Procharger vs Pounds of Fuel per pony...

[Lenny]

When you carb a Procharger, and lets say you gain 200 HP, do you size your carb based on the pounds/fuel per horsepower or do you leave almost as the normally aspirated stock configuration and rely only on the cool air and pressurization to take care of itself.

I do not need another Lean motor...

;)

[DonCig]

Lenny, your answer is buried in the procharger website, specifically 608cfm for a 350 spinning up to 6000 rpm.
Here is a link to the buried .pdf file that will answer all of your questions.
I do not like the design of their new website.

http://www.procharger.com/pdf/Chevy.Prod.bb.pdf

Don

[LKSD]

Lenny, your answer is buried in the procharger website, specifically 608cfm for a 350 spinning up to 6000 rpm.
Here is a link to the buried .pdf file that will answer all of your questions.
I do not like the design of their new website.
http://www.procharger.com/pdf/Chevy.Prod.bb.pdf
Don
:yes::yes: :) Jamie


.

[BUIZILLA]

Lenny, this project is not for you.... nice wet dream, but....

[LKSD]

Here is the excerpt:

Carburetor Selection and Preparation
When selecting a carburetor for your blow-through application, as with naturally
aspirated engines, less is generally more. A carburetor can be sized according to
your engine’s airflow and resultant power output. To determine what carburetor
size best meets your needs, please refer to the chart at the right. Even though
a larger than recommended carburetor may offer some increase in peak
power, it will likely cause the engine to be less responsive at low RPM and
result in drivability unacceptable for cars that will be street driven. Preparing
a carburetor for use in a blow-through application typically involves few, if
any modifications. Among those needing no modification are Holley’s HP
series carburetors which are designed with no choke assembly and generally
equipped with Nitrophyl floats from the factory. For standard “double pumper” carburetors,
the choke assembly should be removed to provide optimal airflow and performance when used with
a carburetor bonnet. Additionally,
the brass floats (which will
collapse under boost) must be
replaced with Nitrophyl floats
(available from ATI, or Holley).
With only the modifications listed
above, Holley “double pumpers”
(when properly jetted) will
typically flow enough fuel to
support roughly 1 hp per rated cfm
of airflow. Used in pairs and
equipped with the standard
modifications plus the installation
of secondary metering blocks, a
pair of Holley 450 cfm “tunnel ram”
carburetors can be tuned to
support in excess of 1200 hp.
Single carburetor applications
exceeding 1 hp per rated cfm may require additional modifications such as resizing main wells and power valve restrictions,
changing boosters and emulsion circuit recalibration. If you would prefer not to make these modifications yourself, they can be
performed by an experienced carburetor shop. Please contact ATI’s Technical Service Department for the phone number of a
qualified carburetor builder. Knowing the fuel flow, the appropriate fuel pump size may be determined as well. Refer to the axis at the
right of the chart on the opposite page to determine the minimum pump flow rating (in gallons per hour). Keep in mind that the pump
you use must be able to support this flow rate at your peak operating pressure (base fuel pressure + max boost pressure) as the fuel
pressure must remain at a fixed amount above manifold pressure for proper operation.



:) Jamie / Lakeside

[Lenny]

Lenny, this project is not for you.... nice wet dream, but....

...maybe, but it wasn't a dream Jim :D