I had a BBC in a 1985 Impala and used headers off of a 1970 SS 454 Chevelle and they fit perfectly. I had to notch a bit off of the upper A-arm frame mount with a gas powered plasma cutter.
my 582 back from dyno pull:
I pulled the 850 and single plane high rise for a dual plane Edelbrock 4500 base intake manifold and a 1050 Dominator:
All fit under my flat hood and looked like a used Taxi.
I do not understand why they are selling you a pressure regulator with a mechanical fuel pump for two reasons. First is a mechanical fuel pump is located under a meter from the carb inlet, and the pump out let. A pressure regulator is used with an electric fuel pump attached back at the sump in the back of your gas tank because fluid friction requires that we crank up the pressure to move the fluid to the front of the car against acceleration forces. The pressure regulator allows you to cut back on the pressure right at the carb inlet.
The second and even stranger association of a mechanical pump and a pressure regulator is the fact that the pressure in a mechanical pump is controlled by the spring that forces the gas out of the chamber it is temporarily held to be heated up. The pump sucks gas in from the tank on the up stroke (cam eccentric pressing down) at less than atmospheric pressure and is forced out by five to seven coil springs around the top of the diaphragm. Those springs are usually set for the maximum pressure of seven psi that a Holley will accept from the aftermarket and five psi for a stock pump with a stock carb.
The idea of overpowering the carb with pressure that requires a pressure regulator makes no sense other than greed.
Big Dave
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Impalas.net
93.6K posts
14.3K members
Since 2005
A forum community dedicated to Chevrolet Impala owners and enthusiasts. Come join the discussion about engine swaps, performance, modifications, classifieds, troubleshooting, maintenance, and more!