Re: [Amc-list] TBI fuel injection tuning...

[Frank Swygert <farna@xxxxxxx>]

Could be, but I really think it was because the cam and slow revs just meant that anything larger than the roughly 200 cfm 2V carb (factory WCD) simply wasn't necessary. The two YFs I had should have been roughly 250-300 cfm combined, but that's just a guess based on the throttle butterfly and venturi sizes. I think the one barrel YF is in the 125-150 cfm range. I know the WCD is about the same as the later BBD (BBD is 195 cfm). 

The intake in head design is actually good for efficiency. It keeps fuel vaporized better than a colder intake design, and vaporized fuel burns better, but it does lose a bit in power due to heating the mixture so much. Great for cold weather and quick warm-ups, not so good for hot weather. It's not the first Nash six to use an integrated intake, just the last! That's also why Ford did the same thing on their later model small sixes -- great for efficiency, poor for performance. 

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Date: Thu, 20 Nov 2008 21:29:04 +0000
From: Wrambler242@xxxxxxxxxxx
	
You know.
That would also explain why Frank did not see an improvement with his dual carb setup!
Nothing to improve on.
Got to wonder if the TBI will do much more than make it modern and convenient to drive?

Not trying to discourage you.
I want to see it done!
Just wondering out loud.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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