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Re: ProMaxx Performance 440 heads
[Re: young guns 90s]
#1654595
08/03/14 08:20 PM
08/03/14 08:20 PM
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Joined: Dec 2013
Posts: 403
Romulus, MI
GTS340
mopar
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mopar
Joined: Dec 2013
Posts: 403
Romulus, MI
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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?
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Re: ProMaxx Performance 440 heads
[Re: jamesc]
#1654599
08/03/14 08:55 PM
08/03/14 08:55 PM
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Joined: Dec 2013
Posts: 403
Romulus, MI
GTS340
mopar
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mopar
Joined: Dec 2013
Posts: 403
Romulus, MI
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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
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Re: ProMaxx Performance 440 heads
[Re: jamesc]
#1654601
08/03/14 09:29 PM
08/03/14 09:29 PM
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Joined: Apr 2003
Posts: 13,245
aZLiViN
J_BODY
I Live Here
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I Live Here
Joined: Apr 2003
Posts: 13,245
aZLiViN
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Re: ProMaxx Performance 440 heads
[Re: young guns 90s]
#1654602
08/03/14 09:33 PM
08/03/14 09:33 PM
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Joined: Dec 2006
Posts: 3,416
Pa
Hot 340
master
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master
Joined: Dec 2006
Posts: 3,416
Pa
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Quote:
for price cant beat it
how could you possibly know this without running them?
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Re: ProMaxx Performance 440 heads
[Re: Dunnuck Racing]
#1654604
08/03/14 11:39 PM
08/03/14 11:39 PM
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Joined: Nov 2010
Posts: 914
tn
robnbird
super stock
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super stock
Joined: Nov 2010
Posts: 914
tn
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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 .
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Re: ProMaxx Performance 440 heads
[Re: Dunnuck Racing]
#1654606
08/04/14 12:15 AM
08/04/14 12:15 AM
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Joined: Nov 2010
Posts: 914
tn
robnbird
super stock
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super stock
Joined: Nov 2010
Posts: 914
tn
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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 ?
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Re: ProMaxx Performance 440 heads
[Re: sasquatch]
#1654608
08/04/14 12:43 AM
08/04/14 12:43 AM
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Joined: Nov 2010
Posts: 914
tn
robnbird
super stock
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super stock
Joined: Nov 2010
Posts: 914
tn
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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 .
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Re: ProMaxx Performance 440 heads
[Re: DusterDog]
#1654612
08/08/14 01:29 AM
08/08/14 01:29 AM
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Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
MoparBilly
master
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master
Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
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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
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