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ProMaxx Performance 440 heads #1654594
08/03/14 07:16 PM
08/03/14 07:16 PM
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Alabama
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young guns 90s Offline OP
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Alabama
any buddy use ProMaxx Performance 9440 - ProMaxx MAXX Series Big Block Chrysler Aluminum Cylinder Heads Details

Big Block Chrysler 210cc/295+ CFM Additional Cylinder Head Specifications
Valve Angle: 15° Valve Seal Material: Viton Spark Plug Type: Angled Retainer Material: Steel Maximum Spring Lift: .600" Hydraulic Flat Tappet think about use them on 66 440 factory steel crank factory steel rods lighten polish with JE or ROSS pistons full floating pins

8228915-723-9440_6.jpg (4360 downloads)
Re: ProMaxx Performance 440 heads [Re: young guns 90s] #1654595
08/03/14 09:20 PM
08/03/14 09:20 PM
Joined: Dec 2013
Posts: 403
Romulus, MI
GTS340 Offline
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Romulus, MI
Quote:

any buddy use ProMaxx Performance 9440 - ProMaxx MAXX Series Big Block Chrysler Aluminum Cylinder Heads Details

Big Block Chrysler 210cc/295+ CFM Additional Cylinder Head Specifications
Valve Angle: 15° Valve Seal Material: Viton Spark Plug Type: Angled Retainer Material: Steel Maximum Spring Lift: .600" Hydraulic Flat Tappet think about use them on 66 440 factory steel crank factory steel rods lighten polish with JE or ROSS pistons full floating pins




Looks a lot like Edelbrock Performer RPM 440 head. I wonder if it's just Promaxx working a set of the sidewinder castings?

Re: ProMaxx Performance 440 heads [Re: GTS340] #1654596
08/03/14 09:31 PM
08/03/14 09:31 PM
Joined: Jul 2014
Posts: 14
Alabama
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young guns 90s Offline OP
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Alabama
i have no clue i know heads are standard port flow at 295 cfm on intake side for price cant beat it better then 440 source heads

Re: ProMaxx Performance 440 heads [Re: young guns 90s] #1654597
08/03/14 09:38 PM
08/03/14 09:38 PM
Joined: Dec 2013
Posts: 403
Romulus, MI
GTS340 Offline
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Really? From where? I thought Jegs had them priced very similar to the Edelbrock.

Re: ProMaxx Performance 440 heads [Re: GTS340] #1654598
08/03/14 09:51 PM
08/03/14 09:51 PM
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communist bloc of new jersey
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jamesc Offline
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i'm not certain but looked around a little bit and am inclined to believe they're imported castings, i could be wrong. that said if they are imported for that money i'd pony up the rest and buy a USA made head but that's just me. they actually cost more than the 75cc e street heads with the racer discount

Re: ProMaxx Performance 440 heads [Re: jamesc] #1654599
08/03/14 09:55 PM
08/03/14 09:55 PM
Joined: Dec 2013
Posts: 403
Romulus, MI
GTS340 Offline
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Quote:

i'm not certain but looked around a little bit and am inclined to believe they're imported castings, i could be wrong. that said if they are imported for that money i'd pony up the rest and buy a USA made head but that's just me. they actually cost more than the 75cc e street heads with the racer discount




You have a PM

Re: ProMaxx Performance 440 heads [Re: GTS340] #1654600
08/03/14 10:20 PM
08/03/14 10:20 PM
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communist bloc of new jersey
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jamesc Offline
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Quote:

You have a PM




so do you

Re: ProMaxx Performance 440 heads [Re: jamesc] #1654601
08/03/14 10:29 PM
08/03/14 10:29 PM
Joined: May 2003
Posts: 13,182
aZLiViN
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J_BODY Offline
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aZLiViN
I have no pm.

Re: ProMaxx Performance 440 heads [Re: young guns 90s] #1654602
08/03/14 10:33 PM
08/03/14 10:33 PM
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Hot 340 Offline
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Quote:

for price cant beat it


how could you possibly know this without running them?

