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New Carb, no go
https://www.slantsix.org/forum/viewtopic.php?t=31114		 Page 1 of 2
Author:  DustedIn05 [ Mon Sep 15, 2008 12:01 pm ]
Post subject:  New Carb, no go
I sorta finished the <beyond> the super six upgrade.

I was able to get the cut manifold brazed, so that was plus, and thanks for the help in the other thread.

I have the manifolds and the holley 2300 mounted.
Connected the fuel line.
Connected the distributor vac hose.
Plugged off the bottom carb vac port for now which i believe is where i connect the charcoal canister, or possibly the pcv.

Tied a wire to the throttle lever, and cranked it over. She ran for a second or two then died.
I adjusted, not in a good way, the idle screws, and cranked again. She ran for a few seconds then stumbled, so i pulled on the wire to keep her going until i saw flames shoot out of the carb :shock: . I shut it off, and put out the small fire.

Before i left for the day, i'll go back when i have a fire extinguisher, i turned both idle mixture screws clockwise, to the full in position.

The engine is a stock 225, and this is the first upgrade.

The only thing i could think of is that the top left stud came out with the nut, and antifreeze poured out. I don't think any went into the port because i had a rag there and funneled it into an empty gatorade bottle, and when i stuck my finger in there with a rag it was dry.

Any help on what i should do next would be great.

Edit: I've searched the board, and it looks like the stock 61 jets are to big for a stock engine. I'll try downsizing to 54's and see what happens.
Author:  DustedIn05 [ Sat Sep 20, 2008 6:11 am ]
Post subject: 
Ok, I rejetted the carb to 54's.

I've got fuel, and spark.

I was able to get the engine to run for about 5 seconds this time before it died.

On a side note. I tuned the car about a week before with the 1 bbl. and she was running fine.

I'm a novice when it comes to carbs, but i noticed that the 5 seconds of idle is very slow, no fast idle.

A friend of mine is going to help me out sunday.
Author:  Aggressive Ted [ Sat Sep 20, 2008 7:42 am ]
Post subject: 
Adjust the idle screw by turning it in so it raises the idles speed.
Author:  DusterIdiot [ Sat Sep 20, 2008 8:19 am ]
Post subject:  also...
Is this a new carb or a junkyard find? Is it rebuilt or 'as is'...

I'm thinking the float is set too high as well as the idle set screw is not
in far enough...

since it's a holley, you can pull the big 'sight' screw on the side of the bowl... if the fuel level is correct you will get a little trickle of fuel out of it if you shake the car...

-D.Idiot
Author:  DustedIn05 [ Sun Sep 21, 2008 1:37 pm ]
Post subject: 
The carb is brand new. I won't get to play around until tomorrow now, but i'll try adjusting the fast idle screw, and the float.
Author:  Guest [ Sun Sep 21, 2008 3:56 pm ]
Post subject: 
So you got the O-7448 carb? If so you should have no trouble with it unless something is internally wrong. My first new one had a broken accelerator pump so I sent it back for replacement.

Even so, you are just trying to get it to idle, right? No need to mess with the stock #61 jets right now, just get it idling first. Mess with the idle screws.
Quote:
Ok, I rejetted the carb to 54's.
That is going to be INCREDIBLY lean for the O-7448 (if that's what you got). The #61s are already fairly lean for it...as least that's what i've found so far...still verifying.
Author:  SV162 [ Sun Sep 21, 2008 7:40 pm ]
Post subject: 
Quote:
That is going to be INCREDIBLY lean for the O-7448 (if that's what you got). The #61s are already fairly lean for it...as least that's what i've found so far...still verifying.
I agree, I've run 63's in 350 Holley on a stock 225 with out any problems.
Author:  DustedIn05 [ Mon Sep 22, 2008 8:45 am ]
Post subject: 
Image

Hope the image isnt too big.

You know what a dimwit is. me.. :oops: I was adjusting the curb idle screw instead of the fast idle screw. Having the book with you helps.

I turned out the idle adjustments about 1 1/2 turns so far, and turned the fast idle maybe 3 turns to get an 1800 rpm fast idle.

I was real happy until i noticed where the dutra portion of the exhaust dumps the hot air, and thought kabooom, so i shut her down for now.

So next is:

Dans fuel line mod
Hooking up a manual choke
Figuring out how to hook up the throttle cable
Figuring out how to hook up the lokar kickdown.
Buying a vacuum gage, and read some more, since i don't know how to tell where too rich or lean are yet.

