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-   -   Promaxx Heads (https://www.offshoreonly.com/forums/general-q/384694-promaxx-heads.html)

Wildman_grafix 02-04-2025 08:58 AM


Originally Posted by TeamSaris (Post 4919554)
Bang for the buck they are some of the best heads out there. Jason and his team at promaxx (in alabama) are also great people. They also do awesome repairs on all makes of head. I have race teams with more than one championship on promaxx heads. If you arent buying dart, brodix, or profiler, buy promaxx and be happy.

I noticed AFR missing from that list?

Padraig 02-04-2025 10:54 AM


Originally Posted by Wildman_grafix (Post 4919559)
I noticed AFR missing from that list?

I do know that Saris is using AFR heads on my 540 build.

Padraig

TeamSaris 02-04-2025 11:27 AM


Originally Posted by Wildman_grafix (Post 4919559)
I noticed AFR missing from that list?

Not on purpose. I have AFRs on the engine in my boat, and our race boat. They're an awesome product.

Wildman_grafix 02-04-2025 12:34 PM


Originally Posted by TeamSaris (Post 4919570)
Not on purpose. I have AFRs on the engine in my boat, and our race boat. They're an awesome product.

Ok Thanks, was wondering.

JaniH 02-10-2025 02:14 PM


Originally Posted by Tartilla (Post 4919425)
Not bad considering they're $1500+ bare.

The 317s flow really well and have a stable port. The 290s aren't as good in that regard. Despite being a bit smaller. A well matched cam and intake will minimize the issue.

flotek/promax 290cc good port is turbulent out of the box, reshaping the head bolt pump inside the port fixed the problem in flotek 290cc heads.

Rookie 02-10-2025 07:19 PM


Originally Posted by JaniH (Post 4920011)
flotek/promax 290cc good port is turbulent out of the box, reshaping the head bolt pump inside the port fixed the problem in flotek 290cc heads.

Please don't confuse flotek and Promaxx heads.
2 different heads...

Jim Diesel 02-11-2025 05:49 AM


Originally Posted by SkiDoc (Post 4919545)
Post some photos Jim!

Here you go, build thread below. These made 766HP/760TQ at 4.2 PSI Boost.

https://www.offshoreonly.com/forums/...tered-gun.html

https://cimg6.ibsrv.net/gimg/www.off...bbef685180.jpg

JaniH 02-11-2025 07:53 AM


Originally Posted by Rookie (Post 4920036)
Please don't confuse flotek and Promaxx heads.
2 different heads...

To different brands, same head. Both are Steven sun castings from china.

SkiDoc 02-11-2025 09:11 AM

Jim beautiful!

87CigCafe 02-15-2025 06:48 PM

Have had great results
 
I had great results with my 317’s built to marine specs!
https://cimg2.ibsrv.net/gimg/www.off...b908fd357.jpeg


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