I hope this is not something that has been covered elsewhere, I have looked but have not found the relevant information. So my question is I have two Holley 94s on my T. I have been trying to match the carburettors to each other, I discovered that the pump links are different on each carb. One has D stamped into it while the other has C stamped into it. One is considerably longer than the other. This obviously means that the position of the pump operating rod is different on each carb. Is there a correct type of link to use? I have become fairly familiar with these carbs but I am far from an expert. Any advice will be greatfully received.
These links plug into one of the three holes in the throttle bracket. My understanding is that depending on what hole you put the link in you can make the mi xture leaner or richer, this seems to be achieved by raising or lowering the starting position of the plunger in the pump. The length of the link does the same thing. Is there a 'standard' link?.
The longer links are used with the Holley 94 style carbs like the Model 2100 that was used into the mid '50's. If you are using the pre-1949 Model 91-99 or Model 59 carbs with the 15/16 venturi then you should be using the shorter link stamped with the letter C.
Thank you for your reply, it made me take a closer look at what I thought to be two identical carbs. As you said one has a larger Venturi. This carb has the number 1 cast into the body along with EBV on the side. The other carb with the smaller Venturi has 94 cast into it and no identification on the side. I am presuming this is a pre 49 carb. I mixed the link pieces before I realised they were different so not sure which came from which carb. I'm getting another early body sent to me. So hopefully I can have a matching pair. So I should use the short links marked 'C' on these carbs?.
Thank you for your help. My new (old) early style carb body arrived yesterday. I will fit it tomorrow. I have already got a set of 49 jets and 50 jets, along with 3.5 and 4.5 power valves so I can work out what works best. I ordered these from Mike's. Great service and the parts arrived quickly from the USA to me here in the UK. I first tried to obtain these parts from vintage speed but they don't post to the UK. Hopefully with this set up I will be able to get my car running right ready for the summer.
As long as we're talking 94's, what am I missing on the replacing of the pump rod felt? I watched a rebuild video, and he just put it on the rod w/ the brass washer. It just falls down onto the actuator lever like pictured above, and does nothing. Tried google, but came up empty.
I run 3 94's on my Y block and I have a slight stumble just when the two end carbs open up. I noticed that there seems to be a little wasted pump stroke at the top end of pump travel. By this I mean that you must push the pump piston down a little in the bore to connect the link. So to take advantage of this unused stroke I made slightly longer links. this allowed the piston to start off its stroke at the very top of it's bore. I think the link is 1.25" from center of pin to center of pin.
Contact Charlie Schwendler, Formerly Charlie NY on the Ford Barn. Charlie is perhaps the most knowledgeable, and helpful person for ford 94 type carburetors. Here is his e-mail address, cas5845@yahoo.com
Thank you, I fitted the 49 jets and 3.5 power valves along with the 'new' matching body. It still runs rich. So still some sorting out to do. It gets expensive with postage from the US.
Just an update, I spent a bit of time setting the carbs up and I have the T running really nicely now. So to reiterate, I swapped one of my carbs bodies to give me two early style carbs. I used 49 jets and 3.5 power valves in both carbs. The engine ticks over (idles) very well and has good response to the accelerator with little if any stumble or hesitating once warmed up. There is no cloud of black smoke like there was before. I will fit a new set of plugs soon and see how they look but the ones I have got, have a brown colour at the electrodes now rather than being black so looks like I have got it sorted enough for the upcoming summer runs. I also put two rebuilt bases on the carbs fitted with new, longer butterfly rods. The old ones were a bit worn.
I didn't know there were two different lengths of link. Thanks for the thread and glad you have it running right. Mart.
from all of my readings on this forum, to have two carbs the same, (for fixed linkage set up), is the key to the start of a good running set up. I chased an over rich situation with two identical carbs for some time. ( 2 x 1&1/16” Holleys). Eventually realised that one had a minute crack in the casting and was leaking a little, probably from me over tightening it. Once it was swapped with a better base, the car ran much better ………
The Jalopy Journal
