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WHICH ALUMINUM HEADS AND WHY? #1242371
05/30/12 08:09 PM
05/30/12 08:09 PM
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ALBERTA CANADA
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CUDA8U Offline OP
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I've reading many reviews on different aluminum heads with good/bad about them all.

Which heads are best for a 440 street car 550-600hp on pump gas and 3" exhaust....considering a 493 stroker.

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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San Angelo, Texas, U.S.A.
1968RR Offline
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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
Re: WHICH ALUMINUM HEADS AND WHY? [Re: 1968RR] #1242373
05/30/12 08:47 PM
05/30/12 08:47 PM
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I've got Ed heads on a 550 ish HP 496. Well made and compatible with widely available and robust valvetrain and exhaust parts. They do start to run out of airflow capability as you get to 600 HP. If you want best high RPM performance at the 600 HP level one of the bigger or raised port options may be better.

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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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

7228822-savoyburnout.jpg (97 downloads)

64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
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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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

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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Taxes & Virus's R-US, NY
Dragula Offline
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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.


'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk
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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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.
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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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..
Re: WHICH ALUMINUM HEADS AND WHY? [Re: DARTH V8Я] #1242379
05/31/12 12:55 AM
05/31/12 12:55 AM
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sounds like my m1 single plane has to go

Re: WHICH ALUMINUM HEADS AND WHY? [Re: AndyF] #1242380
05/31/12 01:03 AM
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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

Re: WHICH ALUMINUM HEADS AND WHY? [Re: CUDA8U] #1242381
05/31/12 01:06 AM
05/31/12 01:06 AM
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LaRoy Engines Offline
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If you already own a M1 single plane, use it, it will work just fine with the Edelbrock RPM heads on a 493.

Re: WHICH ALUMINUM HEADS AND WHY? [Re: LaRoy Engines] #1242382
05/31/12 01:11 AM
05/31/12 01:11 AM
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isn't the single plane only good til 500hp?

also just realized no one mentioned brodix heads

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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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.

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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LaRoy Engines Offline
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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.

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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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

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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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.

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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Idaho
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LaRoy Engines Offline
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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.

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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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

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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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.

Re: WHICH ALUMINUM HEADS AND WHY? [Re: CUDA8U] #1242390
05/31/12 05:46 AM
05/31/12 05:46 AM
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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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