RE: was 67 300 Re: 67 "Magnum" Head.. Re..516 heads

[Earl Helm <earlh@xxxxxxxxxxxxxx>]

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Joe is right, the small valve 915 heads came on the non-magnum 440
C body cars and Imperials in 67. I think everyone misses the real issue
with 915 - 516 heads. Yes they will produce a higher compression ratio
because of the chamber, but the chamber is the real advantage. A 906
head has some small inherent flow advantages, but the open chamber
is not a squelch area chamber. I am including a great link to the first
of three cylinder head articles. All three are a good read.

http://moparmusclemagazine.com/techarticles/5115/

Earl,


There were low performance 915's with the smaller 1.60 exhaust  valves.  And
I think if you open up the 516's to the larger exhaust you  have about the 
same head, although I don't know what they flow.   Joe



hello list

Seems that Joe and I post about some of the same subjects, beers and years
here, 
i will take any corrections as education.

A 76 4x4 Ramcharger we bought ran 15.9 in the quarter....

Yeah some idiots will race anything....

It was hot out and phoenix is about 1500 feet , so corrected for sea level
and 
the hot weather it was probably a  15.5-15.0 run..
 
Turned out it had a cast crank 440 with 915 heads....the fact the pig boat
ramcharger
weighs over 5000 pounds..we were pleased with the numbers.

we had a water pump fail on the run up to flagstaff last summer...got really
hot before we 
shut down...cracked the crap out of the heads....tore it down...heads
unusable...turned out
they were the small valve 915s....

picked up a set of 516s from ebay recently. They cost about $100 with
shipping. we had them cleaned
and checked for cracks.

we've compared them to our 915 heads, we have yet to discover a
difference...the ports and 
valves are indentical by our observations....both are closed
chamber...stuffing clay and
styrofoam into the ports to see where the 915s are larger have not showed a
difference.

I am always amazed that one can read and read everything there is to read
about mopar heads.

The bottom line is that there are people writing about this stuff and there
are people that 
have the cast iron pieces in their hands and looking at them. We think the
516s are probably
the most underrated of the mopar heads.

In fact it almost seems that the extra compression ratio of the closed
chamber almost makes up
for the smaller exhaust valve. I agree with Joe...put the big exhaust valve
in the 516s and you 
have the 915 head. 

I wait to have my ignorance corrected....

Also on the ignorance corrected field of play....

A 1968 fury 8 3/4 rear axle housing bolts into any e-body challenger or
barracuda..straight up...
perfect fit...we've done three.

The "official mopar chassis manual" numbers do not support this fact...same
kind of deal...fiction 
verus hardware.

And bend this as needed to fit our 62-65s...

rob in phoenix 

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Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
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bOyW3N.