Need main jets for Q jet...

Ed Wright · 02-05-2020, 05:01 PM

I’m sorry, John. I don’t recall a MOPAR through my shop with a Quadrajet. Maybe it was “a California thing”? Due to their emissions restrictions, I saw a lot of California vehicles come through with different carburetors, etc. Certainly had much less spark advance. Very different advance curves in their distributors. Much of my business in the late ‘60s & ‘70s was “re-curving” distributors for performance & gas mileage. Very easy to pick up a CA vehicle 5 mpg. Taking away spark advance to lower HC emissions was a very common thing. That also kills drivability, power and gas mileage. There was a big fire at the plant where Rochester built carburetors, so GM had Carter build Quadra jets for a while. Carter would likely be the source for Q-Jets for MOPAR. Hard for me to imagine GM providing carbs to MOPAR. Old as I am, I have not seen everything.

02-05-2020, 05:01 PM	#10
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Need main jets for Q jet... I’m sorry, John. I don’t recall a MOPAR through my shop with a Quadrajet. Maybe it was “a California thing”? Due to their emissions restrictions, I saw a lot of California vehicles come through with different carburetors, etc. Certainly had much less spark advance. Very different advance curves in their distributors. Much of my business in the late ‘60s & ‘70s was “re-curving” distributors for performance & gas mileage. Very easy to pick up a CA vehicle 5 mpg. Taking away spark advance to lower HC emissions was a very common thing. That also kills drivability, power and gas mileage. There was a big fire at the plant where Rochester built carburetors, so GM had Carter build Quadra jets for a while. Carter would likely be the source for Q-Jets for MOPAR. Hard for me to imagine GM providing carbs to MOPAR. Old as I am, I have not seen everything. __________________ Ed Wright 4156 SS/JA