427 Side Oiler Carburator

[BAsque1]

Originally Posted by mrmustang

Lou,

Depending on your specs, a 600-650cfm double pumper, 4 corner idle circuit carburetor is recommended.....For when it comes to fuel consumption, bigger is not always better. Chassis (not engine) dyno does not lie


Perhaps post some specs on your engine and we can go from there.


Bill S

Bill, unfortunately I don't have the specs other than it is a 427 Side Oiler, I know it has a 770 Holley Street avenger, and that is what I purchased to replace the old one, the rebuilding was quoted at about $300.00 the new one is $367.00 so that was a no brainer.

The present carb is too rich and I have not been able to adjust it to a leaner mixture--no effect when we turn the screws. the bowls were checked and that is fine, but I am still getting a very rich mixture.

My gas mileage went down from 11-12 to about 8 MPG, not that this will break me but, it tells me that there is something wrong. I removed the electric gas pump and left the OEM mechanical so I get between 5- 5.5 lbs as it should vs 9 lb that I was getting before.

I use very good gas BP 93 octane or Shell 93. I used a bottle of Techron a while back without much change, the in line gas filter is new and now I installed a new Fram filter when I removed the electric gas pump.

Before it gets to normal temp (180 F ) the mixture seems very rich. The manual choke is working fine and the secondaries are also working fine. Long story short I decided that I would change it.
Regards
Lou