Jaguar Repair: 69 USA E type Stromberg 175 CD2SE, fuel air mixture, stromberg carburetor

Question
I have taken out and refitted the brass jet assemblies which fit into the bottom of the float chambers. That was my first mistake ...
Is there a guideline as to how to re set this assembly? In other words, do I screw it in entirely and then back it off?

The car has little power, 60 top speed and it doing about 8 to the gallon

Thank you, sir          Michael  

Answer
Hi Michael,
The CD-2SE Stromberg carburetor had fixed jets. (not removable)If you are talking about the tube that screws into the bottom of the carburetor with the "O" ring that seals the float chamber, that screws all the way up tight. The actual jets (brass) are pressed in the the carburetor body and are not removable nor adjustable. The needle in the piston is adjustable from above with a 3mm Allen wrench. Some came with a plug over the adjusting screw to prevent tampering with the adjustment.
While it is true that the 69 "E" type was a "Slug" as compared to a 67 "E", it still should run fairly good (well over 100 MPH) and get much better fuel mileage on the highway than 9 MPG. I could easily get a 67 to get 28 to 29 MPG at 70 MPH. and run close to 150 MPH. The 69 didn't do that well but you should see over 20 MPG highway and run well over 100 MPH.

You have something major wrong if the car will only run 60 MPH so you need to do what I would have to do if that car was brought to me in 69 with that complaint.

First I would run a compression test to confirm that the combustion chambers were correct. (run the tests with the throttle open.) (you should see from 125 to 180 PSI on an compression test with little difference between cylinders)
It is absolutely no use going further if that is not correct.
If that is correct check the ignition timing (specs are on a sticker on the under side of the hood) (I believe your car is 10 deg BTDC)The stickers may be faded or gone by now.
If your car has the double throttle plates that rout the fuel air mixture through tubes in the intake manifold, be sure that the carburetor and the manifold throttle plates are connected and moving correctly.
Also, since the car is so old you should run a intake manifold vacuum test and see that the vacuum never drops below 5 in hg even at full throttle and full load. (an indication of a partial stopped up exhaust system)
Howard