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Re: ProMaxx Performance 440 heads
[Re: Blown 68 R/T]
#1654614
09/30/14 06:49 PM
09/30/14 06:49 PM
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Joined: Oct 2013
Posts: 3
Ky
Skynyrd
member
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member
Joined: Oct 2013
Posts: 3
Ky
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I purchased mine from Hensley Racing . About two months ago. Makes great power. Had a medium Port job done. Ken Hensley said they flow better than similar aluminum heads. Rpm etc. Before any work. I have the full Info. Somewhere.
74 Plymouth Duster , 312/590 mopar purple cam. Forged pistons, h beam rods. 1050 dominator. Hooker super comp. Headers.
440 30 over. After about 20 1/8 runs
Low 6.50s. I don't think it's realizing full potential yet. Made in USA.
Last edited by Skynyrd; 09/30/14 08:32 PM.
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Re: ProMaxx Performance 440 heads
[Re: DGS]
#1654617
10/01/14 08:08 AM
10/01/14 08:08 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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We recently did a maxed out full port on the Sidewinders ( same head I believe) and the results were right at 313 CFM intake on a Very correct , calibrated, stingy bench. I am sure as time rolls on and more heads are whittled on that it will get better but honest, this is a street strip head not intended to go toe to toe with Victors, Indys etc It is designed to be an Edelbrock killer and I guess you need a "Sidewinder" to shoot at Stealths? So far---I have done several strong street engines with these heads --ZERO issues--I love the casting quality and the seats and guides are some of the best on the market --ports are more equal on these than other brands as well. We have a regular old 440 flat top headed to the dyno soon with a set and a hyd cam so will report. I love the quality for the $$ and feel like they are the best answer out there for a street/strip big block--way less than Edelbrocks and IMO better overall quality than everything else. Want to race hard and go really fast? Sure, there are better choices but these heads will do anything an Edelbrock Performer head can for LESS $$ and at 313 CFM--Surprise many a bracket racer!! Now...spending the loot it takes to get 313 CFM range--on a street head? Well... that is up to the individual, and a real race head may be better choice but...the heads are VERY capable of some Serious HP! So far....I LOVE these heads! 
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Re: ProMaxx Performance 440 heads
[Re: DGS]
#1654621
10/01/14 02:13 PM
10/01/14 02:13 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:
Quote:
I believe in either this month or last months Mopar Muscle they did a 451 build and use the ProMax heads. I dont remember all the details but I think they flowed around 340 on the intakes ? I know the eng made very good hp (like 675 I think) and torque. I will try to look it up when I get a chance. Ron
They used ProComp heads (Victor copy?): http://www.moparmusclemagazine.com/techarticles/1411_randy_maliks_452ci_low_deck_wedge_mopar_engine/
Opps. Thanks for the correction. Sorry about that. Ron
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Re: ProMaxx Performance 440 heads
[Re: hudsonhornet7x]
#1654623
10/01/14 06:22 PM
10/01/14 06:22 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
What do out of the box standard port victors flow? I know they are designed for something different than sidewinders but how do they compare?
"It depends..." It's not just variance between castings, but also the last generation Victors that came out in late 2011 (IIRC) got a better designed chamber (in theory), but a more restrictive intake port that is nowhere near as good as the original version in terms of basic flow #s.
The Procomps in the article linked above are seriously NOT stock, between MCH's CNC MW porting, plus Malik's filling of the port floor, etc. I've got a Procomp I've used as a "crash test dummy" for some porting and with a good valve job and an otherwise stock casting flowed 310-315 IIRC. I've done some basic porting while keeping pretty close to a standard port entry (nowhere near MW size) and pushed them to 340+ at .700". There are some old threads on here from right about a year ago where I posted those results, FWIW.
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Re: ProMaxx Performance 440 heads
[Re: dogdays]
#1654624
11/05/14 05:38 PM
11/05/14 05:38 PM
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Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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Quote:
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.
^^^^^^^^^^This. ProMaxx, formerly Patriot Performance is located in Rainbow City Alabama. Been there a long time and is not going away anytime soon. Before it was Patriot, it was Alabama Cylinder Head, which has been in business for decades. When they moved more focus towards performance, it was renamed Patriot by then owner and before that, long time employee, Marty Witt. The company was recently sold to another individual, who changed the name to ProMaxx, but all the same people, including Marty Witt, still work there. All machine operation are done in house in Alabama and they have some very nice and very up to date equipment, with guys who can run it.
Monte
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Re: ProMaxx Performance 440 heads
[Re: RAMM]
#1654631
11/09/14 11:02 AM
11/09/14 11:02 AM
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Joined: Jul 2003
Posts: 4,849
Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,849
Holland MI Ottawa
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Why do most mfgrs of aluminum heads have the ends milled flat and polished? Is this to have a clear and readable logo?
Keep old mopars alive.
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Re: ProMaxx Performance 440 heads
[Re: 2boltmain]
#1654632
11/27/14 11:36 AM
11/27/14 11:36 AM
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Joined: Jan 2003
Posts: 1,420
Johnstown
69dart
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,420
Johnstown
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Jegs has these heads ON SALE today. JEGS I may have to try a set at those prices!!!
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