Su carb oil fill
Rotary Car Performance - S U Carbs - Need help finding a rebuild kit and or any information on these carbs. i don't know what model they are, Buy Penrite SU & Stromberg Carburettor Damper Oil 150ml at Amazon UK. Free delivery on eligible orders. SU Carb Dashpot Oil The purpose of the SU damper is to retard the rapid upward movement of the piston on the rapid throttle opening associated with acceleration. This delay in piston movement causes a momentary decrease in pressure at the throat, thus achieving a momentary increase in richness much the same as with an accelerator pump. The bottle shown in the test is labelled “SU Damper oil” so it should flow like any other SAE 20 at normal temperature – say 70 degrees Fahrenheit. So… it could be that the oil inside the bottle is not genuine SU Damper oil as supplied by SU Carb Co or maybe the ambient temperature was hot – say over 100 degrees F. SU Dashpot oil - manufactured for the specific application of SUs in STANDARD applications. That is on engines that are completely standard as the manufacturer produced them. It is a little on the thin side, but the whole engine tuning data for each engine is based on using this oil. Most Automatic Transmission Fluid is 20wt oil. And several people use it in the carbs. I do and have no problems. The fill line is on the shaft. Don't worry if you over fill. It will get sucked into the engine and burn off.
SU DAMPER OIL is a Mineral based oil containing anti-corrosion and anti-wear additives for the lubrication of pistons and dampers in SU and Stromberg carburettors. Application SU DAMPER OIL is suitable for post 1940 vehicles using SU and Stromberg carburettors incorporating a damper in the dashpot assembly.
Fill piston damper bowl is filling and that there are no fuel with SU carburettor leaks from the carburetors oil or oil with similar. 5. Start car and check again for fuel This web page on the Hitachi-SU carburetor is copied from a Service Manual Total oil volume is approximately 3 cc (0.18 cu in). Slowly fill damper with oil to Rotary Car Performance - S U Carbs - Need help finding a rebuild kit and or any information on these carbs. i don't know what model they are, Buy Penrite SU & Stromberg Carburettor Damper Oil 150ml at Amazon UK. Free delivery on eligible orders. SU Carb Dashpot Oil The purpose of the SU damper is to retard the rapid upward movement of the piston on the rapid throttle opening associated with acceleration. This delay in piston movement causes a momentary decrease in pressure at the throat, thus achieving a momentary increase in richness much the same as with an accelerator pump.
Check also for vacuum leaks, a vacuum leak will lean the mixture. Check the level of the dashpot oil – use 20w oil or specific SU dashpot oil. The piston rising without restriction prevents enrichment necessary for acceleration. Ignition too far advanced or retarded – ignition occurs while valve is still open.
On older SU carburettors, which have a vent hole in the screw-in plastic top of the dashpot, the oil level should be i in. (13 mm) above the top of the piston tube. On dustproof SUs, which have a hole in the dashpot neck instead of the top, the oil should be i in. (13 mm) below the piston top.
1 Sep 2014 People frequently visit this post hoping to find information on how much oil should be put into SU carburetor dashpots. The quick and dirty answer
SU Dashpot oil - manufactured for the specific application of SUs in STANDARD applications. That is on engines that are completely standard as the manufacturer produced them. It is a little on the thin side, but the whole engine tuning data for each engine is based on using this oil. Most Automatic Transmission Fluid is 20wt oil. And several people use it in the carbs. I do and have no problems. The fill line is on the shaft. Don't worry if you over fill. It will get sucked into the engine and burn off. Fill it to the top of the piston hollow and let it back down, then put in the plunger. This will displace a small amount of oil onto the piston shaft to lubricate it and keep things going nicely (some even have bearings here that really enjoy being lubricated as such).
The S.U. carburettor is one of the simplest carburettors ever invented! Unfortunately The dashpot assembly is filled with oil of appropriate viscosity. I'll explain
Rotary Car Performance - S U Carbs - Need help finding a rebuild kit and or any information on these carbs. i don't know what model they are, Buy Penrite SU & Stromberg Carburettor Damper Oil 150ml at Amazon UK. Free delivery on eligible orders. SU Carb Dashpot Oil The purpose of the SU damper is to retard the rapid upward movement of the piston on the rapid throttle opening associated with acceleration. This delay in piston movement causes a momentary decrease in pressure at the throat, thus achieving a momentary increase in richness much the same as with an accelerator pump. The bottle shown in the test is labelled “SU Damper oil” so it should flow like any other SAE 20 at normal temperature – say 70 degrees Fahrenheit. So… it could be that the oil inside the bottle is not genuine SU Damper oil as supplied by SU Carb Co or maybe the ambient temperature was hot – say over 100 degrees F. SU Dashpot oil - manufactured for the specific application of SUs in STANDARD applications. That is on engines that are completely standard as the manufacturer produced them. It is a little on the thin side, but the whole engine tuning data for each engine is based on using this oil.
How To Repair, Overhaul, Strip Down and Re-Assemble the SU Carburettor. Fill the damper with 20W50 grade oil to about 13 mm above the top of the moving Many of the SU carbs I see have had dampers replaced with the wrong type. If it still doesn't want to turn. squirt an aerosol penetrating oil through the float The proper procedure is to fill to 1/2″ below the top of the hollow piston rod. not Fill piston damper bowl is filling and that there are no fuel with SU carburettor leaks from the carburetors oil or oil with similar. 5. Start car and check again for fuel