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FE Power Forums => FE Technical Forum => Topic started by: cattleFEeder on November 24, 2015, 08:25:45 PM

Title: Pro Maxx Heads
Post by: cattleFEeder on November 24, 2015, 08:25:45 PM

http://www.jegs.com/p/ProMaxx-Performance/ProMaxx-MAXX-Series-Ford-FE-Aluminum-Cylinder-Heads/3462220/10002/-1

What am I missing, have these heads been out for a while? I never heard of them.

Title: Re: Pro Maxx Heads
Post by: cjshaker on November 24, 2015, 08:35:08 PM

They have been discussed a couple of times and are basically considered over-seas knockoffs of the Edelbrock head. Notice the "Assembled in USA", but nowhere does it say "Made". I don't know specifically when they came out but I first started seeing them about a year ago. Heat treatment has been the issue in question because as far as I know nobody can find any info about it.

Title: Re: Pro Maxx Heads
Post by: ScotiaFE on November 24, 2015, 09:31:45 PM

According to the ad blurb it calls A356 T6.
A356 is the alloy mix and T6 is the heat treatment.
Which is standardish for this type of casting.
The T6 is an oven bake for X hours and then a water quench.
Not that hard to do the heat treatment.
If anything the purity of the mix would be the problem.
Skanky aluminum does not cast well.  ;)
An easy test to see how hard they are.
Tempting prices though.

Title: Re: Pro Maxx Heads
Post by: Barry_R on November 24, 2015, 09:42:22 PM

For $100-200 cost savings compared to Edelbrocks you get a Chinese casting of unknowable origins, engineering, and quality.
They appear to be the same "Steven's" heads we've seen making the rounds.
Edelbrock knock offs without the quality control and no performance advantage.
That's about darn near almost 9%.... Seems like a big risk to take for a modest financial reward.

Title: Re: Pro Maxx Heads
Post by: blykins on November 25, 2015, 11:57:57 AM

They sent me a set to check out.  Look exactly like edelbrocks. 

Amen to Barry's comments.

Title: Re: Pro Maxx Heads
Post by: fekbmax on November 25, 2015, 12:11:36 PM

Where are BBM heads and blocks cast ?  I'm sure there's a thread and you guys have been over that. Where are the side oiler garage blocks cast ?

Title: Re: Pro Maxx Heads
Post by: turbohunter on November 25, 2015, 12:25:25 PM

Question 1 - Korea
Question 2 - USA

Title: Re: Pro Maxx Heads
Post by: fekbmax on November 25, 2015, 01:04:39 PM

Hummmm,  OK thanks.

Title: Re: Pro Maxx Heads
Post by: TomP on November 25, 2015, 07:23:09 PM

Twenty different part numbers and versions, wonder how many they sell?

Title: Re: Pro Maxx Heads
Post by: gdaddy01 on November 25, 2015, 07:29:13 PM

THANK YOU BARRY

Title: Re: Pro Maxx Heads
Post by: 66FAIRLANE on November 25, 2015, 08:04:08 PM

Quote from: ScotiaFE on November 24, 2015, 09:31:45 PM

An easy test to see how hard they are.

Still wouldn't trust them. My experience buying out of China (tier 1 OEM supplier) says that just because one part is 'XX' doesn't mean the next one or next 5000 will be.

Title: Pro Maxx Heads use to be Patriot
Post by: Ford428CJ on December 03, 2015, 08:42:31 AM

At least the Chevy stuff and what not before use to be Patriot.

Talked with the owner Jason (I do believe that's his name) about those heads and the others. Yes they come from Stevens as  mentioned above. Supposedly Jason does the rest the stuff all in house. Just thought I'd share the info

Title: Re: Pro Maxx Heads
Post by: chris_r on December 03, 2015, 09:20:07 PM

I have three fe engines running with the Pro Maxx heads. I get just bare castings from Jason and built them. The casting its self is very smooth looks good. The casting is hard i have ported on them its a hard cut.

Title: n/m
Post by: Qikbbstang on December 05, 2015, 08:06:04 PM

General Engine Building Question -- Noticed claims: ".700'' Max Lift Hydraulic Roller Springs"
 aren't you better running springs that are close to coil bind to help control harmonics?

MAXX Series Aluminum Cylinder Heads
•.700'' Max Lift Hydraulic Roller Springs

Title: Re: n/m
Post by: gordonr390 on December 05, 2015, 09:19:57 PM

Quote from: Qikbbstang on December 05, 2015, 08:06:04 PM

General Engine Building Question -- Noticed claims: ".700'' Max Lift Hydraulic Roller Springs"
 aren't you better running springs that are close to coil bind to help control harmonics?

MAXX Series Aluminum Cylinder Heads
•.700'' Max Lift Hydraulic Roller Springs

.050-.060 is the norm. Their specs are merely stating that the install height is set for a .700" lift @the valve.

Title: Re: Pro Maxx Heads
Post by: Barry_R on December 06, 2015, 10:00:53 AM

I want to watch that .700 lift hyd roller on the dyno....

Title: Re: Pro Maxx Heads
Post by: blykins on December 06, 2015, 10:32:51 AM

I think I have a couple of .660" HR's out there, but no .700"s.....