Why use a 500 cfm as apossed to a 600 or 650 cfm in a 289? Any recmmendations on a brand ...the only 4 barrel I came across was an Edelbrock. Thanks

 

mainly because it is to much fuel for the amount the engine can burn at once. If you put a higher cfm carb in, like say a 700, in a little 289, that 289 will not be able to consume the fuel fast enough to keep up, and thus resulting in unburned fuel yada yada ya

 

hey yea that's righto bigr carb is 2 much unless u r into the nitrox now that's a diffrnt story!!

 

GT289 is right. The bigger the carb (on a 289/302), the more sluggish it's going to perform. You need to wear the right size shoes for your feet, if you want to run your fastest!

 

If you get a carb thats to big then your engine is goin to flood (get too much fuel into the cylinders) the engine can only burn a certain amount of fuel and when you start getting too much fuel you start fowling sparkplugs and our car will start spittin black smoke out of the exhaust.

 

I approve these above comments!

Gun

 

yes that is true. i just got me a edelbrock 500 cfm and it works great. especialy with the air gap intake manifold.

 

THANKS FOR THE INFO. SEEMS YOU ALL AGREE. I'M GOING TO GO WITH A PERFORMER RPM INTAKE AND AN 500 CFM EDELBROCK. THANKS AGAIN

 

I’m running a 600 cfm on a performer intake but I have a 302 with a street cam.

If you’re running stock cam 289 then the 500 should be just right.

Gun