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Re: WHICH ALUMINUM HEADS AND WHY? [Re: LaRoy Engines] #1242391
05/31/12 10:34 AM
05/31/12 10:34 AM
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ALBERTA CANADA
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CUDA8U Offline OP
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Quote:

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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.




the street killer cast heads are on there now and this is why i'm asking about aluminum heads,i know i can't reach my goal with these heads

Re: WHICH ALUMINUM HEADS AND WHY? [Re: CUDA8U] #1242392
05/31/12 12:25 PM
05/31/12 12:25 PM
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Bend,OR USA
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I've dyno and raced motors with ported stock cast iron heads, stock Eddy RPM, CNC ported Eddy RPM, small 440 standard ports B1-BS, same B1-BS heads CNC ported to M.W., Indy SR with M.W. ports and 440-1 CNC ported. If you want more power later buy the best heads you can afford now, at least with M.W. port sizes


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: WHICH ALUMINUM HEADS AND WHY? [Re: alice] #1242393
05/31/12 01:10 PM
05/31/12 01:10 PM
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Kelowna, B.C. Canada
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Quote:

set ov those




PLEASE tell me that was a slip of the finger and we don't have two of you now that can't spell OF!


Dave


1970 Super Bee 440 Six Pack 1974 'Cuda 2008 Ram 3500 Diesel 2006 Ram 3500 Diesel 2004.5 Ram 2500 Diesel 2003 Ram 3500 Diesel 2006 Durango Limited [url] http://1970superbee.piczo.com [/url]
Re: WHICH ALUMINUM HEADS AND WHY? [Re: DPelletier] #1242394
05/31/12 04:49 PM
05/31/12 04:49 PM
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so it sounds like most are suggesting the eddy rpm heads.The fact that i don't have to buy after market valley pan,intake and headers is appealing.The only thing i've read is that the valve seating/alignment is off along with rockers....not sure

i am considering the TTI headers though.

600hp would be my max since i don't plan on sittin at the track all the time,i like to cruise.Pump gas is a must since the $$$$$ for it is already crazy.

Since my diff(742 case) is stock and i think the trans(both rebuilt) what would i have to upgrade on these to handle 550-600hp?

i'm running street tires so real hard hook ups probably won't happen.

Re: WHICH ALUMINUM HEADS AND WHY? [Re: CUDA8U] #1242395
05/31/12 07:09 PM
05/31/12 07:09 PM
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Holly/MI
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Quote:

so it sounds like most are suggesting the eddy rpm heads.




Not me!

470 cubes or less......Stage VI MP (standard rocker offset)

493 stroker or more........Indy EZ's w/max wedge porting (easy header fitment)

That's what I have ended up with once I started looking for some cylinder heads.


R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04
Re: WHICH ALUMINUM HEADS AND WHY? [Re: Dean_Kuzluzski] #1242396
05/31/12 08:25 PM
05/31/12 08:25 PM
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NotRussia
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RPMs are about $1400.

What about ported Stealths? I figure they would come around $1400 as well, but would it flow more than stock box RPMs?

I know folks here bash 'em, but at least they look like stock iron heads.


Guess no one has tried the Super Stealths yet. I figure that would run about $1700-2k done?

Re: WHICH ALUMINUM HEADS AND WHY? [Re: CUDA8U] #1242397
05/31/12 10:02 PM
05/31/12 10:02 PM
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Quote:

so it sounds like most are suggesting the eddy rpm heads.The fact that i don't have to buy after market valley pan,intake and headers is appealing.The only thing i've read is that the valve seating/alignment is off along with rockers....not sure

i am considering the TTI headers though.

600hp would be my max since i don't plan on sittin at the track all the time,i like to cruise.Pump gas is a must since the $$$$$ for it is already crazy.

Since my diff(742 case) is stock and i think the trans(both rebuilt) what would i have to upgrade on these to handle 550-600hp?

i'm running street tires so real hard hook ups probably won't happen.




On the valve alignment, its pretty common with any aftermarket heads or even stock heads with aftermarket rockers to need adjustment. On my Eddy's with Comp pro-magnum rockers, sweep over the valve was near perfect. Alignment along the shaft needed some tweaking. I had my MP aluminum hold downs milled a little on the sides to create extra clearance then used a couple packs of rocker shaft shims to dial in the rocker tip position.

The transmission and rear end should be fine on street tires. If you run slicks and hook, the rear is probably not going to be happy.

Re: WHICH ALUMINUM HEADS AND WHY? [Re: 2fast4yourBrain] #1242398
05/31/12 10:52 PM
05/31/12 10:52 PM
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Rittman Ohio
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Quote:

RPMs are about $1400.

What about ported Stealths? I figure they would come around $1400 as well, but would it flow more than stock box RPMs?

I know folks here bash 'em, but at least they look like stock iron heads.


Guess no one has tried the Super Stealths yet. I figure that would run about $1700-2k done?



