Author Topic: speedmaster aluminum heads and roller rockers  (Read 2685 times)

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RustyCrankshaft

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Re: speedmaster aluminum heads and roller rockers
« Reply #15 on: April 20, 2026, 08:37:43 PM »
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.
« Last Edit: April 20, 2026, 08:40:55 PM by RustyCrankshaft »

e philpott

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Re: speedmaster aluminum heads and roller rockers
« Reply #16 on: April 21, 2026, 07:44:57 AM »
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/

« Last Edit: April 21, 2026, 07:48:34 AM by e philpott »

MeanGene

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Re: speedmaster aluminum heads and roller rockers
« Reply #17 on: April 21, 2026, 09:25:02 AM »
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

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Re: speedmaster aluminum heads and roller rockers
« Reply #18 on: April 21, 2026, 11:31:11 AM »
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.
ford anglia wagon altered wheelbase gasser

MeanGene

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Re: speedmaster aluminum heads and roller rockers
« Reply #19 on: April 21, 2026, 11:52:33 AM »
I think it was Scott Foxwell that did some up and said he thought they were pretty good

My427stang

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Re: speedmaster aluminum heads and roller rockers
« Reply #20 on: April 21, 2026, 12:35:55 PM »
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).   
---------------------------------
Ross
Bullock's Power Service, LLC
- 70 Fastback Mustang, 489 cid FE, Victor, SEFI, Erson SFT cam, TKO-600 5 speed, 4.11 9 inch.
- 71 F100 shortbed 4x4, 461 cid FE, headers, Victor Pro-flo EFI, Comp Custom HFT cam, 3.50 9 inch

allrightmike

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Re: speedmaster aluminum heads and roller rockers
« Reply #21 on: April 21, 2026, 12:51:02 PM »
   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.

mygasser

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Re: speedmaster aluminum heads and roller rockers
« Reply #22 on: April 21, 2026, 07:19:13 PM »
thanks again for your help guys, unless s/hand edelbrock's turn up it seems 'for me' promaxx heads will do the job. i will spec the smaller valves too.
neil.
ford anglia wagon altered wheelbase gasser

frnkeore

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Re: speedmaster aluminum heads and roller rockers
« Reply #23 on: April 22, 2026, 01:27:44 AM »
Quote
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).   

I assume that also goes for Molnar rods?
Frank

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blykins

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Re: speedmaster aluminum heads and roller rockers
« Reply #24 on: April 22, 2026, 03:54:29 AM »
thanks again for your help guys, unless s/hand edelbrock's turn up it seems 'for me' promaxx heads will do the job. i will spec the smaller valves too.
neil.

If you’re going to buy new heads, buy Trick Flow.  Get your moneys worth. 
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
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mygasser

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Re: speedmaster aluminum heads and roller rockers
« Reply #25 on: April 22, 2026, 05:46:05 AM »
thanks again for your help guys, unless s/hand edelbrock's turn up it seems 'for me' promaxx heads will do the job. i will spec the smaller valves too.
neil.

If you’re going to buy new heads, buy Trick Flow.  Get your moneys worth.
agreed, but they seem to be approx' $1000 more (50%) than the promaxx heads. i'm not building a track car, it's just a fun driver so although the best would be great if i can't afford the best..... i often say to people it doesn't matter how much of a bargain something is, if you don't have the money it's still unfortunately too expensive.
neil.
ford anglia wagon altered wheelbase gasser

blykins

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Re: speedmaster aluminum heads and roller rockers
« Reply #26 on: April 22, 2026, 07:47:33 AM »
thanks again for your help guys, unless s/hand edelbrock's turn up it seems 'for me' promaxx heads will do the job. i will spec the smaller valves too.
neil.

If you’re going to buy new heads, buy Trick Flow.  Get your moneys worth.
agreed, but they seem to be approx' $1000 more (50%) than the promaxx heads. i'm not building a track car, it's just a fun driver so although the best would be great if i can't afford the best..... i often say to people it doesn't matter how much of a bargain something is, if you don't have the money it's still unfortunately too expensive.
neil.

