Edelbrock Q-Jet Help

z70what

Bronco Guru

Joined

Oct 28, 2005

Messages

1,022

Loc.

Johnson City

• Mar 16, 2010

• #1

Are all Q-Jet carbs 750cfm? I'm just curious as i'm looking to run the Edelbrock Q-Jet on my 351W that i just finished rebuilding. I want to try it out before going w/ the full blown EFI setup. My 351W is just a basic rebuild that is bored .030 over and nothing too extreme. Can you get a lower cfm Q-jet or were they all this size? Just curious, thanks for your help.


Luke

 

Amac70

ME

Joined

Mar 27, 2002

Messages

3,269

• Mar 16, 2010

• #2

they are not all 750's my edelbrock q jet (1906 on tag) is an 850. The cfm on a qjet isn't like on a holly or similar. You can run bigger qjet because of the way they are configured. my qjet runs my motor just fine which is a basically stock 351 roller motor, edelbrock rpm intake, e7 heads, headers. nothing to special about it.

 

fungus

Bronco Guru

Joined

May 27, 2009

Messages

1,548

Loc.

Kaneohe Bay, Oahu

• Mar 16, 2010

• #3

Yep, no real need to worry about CFM rating when it comes to the Q-jet.

 

B

broncnaz

Bronco Guru

Joined

May 22, 2003

Messages

24,341

• Mar 17, 2010

• #4

As with any vacuum secondary carb its only going to open as far as the engine needs dictate. but qjunks are a little better than big holley or other carbs as the small primarys make driveability better. Other carbs have bigger primaries to attain the large cfms.