Mangled Secondary Jets - Picture Included
Thread Starter
Intermediate
Joined: Mar 2005
Posts: 32
Likes: 0
From: Seattle WA
Mangled Secondary Jets - Picture Included
Well....I have been trying to get my Quadrajet back in running order...got the stock primary and secondary rods to replace the junk that was in there.
Tonight I was getting ready to put it back together when I noticed the mangled secondary jets. Looks like someone tried to 'drill out' the left one and only partially mauled the right one (see picture).
Wondering if there is anything that can be done with these secondary jets since you can't buy new jet inserts (like you can for the primaries).
BTW....I had this carb rebuilt and recolored here in the Seattle area about a year and a half ago...the car has never run quite right...I didn't suspect the carburetor until I started digging into it. I am now very disappointed the shop never mentioned any of this to me. I had to find out on my own that the rods were not stock and that these jets were all messed up.
Tonight I was getting ready to put it back together when I noticed the mangled secondary jets. Looks like someone tried to 'drill out' the left one and only partially mauled the right one (see picture).
Wondering if there is anything that can be done with these secondary jets since you can't buy new jet inserts (like you can for the primaries).
BTW....I had this carb rebuilt and recolored here in the Seattle area about a year and a half ago...the car has never run quite right...I didn't suspect the carburetor until I started digging into it. I am now very disappointed the shop never mentioned any of this to me. I had to find out on my own that the rods were not stock and that these jets were all messed up.
Thread Starter
Intermediate
Joined: Mar 2005
Posts: 32
Likes: 0
From: Seattle WA
Burning Brakes
Joined: Feb 2006
Posts: 1,024
Likes: 1
From: AL
only thing i can think of is to cut apart a donor. i have a donor that i've cut for other parts, but not the rear jets, so don't know exactly what's going on there. just hope they didn't screw up the casting when they drilled out the originals . . .
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Safety Car
Joined: Dec 2004
Posts: 4,071
Likes: 0
From: San Diego CA
Those almost look like you could some how tap em out and put in some from another one. However it may just be best to replace that whole part of the carb...
We'll just have to wait till we here from the man Lars to see what he says.
We'll just have to wait till we here from the man Lars to see what he says.
Drifting
Joined: Sep 2004
Posts: 1,959
Likes: 1
From: North Bend Ohio
I have heard of these being removed and jets being installed. The biggest problem is probably getting them out without boogering up the carb body. You would also need to be careful about getting the controlling surface of the jet in the correct position. If it is a little off you could tune around it using different secondary rod hangers but you would need to get it close.
It is salvageable.
BigBlockk
Later.....
It is salvageable.
BigBlockk
Later.....
Drifting
Joined: Sep 2004
Posts: 1,959
Likes: 1
From: North Bend Ohio
It's worth it in a numbers matching situation.
BigBlockk
Later.....
Last edited by BigBlockk; Jun 15, 2007 at 10:16 PM.
Burning Brakes
Joined: Feb 2004
Posts: 924
Likes: 2
From: Kearneysville West Virginia
No problem. Find your self a donor. One of my jets was damaged. They are very thin washer shaped pieces of stainless that are held in place by a retainer that is pressed in. You can carefully remove the retainer and jets from the donor and put them in your carb. Then use an appropiate size tool to tap the retainer back in. They are not in very tight, or at least mine were not. As I recall, all Quadrajets used the same size secondary jet.
Thread Starter
Intermediate
Joined: Mar 2005
Posts: 32
Likes: 0
From: Seattle WA
No problem. Find your self a donor. One of my jets was damaged. They are very thin washer shaped pieces of stainless that are held in place by a retainer that is pressed in. You can carefully remove the retainer and jets from the donor and put them in your carb. Then use an appropiate size tool to tap the retainer back in. They are not in very tight, or at least mine were not. As I recall, all Quadrajets used the same size secondary jet.
Le Mans Master
Joined: Apr 2005
Posts: 6,359
Likes: 428
From: Seattle Area WA
We still have some junk yards in Seattle that would have one, or I see them on Craigslist every once in awhile for around $25. I'd email Lars and maybe he knows of a place that he uses to fix this problem.
V8fastcars@msn.com
V8fastcars@msn.com
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,391
From: At my Bar drinking and wrenching in Lafayette Colorado
Once the secondary metering plates have been drilled and mangled, the carb is junk. The steel inserts are cast into the float bowl and are not replaceable. Installing a screw-in jet does not produce the same pressure drop across the metering hole due to the thickness (depth) of a jet versus the thin steel metering plate in the carb.
Lars
Lars
Racer
Joined: Apr 2006
Posts: 477
Likes: 43
From: Millbrae California
we do have the original secondary jet/restriction in stock if you do need them and the supplier i deal with has 800 of them in stock.
i have changed them in the past with no problems
henry @ oles carb
i have changed them in the past with no problems
henry @ oles carb
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
After looking at you picture a few times, it looks like one of the restrictor shims is already gone and the other one is mangled a bit. I'd guess that the one that's missing hasn't necessarily been drilled and may take a new shim just fine. Because of your numbers issue I'd definitely try to fix it. Even if it isn't dead nuts perfect it will be real close and will probably work well. Nice to see thet those restrictors are available!
Hans
Hans