" flat tappet. what would it do with tweaked 13:1 roller and better heads? imho the m1 flange manifold goes to 650 with no extravagant measures.
as to the original question imho the rpm head fills more voids than ANY other bb chrysler head offered. with the right selection of parts this is a 600 hp head all day long at a reasonable price point, a minor cleanup/backcut would be beneficial
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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: CUDA8U]
#1242389
05/31/12 05:01 AM
05/31/12 05:01 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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550-600 HP with a stroker can be done somewhat easy with the Edelbrock RPM, or 440 Source Stealth, but they won't have much room to grow if you want more power. Those heads are good for lower cost street applications, they both use stock offset rockers, and have fairly large 80-84cc chamber volume. The large chamber volume helps lower compression for a street engine, even though a stroker may still need dished pistons depending on the compression ratio your looking for. The Victor heads have smaller chambers (I think 74cc) and better ports, but take offset rockers, and raised exhaust ports. The intake ports are raised also, but will still accept a standard intake. The B-1 B/S heads have small 65cc chambers which would put compression around 14:1 or Higher with flat top pistons. They are well sized for the 440 and 451 bracket engines where a flat top piston will get about 13:1 compression. The B-1 B/S heads flow about what the RPM heads do out of the box. I think a ported B-1 B/S will flow a bit more than a ported RPM head, but it requires an offset intake rocker, and the exhaust ports are raised (I think more than the Victor heads?) The issue with the raised ports relates to header selection. On a low deck engine you may be able to use 440 headers, but on a raised deck, you may have to use the specific TTI headers or custom headers. I haven't keept up with all the variations of Indy heads, so I'll leave that to those who know them better.
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