Quad carb
Thread Starter
Racer
Joined: Nov 2020
Posts: 265
Likes: 76
Quad carb
Hello All,
I have a 1980 C3 with L48 and new top end. I'm trying to dial everything in but I find that power surges once secondary opens up. I made sure that butterflies were opening when engine was warm and found that the power would somtimes pop in other times it wouldn't. I then pulled back secondary primaries (top ones controlled by vacum) and power was always there when I stomped on it but it initially bogs like it's flooded? Not sure what adjustment or what I should check can be made improve the situation.
I've heard that Lars will do carb rebuild so not sure if that is necessary. Car runs fine on primaries just intermitant once secondaries open up.
Thanks
I have a 1980 C3 with L48 and new top end. I'm trying to dial everything in but I find that power surges once secondary opens up. I made sure that butterflies were opening when engine was warm and found that the power would somtimes pop in other times it wouldn't. I then pulled back secondary primaries (top ones controlled by vacum) and power was always there when I stomped on it but it initially bogs like it's flooded? Not sure what adjustment or what I should check can be made improve the situation.
I've heard that Lars will do carb rebuild so not sure if that is necessary. Car runs fine on primaries just intermitant once secondaries open up.
Thanks
Safety Car
Joined: Oct 2007
Posts: 4,358
Likes: 1,724
From: Seattle Area Washington
Do you recommend that before making the adjustment, air doors closed rotate the slotted shaft so the pin in main shaft just makes contact with the loop of the spring before making adjustment?
Race Director
Joined: May 2006
Posts: 18,656
Likes: 2,561
in case he doesn't answer soon, the 3/4 setting is from the point where you already have enough tension against the spring to hold the door fully closed so in order for that to happen the pin would have to be in contact with the spring.
Thread Starter
Racer
Joined: Nov 2020
Posts: 265
Likes: 76
Thank you.
