Psychopete
New Member
Hello!
I have adapted a Holley 1920 from a "running" pre-73 (no EGR) Dodge Slant 6 onto a Ford SOHC 2.0L. The carb I bought used off of Ebay, the reason I chose this carburetor is the venturi size/fitment, the 3" center-to-center 2 bolt pattern, simplicity, and of coarse cost (it was 20 bucks). Big plus is that I had most of the materials to adapt it on there.
I already have known issues I need to work out, I found that the distributor was loose, and I don't have a timing light right now. Vacuum system is a mess, but I spent an hour or so this morning spraying around and fixed a few vacuum leaks. I need to get plugs from the hardware store and just remove the taps. I need to set the idle mixture, but I can't do this until I set the timing and get the idle ball park. I need to put a vacuum gauge on it also.
Right now it seems to idle and run decent, but there is a serious hesitation when applying throttle very quickly in park. I know this will be exaggerated under load, so I have not even attempted to test drive the vehicle. Otherwise the engine runs very smooth.
Now here is my question;
Should I be seeing a shot of fuel in the venturi when throttle is applied, like what you would expect to see from a squiter in say a 4160 model? Right now it doesn't look like I am seeing any shot of fuel to compensate for the vacuum drop.
It would seem so looking at the carburetor manual (Pg 14 Fig 9) -
http://u225.torque.net/cars/SL6/docs/Holley_1920_Manual.pdf
But I wanted to make sure that I was looking in the right place.
And I was wondering if someone could fill me in on a little bit of the operation, and how it should be working? Right now when you apply throttle, the accelerator pump diaphragm arm goes in VERY slowly. I can make a video of this, but I was wondering if someone could fill me in on this.
If it's supposed to be somewhat fast, and I am supposed to see a shot of fuel from the accelerator pump, it would seem that the pump discharge check value is stuck or there is a plug in the system - either not providing fuel for the diaphragm to push, or forcing the fuel back into the fuel bowl back through the inlet check ball. (just thinking out load)
Thanks for reading and any ideas/info you can share.
Pete
I have adapted a Holley 1920 from a "running" pre-73 (no EGR) Dodge Slant 6 onto a Ford SOHC 2.0L. The carb I bought used off of Ebay, the reason I chose this carburetor is the venturi size/fitment, the 3" center-to-center 2 bolt pattern, simplicity, and of coarse cost (it was 20 bucks). Big plus is that I had most of the materials to adapt it on there.
I already have known issues I need to work out, I found that the distributor was loose, and I don't have a timing light right now. Vacuum system is a mess, but I spent an hour or so this morning spraying around and fixed a few vacuum leaks. I need to get plugs from the hardware store and just remove the taps. I need to set the idle mixture, but I can't do this until I set the timing and get the idle ball park. I need to put a vacuum gauge on it also.
Right now it seems to idle and run decent, but there is a serious hesitation when applying throttle very quickly in park. I know this will be exaggerated under load, so I have not even attempted to test drive the vehicle. Otherwise the engine runs very smooth.
Now here is my question;
Should I be seeing a shot of fuel in the venturi when throttle is applied, like what you would expect to see from a squiter in say a 4160 model? Right now it doesn't look like I am seeing any shot of fuel to compensate for the vacuum drop.
It would seem so looking at the carburetor manual (Pg 14 Fig 9) -
http://u225.torque.net/cars/SL6/docs/Holley_1920_Manual.pdf
But I wanted to make sure that I was looking in the right place.
And I was wondering if someone could fill me in on a little bit of the operation, and how it should be working? Right now when you apply throttle, the accelerator pump diaphragm arm goes in VERY slowly. I can make a video of this, but I was wondering if someone could fill me in on this.
If it's supposed to be somewhat fast, and I am supposed to see a shot of fuel from the accelerator pump, it would seem that the pump discharge check value is stuck or there is a plug in the system - either not providing fuel for the diaphragm to push, or forcing the fuel back into the fuel bowl back through the inlet check ball. (just thinking out load)
Thanks for reading and any ideas/info you can share.
Pete
