Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: mcx on March 06, 2019, 12:22:56 PM

Title: Oldsmobile 70-74
Post by: mcx on March 06, 2019, 12:22:56 PM

Hello Cliff...I was curious why Oldsmobile would drill the primary throttle blades when it already has a idle air bypass circuit?...everyone i see on EBay has those holes drilled added to the blades.

Title: Re: Oldsmobile 70-74
Post by: Cliff Ruggles on March 07, 2019, 03:29:37 AM

Not sure why.  Some Pontiac Ram Air carbs also have drilled throttle plates.

I prefer to add idle bypass air with the bypass system vs drilling the plates......Cliff

Title: Re: Oldsmobile 70-74
Post by: mcx on March 07, 2019, 11:10:34 AM

...yeah, this carb 7043252 has the base plate idle bypass at .059" and the throttle plates drilled at .111"
...I keep searching EBay for a cheap early 70s Pontiac version just so I  can have one to compare..soon enough.