350 Chevy carb size?

[Ken Tripp]

What is the best carb size for a 350 chevy?

[jim]

Hi

Under what conditions?

Jim

Ken Tripp wrote in message ...

[Gary Derian]

What is the best length for your legs? Just long enough to touch the
ground.

The best size carb is the one that fits the engine's needs.
--
Gary Derian <gde...@cybergate.net>

[pcme...@boi.hp.com]

Ken Tripp (ktr...@triax.com) wrote:
: What is the best carb size for a 350 chevy?

For a 350 that can turn 6000 rpm and has about 85% VE
a 600 or 650 CFM if your thinking of a Carter or Holly.
The Rochester QJet is rated at 750 but because it is an
air valve design it will fit a wide range of engine sizes.

paul

--
Return address: pcme...@hpbs4922.boi.hp.com
The views expressed are the exclusive views of Paul C. Menten
and do not reflect the views of the provider of network access.

[mike engelke]

I currently use a Holley 650 w/ vacuum secondaries. I've had very good
luck with it. The vacuum secondary throttle plates can be adjusted by
using different spring tensions. You can custom taylor the carb to the
needs of your engine.

[Chris, Danni, and Michael]

On Thu, 3 Dec 1998 23:08:00 -0800, "Ken Tripp" <ktr...@triax.com>
wrote:

>What is the best carb size for a 350 chevy?
>
>

GENERALLY a 650, but there are a million variables. 390 for some and
900 for others.

[K Mann]

Better get the 1150 cfm Dominator to be on the safe side : ).

Typically for a standard 350 sb, 600 to 750 is good. But not the Holley
750 double pumper. A standard 750cfm. Make sure you have a good intake
though.

K Mann

Chris, Danni, and Michael <miken...@wpmedia.com> wrote in article
<366a10d1....@news.wpmedia.com>...

[Mcguireb]

There is a simple formula you can use to determine the best carb to use. It
goes like this:

cubic inches X the REAL max rpm you expect to use, divided by 3456 = carb flow
rating in CFM (cubic feet per minute, the Holley flow rating you see thrown
around all the time)

example: 350 cubic inches X 7000 rpm, divided by 3456, = approx. 700 cfm

....but I bet you will seldom take your engine to 7000, esp. if you run an
automatic on the street... probably more like 5000, where, if you do the math,
it turns out 500 cfm is enough. So it is easy to see: most engines are waaay
over-carbureted. If you want a crisp running engine with REAL street
performance, keep it conservative.

In most street situations, the Quadrajet is really the way to go...especially
if cold starting/driveability and fuel economy are real issues for you. The
Holley street models are nice too, but more pricey, and will take some work to
get exactly right. Have fun, good luck.

regards,
McGuire

[kba...@tampabay.rr.com]

On average,about 600cfm works pretty good for most but it depends on a
lot of variables.If your looking for pretty good performance without
affecting and or possibly improving milage,the holley enconomizer seems
to work pretty respectable.It is a direct drop-in replacement for the
quadrajet but the holley specs claim it to be a 450CFM.it requires no
modifications to linkage or fuel lines and bolts to the stock
manifold.It also has a mechanical secondary.I used one on a slightly
warmed over 350 that don't see a lot of high rpm and it had a lot more
responsiveness than the 600.On the highway,my mileage went up from 15mpg
to 22,around town was not as impressive,from 10 to 12mpg.It is a little
pricey and the edelbrocks may be comparable but I don't have any
experience with them.Just my 2 cents worth.

[Ken Tripp]

The application is for a 74 Chevy Suburban with four wheel drive. Currently
I have a Quadrajet on it, but was wondering if it was over carburated.

Ken Tripp wrote in message ...

[Hugh Ahart]

Buy an Edelbrock 600, it will run great with little or no tuning or worries.
I also had a Holley 650 and it was a nightmare, always had to tune it, it
kept blowing power valves, etc. A holley is more of a racing carburetor
meant to be tuned all the time. I just bought a brand new edelbrock and it
is the best investment I ever made.