Still not as good a deal as a set of EZ's that really respond to a minor cleanup with stock port window.You can get them around $2000.00 give or take a few hun depending on who you get them from.Open them up to Max-Wedge port and then you really have a nice head
I use a Performer RPM with a pretty mild flat cam and they really pull hard down low with a 5-speed with some nice gearing
Gus

7230405-savoyburnout.jpg (52 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] #1242399
06/01/12 12:38 AM
06/01/12 12:38 AM
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thanks everyone!!!

i hate to drag this post on or start another but one more question

what can i expect to pay to match port my m1 to a set of heads?

Re: WHICH ALUMINUM HEADS AND WHY? [Re: fourgearsavoy] #1242400
06/01/12 10:41 AM
06/01/12 10:41 AM
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West Plains, MO
DrCharles Offline
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Quote:

Quote:

What about ported Stealths? I figure they would come around $1400 as well, but would it flow more than stock box RPMs?




Still not as good a deal as a set of EZ's that really respond to a minor cleanup with stock port window.You can get them around $2000.00 give or take a few hun depending on who you get them from.




The CNC-ported Stealths are $2000 a pair from 440source and the flow table looks good, 321 cfm at .650-up lift... how do the EZ's compare if they're the same price?

Re: WHICH ALUMINUM HEADS AND WHY? [Re: DrCharles] #1242401
06/01/12 12:10 PM
06/01/12 12:10 PM
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383man Offline
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Quote:

Quote:

Quote:

What about ported Stealths? I figure they would come around $1400 as well, but would it flow more than stock box RPMs?




Still not as good a deal as a set of EZ's that really respond to a minor cleanup with stock port window.You can get them around $2000.00 give or take a few hun depending on who you get them from.




The CNC-ported Stealths are $2000 a pair from 440source and the flow table looks good, 321 cfm at .650-up lift... how do the EZ's compare if they're the same price?




My EZ's are not CNC ported as they were just cleaned up a bit. They are Max Wedge size and flow 340 @ .650. But I am surprised to see Steaths flow 321 @ .650 as I have not heard of them flowing that good. Ron

Re: WHICH ALUMINUM HEADS AND WHY? [Re: 2fast4yourBrain] #1242402
06/01/12 12:25 PM
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Kelowna, B.C. Canada
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Quote:

RPMs are about $1400.

What about ported Stealths? I figure they would come around $1400 as well, but would it flow more than stock box RPMs?

I know folks here bash 'em, but at least they look like stock iron heads.







Those are what I'd buy for a strong street engine; good performance with a stock look all painted up =


Dave


1970 Super Bee 440 Six Pack 1974 'Cuda 2008 Ram 3500 Diesel 2006 Ram 3500 Diesel 2004.5 Ram 2500 Diesel 2003 Ram 3500 Diesel 2006 Durango Limited [url] http://1970superbee.piczo.com [/url]
Re: WHICH ALUMINUM HEADS AND WHY? [Re: DPelletier] #1242403
06/01/12 12:36 PM
06/01/12 12:36 PM
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Vista, California
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Has anyone here bolted the $1000 Stealths on right out of the box? I know it's not the best, but I'd be interested in hearing reports of taking the Stealths and bolting right them on and going...

Re: WHICH ALUMINUM HEADS AND WHY? [Re: 383man] #1242404
06/01/12 01:48 PM
06/01/12 01:48 PM
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Idaho
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LaRoy Engines Offline
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Quote:

Quote:

Quote:

Quote:

What about ported Stealths? I figure they would come around $1400 as well, but would it flow more than stock box RPMs?




Still not as good a deal as a set of EZ's that really respond to a minor cleanup with stock port window.You can get them around $2000.00 give or take a few hun depending on who you get them from.




The CNC-ported Stealths are $2000 a pair from 440source and the flow table looks good, 321 cfm at .650-up lift... how do the EZ's compare if they're the same price?




My EZ's are not CNC ported as they were just cleaned up a bit. They are Max Wedge size and flow 340 @ .650. But I am surprised to see Steaths flow 321 @ .650 as I have not heard of them flowing that good. Ron




Here are the flows from our bench on the out-of-the-box standard Stealth and then after some serious porting. It is why I say if you already have ANY aftermarket aluminum head, you don't need to buy another head to get 750 HP. Why buy another head that you will still have to port to get 750 HP if you already own a set of aluminum heads? If the Stealths can do it, which heads can't?

Lift.........OOTB Stealth......LaRoy Ported Stealth

.100"...........66....................71cfm
.200"..........142...................153
.300"..........205...................217
.400"..........240...................265
.450"..................................287
.500"..........255...................301
.550"..................................325
.600"..........267...................333
.650"..................................339
.700"..........268...................344
.750"..................................348

Re: WHICH ALUMINUM HEADS AND WHY? [Re: LaRoy Engines] #1242405
06/01/12 02:31 PM
06/01/12 02:31 PM
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Nebraska
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Chapman stage 6s. Oh crap they don't make them anymore

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