Re: [Classic Mustang] Re: Two questions, carb, and paint removal

How many RPMs are you planning on turning with that puppy? At 5,500
RPM, you are only going to pull 552 CFM [(347cu.in./2)/1728 * 5,500 RPM
= 552.228 flow in CFM]. Unless you are taking this on the strip and
intend to blueprint and balance it, I wouldn't even think about going
beyond that for a red line.

A 600 CFM is more than enough carburetor. Most people make the mistake
of over doing it... and then they wonder why it won't run right through
all ranges in the street, or fails to idle well, or sucks gas like
there's no tomorrow. A simple Holley LIST-1850 600 CFM w/ vacuum
secondaries is more than enough - and my personal experience is that it
will likely work better right out of the box without any additional
tuning (than the 4100 or 4300).

That's my thots...
-Michael

Dennis Ouellette wrote:
> The 4100 is a different carburetor than the 4300 which was available
> on 68 and later Fords. The 4100 is actually supposed to be a better
> carb than the 4300. But both of them only flow about 480-500 CFM.
> For a 347 stroker, I agree with the others that you should go with a
> 600-650 CFM carb. I prefer mechanical secondaries but vacuum are OK
> too. I'm not sure of shop manual sources as I'm focused on the 68 I
> have. Mixed review on having the carb rebuilt by pony carbs. Some
> have had good success...others not. I would suggest going to your
> local speed shop and asking them what would work on your 347 and
> consider getting both intake and carb that would match your
> application better than a 4000 series Autolite carb. FWIW....
>
> Dennis
> 68 J Code Fastback - Tahoe Turquoise
>
>
>

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