For the base model ProMaxx head, you get not much more than Edelbrock performance.  You pay a lot to not get much. 
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
Instagram:  brentlykinsmotorsports
YouTube:  Lykins Motorsports

My427stang

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Re: speedmaster aluminum heads and roller rockers
« Reply #27 on: April 22, 2026, 03:22:54 PM »
Quote
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).   

I assume that also goes for Molnar rods?

Sorry Frank, I floated right by your post. It's a solid poke.

It is extremely unfortunate, and yes, looks to be speaking out of both sides of my mouth.  Add SCAT, Eagle and K1 to that mix too, and there are many more.  I hate it, I do try to avoid it when there is a US-made substitute as in this case. Not to mention, using Molnar stuff it isn't to save money either, so yet again another difference, if we had a US made alternative, I'd jump. In fact, my most recent build for myself (452 in the Cobra) runs Crower rods.

We are all forced to use some things with manufacturing in China.  My only counter is that I draw the line at known stolen designs.  That is the absolute main reason that I would kick those heads out of the shop, same with the intakes.  It doesn't make it much better, but at least the R&D costs are paid for by the manufacturer who then profits here.  The Stevens heads and whoever is making the intakes, as well as all the  Speedmaster stuff, and all the names it changed from, stole all kinds of stuff from MSD, from Parker, from Edelbrock, you name it without legal right to it.  It'd be criminal if done in the US between two US companies. 

Keep in mind the manufacturer sent a set to me and I think to Brent too, I had my chance for input.  Not interested then and not now.  Just think if Jay's intake adapter shows up for 150 bucks?  Should we buy them? Certainly not an unlikely scenario, easy when it's a company, how about if it's a friend like Jay?.

BTW I wouldn't be mean to anyone about choices they make to pay their bills, I just wouldn't do an engine if someone asked to do that top end, and man I hope some of my best customers don't ever ask :)

However, eventually it will fix itself, cost to entry will be too high in the US due to lower volume and nobody will do the R&D on anything that isn't high volume production, cool US made parts will stop and China won't create them on their own. 



« Last Edit: April 22, 2026, 04:12:43 PM by My427stang »
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Ross
Bullock's Power Service, LLC
- 70 Fastback Mustang, 489 cid FE, Victor, SEFI, Erson SFT cam, TKO-600 5 speed, 4.11 9 inch.
- 71 F100 shortbed 4x4, 461 cid FE, headers, Victor Pro-flo EFI, Comp Custom HFT cam, 3.50 9 inch

blykins

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Re: speedmaster aluminum heads and roller rockers
« Reply #28 on: April 22, 2026, 04:13:51 PM »
I'll throw my couple of pennies in here....

Molnar is a step *up* in price and quality, not like buying a SpeedMaster product.  Molnar is superior to Scat, Eagle, etc., and you pay for it.  You're not setting out to buy it because it's half the price of others, like SpeedMaster.

In addition, in reference to speaking out of both sides of one's mouth, I'll note that Frank likes to poke engine builders about using Molnar rods under the guise of being foreign-country-conscious, but on other forums will be quick to talk about how great certain South Korean products are.
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
Instagram:  brentlykinsmotorsports
YouTube:  Lykins Motorsports

frnkeore

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Re: speedmaster aluminum heads and roller rockers
« Reply #29 on: April 23, 2026, 01:46:25 AM »
BTW, besides Crower still making rods, Carillo and Oliver still make rods. What company hasn't copied the H beam Carrilo rods?

If you want to keep American rod manufactures in business , those are the rods that should be in quality builds.

So Brent, Before you speak for me, I would suggest that you reference the actual the thread you speak of or, give a direct quote from it! That is NOT what I said, at all. As a matter of FACT, I did not say anything about how great ANYTHING was!

Prove me wrong or apologize.
Frank

'60 Ford Starliner
'61 Fairlane 500
Austin Healey Replica with 427 & 8.5 Cert