650-cfm carb on a 408/427?

[Xtreme Limits]

how much Hp will a 650cfm carb suport a 408/427 engine?

how much hp will i gain by upgradeing to a 850?

215cc protopline heads
f303 or tfs stage 3 cAm
super victor intake
408/427 botom end
Looking to make 500-550+hp N/A
an 700+hp when on nos'
will a 650 work for what i need

 

[86bluecobra]

a 650 is 2 small in my opinion. That 351w is now running Big Block cubes and needs to be fed accordingly. You will need atleasty a 750 to get that.

 

[Tonys96Cobra]

Assuming a 6500 rpm shift point and 100% VE, you would need an 800 cfm carb for your 427. If you reve higher or have more than 100% VE, youll need bigger. Your 650 will carry you 427 to about 5000 rpm.