Reply to "aluminum heads"

> I believe the A3's are 235cc.

According to the Motorsport catalog, the A3's were nominally 241/134 cc's
intake/exhaust. B351's were 223/106 and C302's 212/95. Kelly's Brodix
BF300's were 196cc's.

> They are borderline too big for a 351.

Yes. They are smaller than 4V's but still larger than most 351C's need.

> Which reminds me, my Ford insider told me that the 351c was designed and
> tested as a 377.

The 1968 casting date aluminum Cleveland stuff was quite interesting.
4.1" bore, six bolts per cylinder, etc. Usually ran with a stroker
crank. Ford also had 325 cube 289/302's running around early on as
well as 4 bolt main aluminum block 377 cube 351W blocks (topped off
with Gurney Weslake heads). If only...

> I asked him why then do they call it a 335 series?
> He shrugged and said, "that's Ford for ya'".

Ford does a lot of that :-)

> The A3's are better (I wanna say perfect so badly) for a 377 c.

That brings up another point. There is such a thing as a port too small
relative to the cubes. Generally you shoot for a port velocity around
0.6 Mach. Some of the big cube strokers start pushing that number and
are better off with a larger ports.

> I think that my B3 heads were right at 217/218 cc's. I like the A3's
> a lot better.

Were these unported to unported comparisons? In my simulations, the
A3's and C302B's were pretty even.

Dan Jones