Ok with JUST the head porting, vs the prior Torq 405 and HP 433:
JDC Ported Heads:
Torq 423 at 4600 +18
Powr 475 at 6100 +42
I then had some fun.
Thinking of Ford's 44-page performance summary & plan from Aug 68 over on fordfe.com - I noted, in all that 44 pages, Ford's lack of EXHAUST PORTS is not even mentioned ONCE. Even today, the Rule of Thumb is, "heads will "support" a HP of twice their intake flow". I suppose a good exhaust/intake ratio is implicit, but all the emphasis is in intakes, as is obvious in the 44-pages of Ford stuff.
So I went in the Gonkulator, pretended to be JDC, and ported JUST the exhausts ,not the intakes:
Torq 411 at 4600 +6
Powr 460 at 6200 +27
OK, so you dont get the WHOLE gain, but much of it.
Then I turned back the clock and ported JUST the intakes, not the exhausts:
Torq 417 at 4500 +12
Powr 433 at 6000 +0
Porting the intakes ALONE did almost nothing compared to porting the Exhaust ALONE.
Of course porting both was better!
It doesnt matter so much today, because now we have SBF, FE, Cleveland, and Lima heads that actually have real exhaust ports.
But back then, a recognition that the exhaust has to get out would have changed a lot.
And now some FUN history. Detroit Dragway, the Dirty-D in the 3-1-3, is long gone.
Luckily I got to run there, only once IIRC, and only because Milan was closed so we drove all the way to Sibley at Dix.
From pg539 of the HAMB Junior Stock thread.
I guess 352's run ok after all.
352/250 of 64-65 was an underrated combo.
I have ONE trophy from DD that looks like the ones in the picture. At least i got to run at DD and roll around under the cars in the sharp gravel.
Why couldn't they have rounded the edges of the gravel, you know, for comfort?