Re: ProMaxx Performance 440 heads [Re: GTS340] #1654603
08/03/14 10:49 PM
08/03/14 10:49 PM
Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing Offline
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Northern Indiana
Promaxx doesn't buy castings from the guys selling Sidewinder heads, that much I know.
RPM heads and Stealth heads both flow much less than advertised on a calibrated bench. Sidewinder heads will out flow those two castings out of the box.
I don't know how these Promaxx compare
Keith

Re: ProMaxx Performance 440 heads [Re: Dunnuck Racing] #1654604
08/04/14 12:39 AM
08/04/14 12:39 AM
Joined: Nov 2010
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tn
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robnbird Offline
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Quote:

Promaxx doesn't buy castings from the guys selling Sidewinder heads, that much I know.
RPM heads and Stealth heads both flow much less than advertised on a calibrated bench. Sidewinder heads will out flow those two castings out of the box.
I don't know how these Promaxx compare
Keith


where can they be bought .

Re: ProMaxx Performance 440 heads [Re: robnbird] #1654605
08/04/14 12:55 AM
08/04/14 12:55 AM
Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing Offline
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Northern Indiana
The Sidewinder heads can be bought through Todd at CompWedge Engines, or I can get them. There are a couple other builders selling them also . They really are a nice part .
I have a build in the works with a set now. More consistent port shape and size when compared to other brands I have used.
Keith

Re: ProMaxx Performance 440 heads [Re: Dunnuck Racing] #1654606
08/04/14 01:15 AM
08/04/14 01:15 AM
Joined: Nov 2010
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robnbird Offline
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Quote:

The Sidewinder heads can be bought through Todd at CompWedge Engines, or I can get them. There are a couple other builders selling them also . They really are a nice part .
I have a build in the works with a set now. More consistent port shape and size when compared to other brands I have used.
Keith


how are these compared to the Eddy victor max wedge ?

Re: ProMaxx Performance 440 heads [Re: robnbird] #1654607
08/04/14 01:19 AM
08/04/14 01:19 AM
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North Carolina
sasquatch Offline
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Guys as far as I know the Promax and the sidewinder are the same casting. Robin they will not touch a Victor. These are much more akin to the RPM. Todd

Re: ProMaxx Performance 440 heads [Re: sasquatch] #1654608
08/04/14 01:43 AM
08/04/14 01:43 AM
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Posts: 914
tn
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robnbird Offline
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Quote:

Guys as far as I know the Promax and the sidewinder are the same casting. Robin they will not touch a Victor. These are much more akin to the RPM. Todd


OK thanks Todd , I am going to order the eddy max wedge tomorrow but going to use the Indy 400-3 intake .

Re: ProMaxx Performance 440 heads [Re: Dunnuck Racing] #1654609
08/04/14 01:22 PM
08/04/14 01:22 PM
Joined: Jun 2006
Posts: 5,155
CT
GTX MATT Offline
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Quote:

RPM heads and Stealth heads both flow much less than advertised on a calibrated bench.




A truer statement on Moparts I have not heard


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: ProMaxx Performance 440 heads [Re: GTX MATT] #1654610
08/04/14 02:44 PM
08/04/14 02:44 PM
Joined: Jan 2003
Posts: 16,376
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dogdays Offline
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Remember a few years ago, a new US cylinderhead company called Patriot? They staked out the lower edge of the smallblock chevy market, made a decent aluminum head which got a lot of press because it was good but inexpensive.

Somewhere along the way they were bought and renamed as ProMaxx.

As their sbc and sbf heads were pretty good, I would guess that their BBM heads would be good too.

R.

Re: ProMaxx Performance 440 heads [Re: young guns 90s] #1654611
08/07/14 11:08 PM
08/07/14 11:08 PM
Joined: Aug 2003
Posts: 1,269
Way out in the sticks of Weste...
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DusterDog Offline
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Way out in the sticks of Weste...
Hey Kenny,

I sent you a PM!!!!!


"I've upped my horsepower, so...... UP YOURS!!!"
Re: ProMaxx Performance 440 heads [Re: DusterDog] #1654612
08/08/14 02:29 AM
08/08/14 02:29 AM
Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
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MoparBilly Offline
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Phoenix, AZ
So...are these gonna stick around longer than the BullDog heads?? Or just the next flash in the pan.


"Livin' in a powder keg and givin' off sparks" 4 Street cars, 5 Race engines
Re: ProMaxx Performance 440 heads [Re: MoparBilly] #1654613
09/17/14 10:30 PM
09/17/14 10:30 PM
Joined: Jan 2003
Posts: 525
Shannonville, Ont
Blown 68 R/T Offline
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Shannonville, Ont
So I take it no one has tried these ProMaxx heads like the op was asking?

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