850 holley

 

Went from a Holley 750 cfm to a 650 cfm. More low end power. With all my mods could never go with a 2 bbl carb. The only way I would go with a 2 bbl is if it was a factory original car.

 

4bbl 570cfm. 2bbls can make plenty of power, they have large 2v carbs for 2v race classes, but the mileage in a street car would suck with a large 2v carb. I still don't understand why people think they need a larger carb to make more power.

 

my car had a very worn but once hot 289 with a 780DP holley on it. Needless to say it was drowning.

now the mild 302 has a 600 vac sec Holley, which works ok, but has a slight hesitation on initial acceleration. one day i will get round to dynoing it to make sure jets and power valves etc are all suited to that engine.

 

car is a C code, ditched the stock 2v carb and intake for edelbrock performer RPM airgap intake and a 650 holley.

 

600cfm holley 4blon stock intake for now...edelbrck rpm topend kit with air gap intakesoon!!

 

Replace the stock 4bbl with Holley 650 and EDL Endurashine Performer.

 

70mm Accufab throttle body, Pro-M MAF, Explorer non-EGR intake and 24# injectors for me.

 

I plan on using the Autolite 4100 I got off eBay and rebuilt.

 

Eddy 4 bbl here!