Quadrajet stumble
#32
Senior Member
SENIOR BUILDER
Join Date: Apr 2009
Location: odessa texas
Posts: 103
yea so see if u wouldnt have made that remark i wouldnt have had to make that other remark.. so if ur gonna be pullin someones chain dont do it so hard.. theres a point in friendly joking and pisssing someone off
#34
Ok i like smack talking and fully support it...but lets Rip on each other...ain't no-body's wife's ,fathers,mothers,..or HEMRROIDS got nothing to do with this here Forum.....
lets keep it all on the table..ok Guys !
Thanks
lets keep it all on the table..ok Guys !
Thanks
__________________
Bjuice..
"I'M YOUR HUCKLEBERRY ! "
Bjuice..
"I'M YOUR HUCKLEBERRY ! "
#36
Senior Member
RACING JUNKIE
Join Date: May 2006
Posts: 2,044
Originally Posted by bowhay
ok well thats good but now that its done with
back to the problem at hand
and rochester q-jets they are vacume secondary, there is a lil rod that connects the vacume pump on the carb to the back barrels, and it is how u control when the barrels open
maybe iti got bent a lil more than it should be
idk just an idea
it happened to mine before i went holley
back to the problem at hand
and rochester q-jets they are vacume secondary, there is a lil rod that connects the vacume pump on the carb to the back barrels, and it is how u control when the barrels open
maybe iti got bent a lil more than it should be
idk just an idea
it happened to mine before i went holley
Too tight and they take to long to open up causing poor performance, too loose and they open to fast causing a bad bog but then takes off, sounds like yours are to loose.
And that pull off is associated with the choke, its needs full manifold vacuum on that hose, it disables the rear air valves till the choke has fully opened, if its not working or has a leak, the air valves may not open at all or open when the engine to cold to handle that volume of air.
Goodluck, Cp
#38
[/quote] Bowhay, actually there is a adjustment on a spring that controls the opening rate of the air valves ( the top set of butterflies) the bottom butterflies are mechanical, just like a holley double pumper, but the top set of butterflies (the air valves) control how much air that goes into the secondaries and how fast, its a bitch to set the spring properly trust me - you just have to play with it.
Too tight and they take to long to open up causing poor performance, too loose and they open to fast causing a bad bog but then takes off, sounds like yours are to loose.
And that pull off is associated with the choke, its needs full manifold vacuum on that hose, it disables the rear air valves till the choke has fully opened, if its not working or has a leak, the air valves may not open at all or open when the engine to cold to handle that volume of air.
Goodluck, Cp[/quote]
This is 100% correct. Due to the lack of a rear acc pump, you have to rely on the secondary circuits to pull the fuel. When his vacuum line was off, he went to a huge lean position, causing the hesitation.
I have been sucessful in running without the vacuum pod but tightening the spring on the upper butterflys. You had to be above 3500 to go WOT.
Dave
Too tight and they take to long to open up causing poor performance, too loose and they open to fast causing a bad bog but then takes off, sounds like yours are to loose.
And that pull off is associated with the choke, its needs full manifold vacuum on that hose, it disables the rear air valves till the choke has fully opened, if its not working or has a leak, the air valves may not open at all or open when the engine to cold to handle that volume of air.
Goodluck, Cp[/quote]
This is 100% correct. Due to the lack of a rear acc pump, you have to rely on the secondary circuits to pull the fuel. When his vacuum line was off, he went to a huge lean position, causing the hesitation.
I have been sucessful in running without the vacuum pod but tightening the spring on the upper butterflys. You had to be above 3500 to go WOT.
Dave