Quadrajet Carb Sizes

Ty Webb · 07-11-2007, 10:23 AM

I need some help determining the differences in carbs.
What is different in these carbs?
1375x2250/1093xAV
1375x2250/1218xAV

I know the first two numbers are the primary and secondary bore sizes. What about the last numbers? These (1218) seem to be used more on big block cars.

Thanks,
Ty

Danny Ashley · 07-11-2007, 03:44 PM

Those numbers are for the primary venturi sizes. The 1.093 is referred to as a 750 CFM and the 1.218 a 800 CFM. Depending on the application, both sizes were used by Chevy, Buick, Olds, and Pontiac. Danny @ Q-Jet Performance.

Ty Webb · 07-11-2007, 04:11 PM

Danny,

Thanks for the reply and information. That's what I was thinking, but me and thinking seem to have issues.

Appreciate it!
Ty

07-11-2007, 10:23 AM	#1
Ty Webb Junior Member Join Date: Sep 2003 Location: WV Posts: 41 Likes: 0 Liked 1 Time in 1 Post	Quadrajet Carb Sizes I need some help determining the differences in carbs. What is different in these carbs? 1375x2250/1093xAV 1375x2250/1218xAV I know the first two numbers are the primary and secondary bore sizes. What about the last numbers? These (1218) seem to be used more on big block cars. Thanks, Ty

07-11-2007, 03:44 PM	#2
Danny Ashley Member Join Date: Nov 2001 Location: Marion,In. Posts: 257 Likes: 41 Liked 91 Times in 23 Posts	Re: Quadrajet Carb Sizes Those numbers are for the primary venturi sizes. The 1.093 is referred to as a 750 CFM and the 1.218 a 800 CFM. Depending on the application, both sizes were used by Chevy, Buick, Olds, and Pontiac. Danny @ Q-Jet Performance.

07-11-2007, 04:11 PM	#3
Ty Webb Junior Member Join Date: Sep 2003 Location: WV Posts: 41 Likes: 0 Liked 1 Time in 1 Post	Re: Quadrajet Carb Sizes Danny, Thanks for the reply and information. That's what I was thinking, but me and thinking seem to have issues. Appreciate it! Ty