I have a 351w and i am looking what carb would be the best for power. I have a 670cfm but i think it is to small. I was looking at the 850cfm.

 

For a stock 351w a 670 is ok. An 850 would be OVER KILL!

 

the motor has AFR heads and 11 to 1 comp.

 

Holley HP 750 is what i use.

http://store.summitracing.com/partde...p;autoview=sku

 

As FASTBLACK said, I would use a 750. I still think an 850 is WAY over kill for an 11:1 AFR headed 351w. I have a 850DP for my 408w 11:1.

 

thanks

 

Even FAST probably would agree with this. Call or go online to Pro Systems. They will need your specs of your engine, intake, cam specs, heads etc. any info you can give them they can use. they will custom build a carb for your engine. they are the best. unless you are very experienced or patient with experimenting call them their carbs are plug and play. i have two and they are bad.

 

You are correct. Prosystems is a good company that a lot of people use. I had to do some tweaking to my hp to get it right but it runs awesome. For out of the box performance pro will be your best bet. And their around the same price as mine.

 

Pro Systems. Call them and have them build ya one that is specific for your set up.