2bbl Intake... To Make or To Find?
"I did not know that"
same size port cross section size AND runner length?
Offenhauser improved a little on the port length difference. The factory intake though, gets a bad rap for port runner differences. Much moreso than it deserves. If you do some reading, you'll discover that the slant 6 has about the best fuel distribution of any inline 6 engine if its day.
That's one of the things that Chrysler was proud of and yet, it's one thing that most everyone says is bad, and incorrectly so. The intakes are deceiving in that the runners are not the lengths that they appear to be from the outside.
A quick inspection will reveal that they are a good bit closer to equal length than the outside of the manifold lets on, because the dividers inside of the manifold are not where the outside of the manifold make you think they are.
Offenhauser improved on this even more. They also left the runners as long as possible while making them "a little" more equal than the factory intakes. That's one reason I like the Offenhauser better, now that I'm more familiar with it and have had one a while. They have more runner volume, while the Clifford had more plenum volume.
I think for some reason, the big plenum theory is backwards on inline engines. Normally, on a V8 a large plenum positively affects low speed torque, while a smaller plenum positively affects high speed torque. This is the big reason older single plane intakes, like the Street Dominator, for instance, do not appear soft on the bottom end.
I think it's the opposite for inline engines, for some reason. It sure is on mine, at least. It's not soft on the bottom end one iota. With the 2.93 gear, you could "tell" it needed more gear "RIGHT" when you engaged the clutch, but changing to the 3.90 gear, I can tell beyond a shadow of a doubt, that if I had swapped to just a 3.21 that I would have gotten rid of every bit of that. It's simply no longer there "AT ALL". It pulls like a ***** in church now from off idle until 6200......that's as far as I've gone with it and it was still pulling. That's as far as I plan on going with it and that was actually an accident. I got carried away. lol That long 4.125" arm is really moving at that RPM. My intended redline was about 5500-5800.
Maybe "one day" I can build something more exotic that can be durable enough to really rev, but for now, I'm limited to stock style bottom ends.
All this of course, is just one idiot's opinion.
