carb suggestions

GLHS60 · Poncho Master!

RE: carb suggestions

SGS Welding · Guru

It's likely a toss up! Lol! So would the carb need to be built or adjusted differently now that I know the displacement is more? And is it an easy mod to convert to a manual choke? My cousin recommended doing that. And that's fine with me so long as I don't have to butcher things to attach it. Thanks fellas Greg

GLHS60 · Poncho Master!

No problem with the carb metering, assuming someone hasn't tampered with it and it doesn't appear so.
Its terrible to convert to manual choke, it's easier to make it work properly than ruin it.

Thanks
Randy

4SPEED427 · A Poncho Legend!

Agreed, do NOT convert to manual. An automatic choke is easily set up with a little bit of patience and the end result is no comparison to manual.

Big Bear · Addicted!

It's important to use the new materials in the rebuild that will stand up to the new fuels. I had to replace the TA's accelerator pump because it went soft and would'nt give a good shot. The local supplier sorced one made of a blue coloured material and had'nt a problem since. Barry

cdnpont · Canadian Poncho Superstar!

If the shafts are not too loose, why not try to rebuild it yourself.

Look on the web...there is a ton of reference stuff. Read too much. Save every diagram on file. Ask us anything.

Break it down. Be gentle. Don't bend the rods. Don't let stuff get away. Do not force a screw or nut. Lay everything out on a table, flat on a white sheet. Take tons of pictures as you go along.

Soak all the metal parts in a good carb cleaner for at least a day.

Remove. Blow all passages out with compressed air. Wipe down. Inspect. lay everything out. Blow out again. Check for excessive corrosion on all parts.

Get a feel for how the QJ works. Look at the diagrams. Learn how it flows. Fit it together loose. Learn the linkages. Take it apart. Don't force.

When you think you're ready, start a thread. Buy the newest kit you can find.

We're here to help.

cdnpont · Canadian Poncho Superstar!

Or this from a member....

qjet

1535936?AWSAccessKeyId=1XXJBWHKN0QBQS6TGPG2&Expires=1401926400&Signature=q6A8ytqkoHpBKeFDjoiduC5qxPw%3D

Reference informtion

427carl · A Poncho Legend!

cdnpont wrote:
Or this from a member....
qjet

Reference informtion

Agreed this is a steal buy it bolt it on and don't look back

Stephenzone · Canadian Poncho Superstar!

If you rebuild the carb. i use Cliff Ruggles out of the states. hes a american pontiac guy plus wrote a book that i use as a bible for quads

http://www.cliffshighperformance.com/

61TBEng3NyL._SX258_BO1,204,203,200_.jpg

-- Edited by Stephenzone on Friday 23rd of May 2014 08:27:00 AM

68 427 · Poncho Master!

427carl wrote:
cdnpont wrote:
Or this from a member....
qjet

Reference informtion
Agreed this is a steal buy it bolt it on and don't look back

bjburnout · Uber Guru

cdnpont wrote:
These guys did a nice job on my QJ, Carburetor Rebuilders

- had two Q Jets done by carb rebuilders..........outstanding workmanship........

the Beaumont will idle at 450 rpm and sit in 1st gear (4 speed) and just creep,

almost like an automatic..........makes driving it a pleasure......go with the pros

Bernie

SGS Welding · Guru

Ok just got my carb back from rebuild at carb rebuilders as suggested

long story short the carb was in tough shape,the good news is its just like new now.

Soo I bolt it on and hook everything up,runs perfect drives real nice

one problem

I cant seem to get the idle down low enough

even backing the idle screw all the way out it still revs too high

if you remove your foot from the brake the car starts to move

its close to right but not right and there is no more adjustment

whats my next move?

start adjusting the air mixter screws?

there is also a screw over on the choke side of the carb does it need tweaking?

GLHS60 · Poncho Master!

The screw on the choke side is to adjust high idle when the choke is on. When the choke is on it rides against a stepped cam that moves up as the choke closes. Check to see if the screw is in contact with the high idle cam, if it is, the choke is not opening fully.

Thanks
Randy

GLHS60 · Poncho Master!

Also do you have the correct carb base gaskets, and installed correctly?? If not there can be a vacuum leak that can cause high idle. There should be an asbestos style gasket on the intake manifold with a stainless shim between it and the carb base. They need to be installed correctly and can easily be up side down as they are asymmetrical in shape.

Thanks
Randy

Beaumont4008 · Uber Guru

Always thought it was the other way round. Steel shim on the manifold then the gasket.

Ian

GLHS60 · Poncho Master!

That's a common mistake, there is an exhaust crossover in the intake manifold and the asbestos style gasket seals the intake manifold to the steel shim. No gasket between the shim and carb.

Thanks
Randy

Beaumont4008 · Uber Guru

GLHS60 wrote:
That's a common mistake, there is an exhaust crossover in the intake manifold and the asbestos style gasket seals the intake manifold to the steel shim. No gasket between the shim and carb.

Thanks
Randy

Thanks, Good to know. Now I hope I can remember that when I put my 396 back together. Some thing tells me this question will be asked again. LoL

Ian

GLHS60 · Poncho Master!

This Q jet carb gasket topic has been coming up regularly since 1965 Ian, so it will no doubt keep coming up well into the future!!

Thanks
Randy

Stephenzone · Canadian Poncho Superstar!

heres a pic of some quadrajets on my 55 gmc

GLHS60 · Poncho Master!

QUAD QUADRAJETS.jpg

Looks good!!! Here's some pics. of the Q jets on my Pontiac.

Thanks

Randy

-- Edited by GLHS60 on Friday 20th of June 2014 02:38:22 PM

SGS Welding · Guru

I put the gaskets on correctly and I also installed a 3rd gasket between the carb base and the steel shim

a mr gasket 56

its supposed to keep things a little cooler and seal the bottom of the carb even better

rabbit64cs · Canadian Poncho Superstar!

your pontiac is running an olds engine ? NICE set up

GLHS60 wrote:
Looks good!!! Here's some pics. of the Q jets on my Pontiac.

Thanks
Randy

-- Edited by GLHS60 on Friday 20th of June 2014 02:38:22 PM

SGS Welding · Guru

Think I figured out why the carb wont idle down

if you push the secondaries that extra smidge towards the front of the car it idles down let go and it revs up ever so slightly

I think since it was just rebuilt things are a we bit tight and may wear in nice after a few drives?

any thoughts?

GLHS60 · Poncho Master!

rabbit64cs wrote:
You got me !!! I found the picture online.
Thanks
Randy
your pontiac is running an olds engine ? NICE set up

GLHS60 wrote:
Looks good!!! Here's some pics. of the Q jets on my Pontiac.

Thanks
Randy

-- Edited by GLHS60 on Friday 20th of June 2014 02:38:22 PM

73SC · A Poncho Legend!

Stephenzone wrote:
heres a pic of some quadrajets on my 55 gmc

Those look like a match set of Buick#240's that flow at 850 cfm each !!