Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: lsp on June 20, 2014, 07:48:50 AM

Title: Float Bowl Volume
Post by: lsp on June 20, 2014, 07:48:50 AM

Looking for the ability to increase the float bowl volume in my Q-Jet. As the engine goes up through the rpm range on the dyno, it seems like the bowl runs empty and recovers. The engine stumbles slightly every 600 rpm or so going from 6000-7800 rpm.


Thanks 

Title: Re: Float Bowl Volume
Post by: lsp on June 20, 2014, 08:57:22 AM

What is the largest needle and seat available? Might be an easier fix?

Thanks

Title: Re: Float Bowl Volume
Post by: 429bbf on June 22, 2014, 08:31:31 PM

the biggest I've seen is a .145. how big is yours? you can drill yourself and reseat it . fwiw

Title: Re: Float Bowl Volume
Post by: Cliff Ruggles on June 30, 2014, 05:35:35 AM

Bowl volume is NOT the issue

The fuel is simply leaving the carb faster than it's coming in.  With only one needle/seat assembly to feed the engine fuel delivery with the q-jet needs to be up to par for the power level.

The carb could also have too small of a needle/seat assembly as mentioned, which is the first place to look when having fuel delivery issues.....Cliff