Anyone ever run Speedmaster Heads on their small blocks
- Thread starter pittsburghracer
- Start date
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73smallblock
Well-Known Member
The 40% off sale is live again. ( Also posted in j par's thread)
dart_68
Well-Known Member
The heads on Speedmaster's website state that they are pushrod oiled, which is fine for a magnum motor but not an LA. Am I mistaken?
Yes. You can use the Comp Cams Pro Magnum rockers which use hollow ball & ball pushrods.
They oil thru the heads...they are LA heads.....believe me i got a few sets...The aluminum heads are LA heads...
They sell a cast iron head that is a copy of the magnum...got a set of them....
set coming out of box...you can see the pedestals for the shafts.. and a set bolted on to a 360 short block with crane/mp rockers...
MOPAROFFICIAL
Oogliboogli
Nope. Just free intake manifold
MOPAROFFICIAL
Oogliboogli
Probably won't see another sale like that ever again
rednesss
Well-Known Member
So, if I were to get these, would I have problems with compression ratio? I'm currently running cast iron J heads and am getting about 175 psi. It is my understanding that these are closed chamber, so wouldn't that be smaller than the old J heads?
Possibly. How much r ur heads milled now? Kim
I hope you got everything you needed then.
rednesss
Well-Known Member
Not 100%, but I think .008 and I'm running the Fel-Pro 1008 gasket which is supposed to give .039 compressed.
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j par
Well-hung Member
I'm .010 above deck and I'm gonna run Fel-Pro 8553's .053 thickness...
rednesss
Well-Known Member
Any guess as to what you're compression ratio is going to be?
j par
Well-hung Member
No..
It doesn't take money to cc the combustion chambers.
I know, you don't have time right now, do you. lol
rednesss
Well-Known Member
Is the CNC version worth the extra money?
There are so many of these Speedmaster posts going this has already been answered but I’ll do it again. Anyone with a die grinder can carve on a set of heads. The can turn out piss poor, ok, or excellent. A cnc program can be made from any of the above so you never know how good it is till you at least at a minimum see flow sheets from it. The numbers should be on par with a TrickFlow Head but I’m betting it’s not close to the numbers they put out and both are a 190 cc intake runner.
j par
Well-hung Member
How does that old saying go? Oh ya: you play the game u take ur chances. Kim
Does anyone know if the Promax heads are the same head?
Shocker 185 Mopar CNC (Sold in Pairs) - PROMAXX Performance Products
Shocker 185 Mopar CNC (Sold in Pairs) - PROMAXX Performance Products
MOPAROFFICIAL
Oogliboogli
Lol didn't need those... that's for sure.I hope you got everything you needed then.
Port volume is critical and build dependent.
"One size fits all" is bullshit.
That's my honest opinion.
MOPAROFFICIAL
Oogliboogli
Dam, they sure do look the same. Kim
In the bold.... huh? Say what? Mean what?
I would say no
Look at the difference in the combustion chamber.
Mopar Chrysler SB 318 360 170cc 65cc Hydr-R Complete Aluminum Cylinder Heads
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