quote:Originally posted by Panterror:quote:Originally posted by PanteraDoug: Since this was a study likely for possible production, I would bet it is a dual plane.
There's no need to speculate about the 2x4 intake configuration. It is known to be and identified in the article as the open plenum dual four Ford prototype with a pair of 710 Holleys. In the pictures you can see they are vacuum secondary carbs. The article said low speed operation was very poor, and the engine didn't "start to work" until 5krpm, and was all done by 6600rpm. 346 ft-lbs @ 5krpm and 398 HP @ 6600. The cam specs were vague but characterized as a "solid over 300 degrees duration with 520 lift". -Not much pop by today's standards. I can post the entire article if you want to see cam specs but I think the entire article is archived somewhere at the 335 Series Forum.
Best,
K
Even so it would be nice to see the unit in person and run now. It may be similar to the HM B9 2/4 and/or the 427 Tunnel Wedge.
I wouldn't characterize either as a "street manifold" and I have seen them both run on the street.
I have the 180 2/4 on my 67 GT500/427 with the 715 427 matching carbs. I suppose it produces more torque down low then the Tunnel wedge does, maybe a lot more, but generally speaking it doesn't get used to run to the grocery store any more nor in tractor pulls so really, as you suggested, performance is all relative.
Plus even if the Tunnel Wedge is a dog until 3500, it doesn't matter. It still makes retched excess...even as a dog. The top end, that's another matter, and yes the rpm of the top end is relative too.
I don't have the article of the test. I do recall reading it sometime last year. I would point out that the terms of disappointment the author is using or even if he is repeating Millers remarks are relative, and somewhat judgmental as well.
I doubt the project died because of disappointment in the manifold. Emissions and the first fuel crunch is what killed that.
All purely academic now I'm afraid. Still, I'd suffer with the manifold...even though it's a "disappointment".
Thanks for posting that information. All is good.