speedmaster aluminum heads and roller rockers

[RustyCrankshaft]

True you are in the UK and any head will be "overseas". I guess the real question is do you want to spend money on a gamble you'll get a useable part from Speedmaster (my personal experience is that's a poor bet), and even though everything for you is overseas would you prefer to spend your money with a country that hates you, or one that is friendly?

There are better options available. Since everything will have to be freighted to you, there are lots of good used Edelbrocks or similar if you aren't in a hurry.

Although I try to avoid chinese stuff when possible, it isn't always. At least outfits like Scat are ding their own quality control and machining. Speedmaster is just terrible in every respect.

I do have to give credit to Summit for fixing the issue. Not that they aren't without flaws, but Summit is at least still a privately held company that does a pretty good job in the modern world of keeping their business here compared to selling to some investment company.

[e philpott]

Promaxx heads are pretty decent, they put quality valves in them and the machine work is nice or it least a set of SBC that we installed for a customer were,, our local machine shop was impressed with the off shore pieces and said everything checked out good (BTW they hate Speedmaster).
https://promaxxperformance.com/product/maxx-170-ford-fe/

CNC version by Kieth Craft  https://promaxxperformance.com/product/shocker-200-ford-fe/

[MeanGene]

The Chinese can produce good stuff- if you pay them to. They build stuff to the price point they are paid for- which is usually "cheap". South Korea produces some VERY nice stuff if you pay them to- I have a Korean 6-speed transmission in my Indian, the castings are very nice, very quiet, absolutely no leaks, shifts excellent- just a nice piece

[mygasser]

Promaxx heads are pretty decent, they put quality valves in them and the machine work is nice or it least a set of SBC that we installed for a customer were,, our local machine shop was impressed with the off shore pieces and said everything checked out good (BTW they hate Speedmaster).
https://promaxxperformance.com/product/maxx-170-ford-fe/

CNC version by Kieth Craft  https://promaxxperformance.com/product/shocker-200-ford-fe/

i never knew promaxx did fe heads. i just had a look on their website and the maxx 170 head set up for hyd' roller cam would be most suited for my 390 build. cheaper than edelbrock rpm heads and with bigger valves and smaller chambers. thanks for the tip.
so has anyone got any experience with the promaxx fe heads?
thanks, neil.

[MeanGene]

I think it was Scott Foxwell that did some up and said he thought they were pretty good

[My427stang]

Promaxx heads are pretty decent, they put quality valves in them and the machine work is nice or it least a set of SBC that we installed for a customer were,, our local machine shop was impressed with the off shore pieces and said everything checked out good (BTW they hate Speedmaster).
https://promaxxperformance.com/product/maxx-170-ford-fe/

CNC version by Kieth Craft  https://promaxxperformance.com/product/shocker-200-ford-fe/

i never knew promaxx did fe heads. i just had a look on their website and the maxx 170 head set up for hyd' roller cam would be most suited for my 390 build. cheaper than edelbrock rpm heads and with bigger valves and smaller chambers. thanks for the tip.
so has anyone got any experience with the promaxx fe heads?
thanks, neil.

Be sure they clear your bore and valve reliefs.  Especially the exhaust side for the valves, not much room on a 390 bore, or even a 428

Sorry for being parochial, but I still can't support a Chinese casting regardless of it being finished at home just to save a buck.  I know it's a sign of the times, but 25.5 years in the military and seeing that emboldened theft in so many ways, they won't come through my shop, even if I lost a sale (or multiple).   

[allrightmike]

   I have a set of PROMAXX heads on my street 427 Starliner. I've had zero problems with them. Valve train geometry came in with minimal shimming. 72cc chamber with the smaller of their valve size options. Compared to the big "H" low riser heads with larger valves I would say I now have an extra 1,000 very strong RPM.