Hot Rod Forum : Hotrodders Bulletin Board

Hot Rod Forum : Hotrodders Bulletin Board (
-   Engine (
-   -   Holley or Edelbrock? Is 600 CFM enough (

Jag Daddy 05-04-2004 12:46 AM

Holley or Edelbrock? Is 600 CFM enough
I'm looking at replacing my old tired Qjet sometime in the future. Would you go with a Holley or Edlebrock for a 400 SBC?

Also is 600 CFM enough or should I go bigger?


Croz 05-04-2004 01:35 AM

depends on how high you want to rev the engine. If you want to rev it to 5500 I would go with a 650.

DoubleVision 05-04-2004 02:03 AM

I`d stick with a Q-jet.

jimfulco 05-04-2004 03:53 AM

Me too.

87442lover 05-04-2004 03:56 AM

Stick with a Q-jet, they can normally flow up to 750CFM,

600CFM would be strangling the poor 400, you should have a carburator rated at 750 or more for the 400.

stepside454 05-04-2004 06:29 AM

Id stay with a Qjet, but if I decided to buy aftermarket, it would depend. if its a stock 400, than youll never see 5000 RPMs, a 600 cfm would be perfect, I prefer Holley personally. I wouldnt put a 750 on it unless I plan to run it to 6000RPMs.

juveteach 05-04-2004 07:18 AM

Stick with the Q jet. SMI Sean Murphy Induction) does a nice re -build on them. For a Q jet he is competitively priced.

Jag Daddy 05-04-2004 08:36 AM

Isn't the Edelbrock a Qjet copy? One of the man reasons I'm asking is a friend of mine has a Holley 600 CFM sitting in his garage for 20.00. I was thinking after a rebuild it would still be cheaper than the new Edelbrock. I might just get it for a spare anyway.

How hard is it to interchange Holley with a Qjet anyway? Cabling etc.


Sudden Psycho 31 05-04-2004 09:00 AM

to exchange the two, you will need an intake adapter, and sometype of linkage setup and braketry to make it all line up...
throttle , kickdown , etc

stepside454 05-04-2004 04:37 PM

Edelbrock does offer a Qjet, but when you said 600 cfm & Edelbrock I assume you mean the square flange edelbrock, Edelbrocks version of the AFB.

Jag Daddy 05-04-2004 06:18 PM


Edelbrock does offer a Qjet, but when you said 600 cfm & Edelbrock I assume you mean the square flange edelbrock, Edelbrocks version of the AFB.
Sorry at first I was referring to the regular Edelbrocks. Well the Holley I was referring to came off a SBC so how hard would it be to get it to work.

20.00 for the Holley I couldn't pass it up, it even had an electric choke. I guess I could rebuild it and sell it. The Qjet I have needs a new choke and a I'm sure a rebuild wouldn't hurt. I looked at the electric choke kit for it and it wasn't cheap. Oh well back to the drawing board.


tresi 05-04-2004 07:22 PM

I seen a pontiac ventura with a 455 run a 10.83 with a 600 vac sec carb that had no other work other than a jet change. So you reall don't have to worry about the carb being too small. You could slap an adaptor on and a throttle bracket and it would go down the road. Be aware that that type of adaptor doesn't make a real smooth transition to the manifold. What ever carb you use get the manifold that fits it.

Jag Daddy 05-05-2004 12:29 AM

Found this cool info link, maybe it will help someone else too
Holley Carb Info


All times are GMT -6. The time now is 05:22 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.