Not mine.
Nice looking set of heads for the cast iron factory type of guys.
- Thread starter pittsburghracer
- Start date
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OldmanRick
Well-Known Member
Might make some big torque on a stroked 318 sleeper.
Heads Look fancy- but what are the holes in the ports for? Looks like 1/4”
Ah! And I thought adding moth balls to the pump gas was where the power is.
There is a hump with holes on the 587 heads for a Air reactor pump passage
to port The hump appears to have been removed leaving just the hole. Also
the outside flange has been filled up.
The ports in NHRA Superstock MUST HOLD no more than stock CCs.
162 on the Intake if my memory serves. Those ports appear to be way larger
CC's than that = if picture is not deceptive which would at a minimum mean a year
vacation for NHRA racing at least. If blatant perhaps longer! Perhaps some extensive
welding or epoxy work could bring the down to NHRA specs but at the cost of some flow
probably.
All competitive small block Mopars that I am aware of (And that is about everybody)
run 700 to 800 or more lift NHRA superstock small block Mopars. i
Again, Maybe there is some other Superstock different than NHRA that they are built for.
They would probably be a fine bracket head.
It is not uncommon for us to spend upwards of $15,000 for competitive small mopar Super
Stock heads. I have often ported my bracket heads and Street/Strip heads but I am smart
to know my sketchy skin level.
Everyone feel free to flame me and make fun of my opinions again and tell me
what an idiot I am again for posting this opinion on line.
However, that is my honest two cents worth of opinion based on 60 years of Superstock Racing.
to port The hump appears to have been removed leaving just the hole. Also
the outside flange has been filled up.
The ports in NHRA Superstock MUST HOLD no more than stock CCs.
162 on the Intake if my memory serves. Those ports appear to be way larger
CC's than that = if picture is not deceptive which would at a minimum mean a year
vacation for NHRA racing at least. If blatant perhaps longer! Perhaps some extensive
welding or epoxy work could bring the down to NHRA specs but at the cost of some flow
probably.
All competitive small block Mopars that I am aware of (And that is about everybody)
run 700 to 800 or more lift NHRA superstock small block Mopars. i
Again, Maybe there is some other Superstock different than NHRA that they are built for.
They would probably be a fine bracket head.
It is not uncommon for us to spend upwards of $15,000 for competitive small mopar Super
Stock heads. I have often ported my bracket heads and Street/Strip heads but I am smart
to know my sketchy skin level.
Everyone feel free to flame me and make fun of my opinions again and tell me
what an idiot I am again for posting this opinion on line.
However, that is my honest two cents worth of opinion based on 60 years of Superstock Racing.
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Yet another observation.
In a head that is around stock runner CC's we
use a much flatter set of Valves. Think more Nail Head
of a design.
I cannot prove their value on a flow bench but
on the track they are significantly better performance.
In a head that is around stock runner CC's we
use a much flatter set of Valves. Think more Nail Head
of a design.
I cannot prove their value on a flow bench but
on the track they are significantly better performance.
John, you need to write a book. I'd buy it.
X2
perfacar
Well-Known Member
nail head valves vs tulip on track was worth .20 and 2 mph in a 340 stocker, on flow bench was 8 cfm per port better times 8 = 64 cfm total. just food for thought. john is right ports look very big,
PRH
Well-Known Member
Those were used to help anchor the epoxy that would have been there to shrink the port volume.
Someone has removed it, so the heads are likely too big to be SS legal as is.
If I did the first 70 years would be rated X.
After 70 years the remainder is PG!
That is pretty close to exactly what I observed back 30 years ago.
I just did not mention anything about it for many years!
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