Pt. 2 Speed master magnum head review and run down

I decided just to start another thread for a short form review on them.
First off they advertise them is 179 cc's.
Ootb as cast..
They are 153 cc's intake.
Exh ports are 58cc.
The chambers advertised as 62cc.
The chambers are roughly 59cc

What does this mean...Besides why I've done so much for seemingly short of goal outcomes..though, when put in perspective are great outcomes given the patient. What did I get out of inspection and r&d...?
Well...with a 1.94 and two diff chamber unshrouding approaches ...that I can either get to 260'scfm and carry mediocre lower lifts like 178-180@.300 ....or saturate in the 250's and have great velocity/low lift like 67@.100,135@.200,193@.300,232@.400,254cfm@.500 Now for those curious..that's worked to 160cc, the exhaust are still only 60cc and the chambers are @66 after shaping them into something that works.
Granted that's all revolving around a 1.94 and not a 2.02 , I don't think there would be earth shattering gains. 10cfm+/-
I'm speaking with Jason at Speedmaster back and forth about this... he's interested in the numbers, actualities and so forth.. Im interested in some return of $ or credit, since I paid too much for a head that isn't ... I also have a set here for a member and we might reassess what if anything or returning them if they aren't fitting the build. Will toss up the exh numbers shortly.. still steam in them ...just more the last stop is all.
Consider this my update review wrap up for now.

Definitely did not start out as a performance head, but still a decent option for stock Magnum engines.
Thanks for posting all your results on these.

I should also add that the approach to their short turn is similar to the approach with the aluminum Speedmaster head... in that all you really have to do is just blend the valve job to the short turn , do the bowl shaping... leave the rest of the port alone. Once you get the 30,15 chamber angle set... hand blend it all to the chamber...to have a 240 something CFM mag head with stock int valve size and great low/mid. Most of the work is the top of the valve job and chamber. I would like to ask Jason who does his CNC work ..and if he might be interested in a template to basically make the Magnum heads salable ..by having a Chambers & bowls CNC'd 1st.
They cannot, repeat, cannot be used ootb without actually losing power. The lower lift flow ootb are ****.

Thanks for posting this invaluable information. Kim

So as if it were snailmail , descrbes the correspondence with Jason at speedmaster ...
Now it's in a managers hands... for a week now , the resolution to this issue to be seen. I'm waiting on them to change the description on their site as well as credit or a couple sets of valves.
I think it would be in their best interest to make right the wrong of false advertising 19cc larger than actual and at a premium price... because it's snake oil. I think if they don't, they'll lose all read about this and the mopar market in general. **** travels fast.

Heres a vid of basic chamber blend below the short side from a while back.
Everyone I know is youtubing videos nowadays. It's a pain the ***. Took 68 min to upload... why I haven't done much with videos.

These heads I milled .024 to all end up @60.5 - 61cc chambers. Int ports ended up @160cc ported.
Ootb using a plate...the as cast int port volume are 150cc's. Without the plate the water is allowed to bulge some=exaggerated reading.
I put these on as I planned a while back...with a cheap pos summit carb approved shortie headers ..and my truck hauls *** now. Massive improvement!! The part throttle is huge..as before it was having to down shift a lot more...but not now. It also feels like the cam actually comes on or like it has a cam in it now @ about 2800 rpm it lights off and goes to 5000 rpm no problem. Springs are set up at 130lbs seat 260lbs open 'stock cam lift .416 lift'. 300k and still has cross hatch in the cylinders... runs like a top now. It was a good move. That truck has a new rear end, new transmission and a better running/more power than new motor..

The stock heads= wasted guides, valves,
seats , seals, broke end studs...flowed like an ants prik...

FWIW the exhaust flowed great.
196cfm by .400 and peaked around 214cfm. Hardly did anything. The radius on the exhaust 'thanks to enough meat' just needed opening a hair and the usual roll over the ssr like a lip 'wave cresting' .

Awesome MOPAROFFICIAL. Kim