Thanks.
Author:  Guest [ Mon Sep 22, 2008 9:07 am ]
Post subject: 
Quote:
Figuring out how to hook up the throttle cable
Figuring out how to hook up the lokar kickdown.
Do you have a standart supersix kickdown? If so that makes life easy for the kickdown and the throttle linkage.
Author:  DusterIdiot [ Mon Sep 22, 2008 7:25 pm ]
Post subject:  Easy...time to go yarding...
Quote:
Dans fuel line mod
Hooking up a manual choke
Figuring out how to hook up the throttle cable
Figuring out how to hook up the lokar kickdown.
Buying a vacuum gage, and read some more, since i don't know how to tell where too rich or lean are yet.
the thottle cable needs a throttle bracket... go visit local yards and see if you can find a 1976-1980 Dodge Aspen or Plymouth Volare slant six 1 or 2v... if it has cruise control it will have the throttle bracket that will work best for your application. the lokar cable end shoudl fit in the lowest hole in the throttle lever... you will need a holley throttle stud or a carter BBD stud and a couple of washers to hook the cable to the throttle lever correctly. Holley as a manual choke bracket that should just replace the no existant choke setup(or the electric one if so equipped)... depending on the year of your car, the late cars had a 'dimple' where the underdash remote hood latch went through the firewall.... this makes a nice spot for the choke cable to go through.


-D.Idiot
Author:  DustedIn05 [ Tue Sep 23, 2008 6:29 am ]
Post subject: 
Image

I found it digging around last night, so i sanded and painted it.
I don't have that tail piece that is connected to the transmission though, and read that it could be a problem? If so i'll keep the lokar.

I might have my local parts guy order holley p/n 20-36 throttle stud and p/n 20-7 throttle extension lever for the carb throttle connection, and see if he has a choke cable.

Do i need a throttle return spring, i noticed this carb already has one built in?

Also, where can i get a flange for the dutra exhaust? Are they all universal?

I can connect the stock exhaust back up temporarily, but i want to run a pipe out under the body just so i can drive it to the muffler shop.
Towing isn't an option, and i also read here that driving without the exhaust hooked up can mess things up.

Thanks alot for your help so far guys!
Author:  Guest [ Tue Sep 23, 2008 8:31 am ]
Post subject: 
Quote:
I found it digging around last night, so i sanded and painted it.
I don't have that tail piece that is connected to the transmission though, and read that it could be a problem? If so i'll keep the lokar.
Get creative, go to a hardware store and do some digging. On mine I cut the very tip off and used an old broken allen wrench. I hose-clamped it to the shaft and adjusted it until it was the right length, then secured it to the shaft (hose clamps and JB weld). After that I used a throttle connecting bracket to secure it nicely and 'loosely' so it doesn't bind to the pressure lever.
Quote:
Do i need a throttle return spring, i noticed this carb already has one built in?
Yes you need one, the stock one should work fine. If not easily make a bracket that bolts to side holes next to the mounting holes on the kickdown linkage...very simple.
Quote:
I might have my local parts guy order holley p/n 20-36 throttle stud and p/n 20-7 throttle extension lever for the carb throttle connection, and see if he has a choke cable.
Please let us know how these parts work out.
Author:  DustedIn05 [ Tue Sep 23, 2008 10:31 am ]
Post subject: 
Quote:
Get creative, go to a hardware store and do some digging. On mine I cut the very tip off and used an old broken allen wrench. I hose-clamped it to the shaft and adjusted it until it was the right length, then secured it to the shaft (hose clamps and JB weld). After that I used a throttle connecting bracket to secure it nicely and 'loosely' so it doesn't bind to the pressure lever.
I haven't taken a look at it yet, but you did that to make the 1 bbl kickdown transmission end tailpiece work?
Author:  Guest [ Tue Sep 23, 2008 7:56 pm ]
Post subject: 
I can't remember which tailpiece it was.
Author:  DusterIdiot [ Tue Sep 23, 2008 8:25 pm ]
Post subject:  Late cars...
Quote:
I haven't taken a look at it yet, but you did that to make the 1 bbl kickdown transmission end tailpiece work?
The vary late cars (Aspen/Volare/Diplomat) use the same spring loaded end on their kickdown linkage from about 1977+ or so... so if you have a junkyard with some early-mid- 80's dippy's, 5th ave, etc... you might find the spring and tail peice... (even the 1 barrel kickdown from a 1978 Volare would have this)

-D.Idiot
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