| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
08-31-2022, 02:02 PM
|
||||
|
||||
455 HO Q-Jet 17057256
455 HO Q-Jet 17057256
Does anyone know if this is an 800 CFM carb? Thanks
__________________
Tim Corcoran |
|
#2
08-31-2022, 02:42 PM
|
||||
|
||||
|
If each primary has only 2 boosters rings and not 3 then it’s a 800 model.
__________________
I do stuff for reasons. |
|
#3
08-31-2022, 03:19 PM
|
||||
|
||||
|
17057256 is 1977 unit from an Olds 350 engine.
It´s a nice candidate for performance usage, and yes, it is a 800 cfm casting with 3 booster rings. |
| The Following User Says Thank You to Kenth For This Useful Post: | ||
|
#4
08-31-2022, 03:57 PM
|
||||
|
||||
|
Here in these first two photos what a true 71 to 72 455 HO carb looks like.
The third photo is a normal 750 carb, note the dimples in the primary throttle bores. In the fourth photo is a 800 cfm 3 booster ring 455 SD carb from the 73 to 74 era. Note that it has no dimples in the primary throttle bores because that’s how much bigger they are. These later 800 size carbs with there 3 rings are far more responsive from off idle to about 2500 rpm, and that means a lot on its own no less if you have a auto trans car!
__________________
I do stuff for reasons. |
|
#5
08-31-2022, 03:59 PM
|
||||
|
||||
|
Quote:
I was going to say that ti was: 1) a 1977 model year unit 2) not a Pontiac unit
__________________
1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
