'73 resto' project - TQ carb question

["Kerry Pinkerton" <pinkertonk@xxxxxxxxx>]

I agree that 650 is probably the right CFM flow for a big block.  I'm sure
that one of the theorists will jump in but I think I believe that the
smallest carb that gives you the top end CFM you need will provide the best
economy and drivability around town.  As I understand the theory, a bigger
car just isn't as efficient at low CFM demand.  Something to do with the
size of the bore and venturi effect.  Personally, I'd much rather have a car
that performed well at 750-2500 rpm than one that ran well at 2000-5000
since the former is where I spend most my time.

KerryP
Patch panels fabricated
Pinkertonk@xxxxxxxxx
dte.net/57imperial
Imperials -- 50 Limo, 57 roadster, 61's, 62, 68 Convert, 73, a 66 300 and a
bunch of lesser marques
----- Original Message -----
From: Rob P <fristpenny@xxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Tuesday, June 03, 2003 9:06 AM
Subject: Re: IML: '73 resto' project - TQ carb question


> I don't think TQs are known so much for cracking as warping so that they
get
> vacuum leaks.  I believe that as long as the "plastic" is good they have
no
> other special problems.
>
> As far as an 800 carb on a 318, remember the purpose of the spread bore is
> to allow a larger carb size without having big primaries that drown the
car
> around town.  I personally think 550 for a big block is pretty small. I
have
> a 625 on my 360 and it certainly isn't overcarbed, but for general
cruising
> I guess you can't go wrong.
>
> Rob
>
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