Q-Jet help

[Woody Long]

I've got all the parts (I think) and have caught myself second guessing the decisions I've made.


This is what I have.


Intake
http://www.4wheeler.ca/uploads/1143422224/gallery_617_33_171399.jpg


Adaptors
http://www.4wheeler.ca/uploads/1143422224/gallery_617_33_24410.jpg


Carb 1
http://www.4wheeler.ca/uploads/1143422224/gallery_617_33_247838.jpg


Carb 2
http://www.4wheeler.ca/uploads/1143422224/gallery_617_33_185535.jpg



I put Carb 1 on the intake with the Adaptors and got this.....


http://www.4wheeler.ca/uploads/1131674010/gallery_617_33_15199.jpg

It was stated that the kickdown is too tight and replace the stud with a ball.

I need some more input and pictures of setups for automatic transmissions.

If this is going to be more of a problem than I hope for, what will be the easiest bolt in?

I'm a picture person so pictures will help me the best.

Thanks

[rustywagoneers_com]

you just need to make sure that with the carb all the way open, you can pull the kickdown out about an 1/8th inch... (you can tighten it to zero, if you really want the shifts late and the truck to kickdown to first really easily)
you may need to add material to the rod between the vertical bellcrank and the wire bail... i had to make a very funky one for the turbo wag... i will be updating that thread this weekend... but that is the simplest description i can give... make sure the kickdown has a hair of travel even at WOT... if you can get it by moving the wire bail, thats great... if not, cut and weld, baby...

peace
Dave


BTW... on the QJ with the straight inlet... open the choke flap and look down the primary bores... there will be a 'leg' that the booster vernturi cluster mounts to... loog at that leg... is there a 'hump' next to it, or is the bore concentric all the way around...

if it has a 'hump' that carb can be made to flow 795 cfm simply by making sure the secondary butterflies and air valve will open to 90 degrees... (many of them dont open to 90 originally - not too hard to adjust)

[Ristow]

you are going to lose a lot of efficiency,throttle response,and power using the open adapter on that dual plane manifold.
with what gas costs,you should think about finding a used,or just go new,edelbrock manifold,performer or sp2p,or offy,who makes an amc manifold with the rochester spreadbore pattern.
with edelbrocks sguare bore pattern,you can get a four hole adapter for the q-jet,and keep the planes devided.

[Woody Long]

Ristow,

Can you give me some examples of carbs that I can use instead? I don't want to swap out the intake right now plus I don't have any $$ to spend anyways.


Rustywagoneers,

Can't wait to see the pictures. Keep me informed please.

[Ristow]

there is none,that motorcraft is it's own pattern.
you're probably better off with the setup you have now,than trying to find a decent working 4350 motorcraft.
but,you'll not realize the full economy benefits,or performance benefits,the way it currently is.

[Arborigine]

The Q-jet is a great carb if you understand them. Get a copy of "Rochester Caburetors" by Doug Roe, published by HPBooks. Its ISDN number is 0-89586-301-4. Im not too fond of your open plenum adapter, but it will work of it clears the linkages

[rustywagoneers_com]

yall can call me adapter king... i am not proud,
but i am also not too concerned... ideal, no
workable, yes
especially for a low-rpm machine...

honestly, you COULD make that open adapter divided simply by
adding a divider... saw a slot front and rear, cut a piece of 1/8 inch aluminum from the hardware store to fit..
make sure the divider is CAPTURED in the slot when everything is bolted together..

and the QJ is one of the nicest carbs when they are set up right..

peace
Dave (pics tomorrow, honest...)

[Woody Long]

I ended up using a Edelbrock #2696 Square to Spread-Bore adaptor. Then I took the phenolic spacer, bolted it to the adaptor and proceeded to grind away to widen the hole and smooth the new tunnles. I drilled out the the carb mounting holes so I can bolt to the intake.

Looks good now, but I still need to smooth the surface out, I'll probably just buff it.


I didn't have my camera, but I should have it tomorrow.

I also heard something about drilling out the bushings in the throttle plate and pressing in new ones?

[rustywagoneers_com]

only if they are way bad... very expensive path, but sometimes necessary.. probably still easier to find a core with less shaft play than get one bushed... sorry i havent tossed a pic of the kickdown junk up here yet... my site may be down for a couple days... will get them here after that is all resolved..

peace
Dave

[Woody Long]

This is the adaptor I modded.

http://www.4wheeler.ca/uploads/post-617-1147226723_thumb.jpg

Note the square-bore gasket behind it.

http://www.4wheeler.ca/uploads/post-617-1147226743_thumb.jpg

http://www.4wheeler.ca/uploads/post-617-1147226766_thumb.jpg

[HeepofaJeep]

The Q-jet is a great carb if you understand them. Get a copy of "Rochester Caburetors" by Doug Roe, published by HPBooks. Its ISDN number is 0-89586-301-4. Im not too fond of your open plenum adapter, but it will work of it clears the linkages

Agreed... That book was VERY helpful for me!!!