Carb Id? 7040240

Does anyone know what a 7040240 carb is from and what cfm it is? I was told that some q-jets will flow as much as 980 cfm...is this correct and what needs to be done to it? Thanks.

 

It's from a 70 Buick 455 auto trans 49 state emissions car. Stock, it used 750 CFM of air.

 

7040240 is a '70 455 carb. with AT, 750 cfm.

 

Any idea if it would work well on a cammed stage 1 engine, or should I find a better one?

 

I run a 7040240 on my GS. Runs 12.20 on a good day. Car is using the KB 107 cam. Picture in my avatar is with that carb.

 

Hi,carb is 1970 GS 455 750 cfm.If you go with 71 to 74 they will have 800 cfm and it will get you in the 12.00.BrunoD.

 

Thanks for the replies, guys. Is it true some q-jets can flow 900+cfm? I really want low 11's, high 10's with this car...3.23 posi rear, MT headers, mild ported stage 1 iron heads, sp1 intake, havent decided on converter yet, but want a 550 lift cam(currently sp2x). Or should I consider a holley? I'm not too concerned with idle characteristics as a good 3000 stall should eliminate that. Any suggestions would be appreciated. Thanks again

 

Factory Q-jets were either 750 or 800 cfm. The aftermarket Edelbrock Q-jets were 850.
Your goals are acheivable with that carb, but it would probably be easier with a Holley-type carb.