One way to do this to go very large on the factory-installed orifice, then solder the opening shut. I chose to go with leaving it the natural color of cast steel. Fuel delivery system test - basically, you are checking to make certain the fuel delivery system is delivering fuel to the carburetor. Repair should not be attempted using either a torch, or a soldering gun. One float piece will also have a small hole for temperature equilization. You want to tune the engine by sound.
At this point, lettered bits take over. The pressure will force the liquid from the float. Carb Assembly The hardest part of this was remembering how the springs go back on. You can check the fast Idle screw under the choke assembly to confirm that it is not in contact with the choke fast idle cam. Because only a few of these carburetors are on the road today, suffice it to say that a few special tools available from aftermarket tool suppliers are required to adjust the primary metering rod height and travel during a rebuild.
Tripower was used by General Motors on Cadillac 1958-1960 ; Chevrolet 1958-1961 ; Oldsmobile 1957, 1958, and 1966 ; and Pontiac 1957-1966. If you haven't had the opportunity, check out. You will need the spring that goes under the pump, put that in first. The information below is general. The correct gasket will be in the kit. The sales pitch - if the carb needs rebuilding, we can probably help you with a rebuilding kit. If the springs are reversed and the return spring that should be under the pump assembly is used as the override spring on the shaft, and the override spring is used under the assembly, that can cause it to work poorly.
Becoming familiar with the carburetor If you have never dealt with a carburetor in your life, it is important to familiarize yourself with the various components. Check the hose to the wipers, maybe even plug the fitting till we get thinks running right. Do not waste your time with them. Sometimes, on the bottom of the Body assembly, that same number is stamped on the underside. If you keep the charger plugged into a socket close to where you are working, charging the battery during down time is a breeze. Caution: Do not overtighten any vacuum fitting or plug into the baseplate! This is another tuning aid when dealing with long duration or overlap cams.
In any case, you want to be sure the floats are not interfering with the gasket or anything else. While a number of issues may cause this problem, by far the most common issue is the volatility of modern fuel. It can be carefully bent to set the opening amount. Generally speaking, there's no harm in doing this as long as it has been done correctly. Remember, to remove Loctite Red you have to heat the screws up to 500 degrees! While this may be true, until you have a good grasp on the engine tune, and unless the plug readings indicate a need for this, keep them at 90°. If you see the straw move up and down, you know that the power piston valve spring is too strong for the vacuum produced by the engine at idle and needs to be replaced with a lighter weaker spring. If the settings are other than described then you may want to recalibrate the Idle circuit low speed circuit to your engines needs.
This is only one of the reasons we want a tag number when we supply a kit, as our kits are manufactured by us to the original Rochester bill-of-material. It just restricts air flow for your purposes, so no need to have it in there. It will save the screws and cause you from having to drill out and re-tap a very intricate assembly. Achieving the best idle at under 2 turns indicates the need for a smaller idle jet. Also if the power piston is moving up and down at idle, the engine rpm will also be unstable and will rise and fall. Thread offers information on power piston springs in relation to tuning a Rochester Quadrajet. Also, there shouldn't be a noticeable transition into the secondaries.
I replaced the water pump and put a 7 lb. Although application needs vary, Murphy recommends 0. Get it nice and tight. Be sure the ball is in place and sealing as it should. To do the staking, you can clamp a piece of square stock into a vice to use as an anvil to support the screw head on, then peen the ends of the screws with a small jeweler's hammer or ball peen. A good idea is to take pictures as you go. Basically if it idles good and the idle is steady even when the throttle shaft is moved fore and aft, it's good to go.
Keep track of the orientation of the float. The rotating parts of the engine can cause personal injury and may damage tools and test equipment. Interspersed throughout these are also the fractional and metric sizes. Skipping this step can result in a large puddle of fuel on the workspace. It also makes assembly of the metering rods much easier. To get the plug out you will need to remove the air horn. I highly recommend trying this mod to your truck.
The purpose of changing the spring is to allow the power valve to remain closed at high vacuum cruise and open at W. The rod is attached to the air valve shaft green and is how it puts tension on the flaps. One can then drill these tubes oversize. Compression test - my compression ratio is a number, and the compression gauge reads pounds, what gives????? If all is still best and smoothest idle then confirm and note the final settings. Carefully lay the top cover upside down on the table. This paragraph applies to an instantaneous bog, hesitation, or stumble upon acceleration.