Su carburettor oil

SAE 20 engine oil is the correct grade to use when you top up. On older SU carburettors, which have a vent hole in the screw-in plastic top of the dashpot, the oil  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  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 

You can buy specific dashpot oil for the SU carburettors,..Penrite make some. Alternatively, standard 20W-50 engine oil is perfectly satisfactory with a standard engine. As for how much, unscrew the piston rod. Fixed jet carbs inject a squirt of fuel from the accelerator pump that is independent of the running temperature, whilst as Barrie has pointed out, using a monograde oil such as SAE 20 allows the SU to enrich the fuel/air ratio in sympathy with the running temperature due to the greater change in the oil’s viscosity over say a 20W/50 multigrade. SU carburettors featured a variable venturi controlled by a piston. This piston has a tapered, conical metering rod (usually referred to as a "needle") that fits inside an orifice ("jet") which admits fuel into the airstream passing through the carburettor. The SU carburettor is simple to strip. It has only one jet (except in a few special types) and very few moving parts. It is very reliable, but it can become dirty and choked — and some parts wear out. The most common type of SU is the HS. The HIF, overleaf, differs in some ways. They should be removed from the engine for cleaning. 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.

Penrite 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 

Assuming that SU Damper oil is indeed equivalent to SAE 20, oil, then what we know for “certain” is that at 0F, the Mobil 1 is slightly less viscous than the SU Damper oil, and that at 212F, the Mobil 1 is considerably more viscous than the SU Damper oil. The first is SU Damper Oil, which is a straight 20 grade and comes in a handy 125ml bottle. This oil is for use where the carburetter is fitted with a damper inside the piston and can be used on all SU, Zenith and CD carburetters. SU Damper Oil (125ml), Part No: BDR125S The second type is SU Dashpot Oil, 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. Barney Gaylord (the MGA guru) says that all he does to check his SU oil level is simply to unscrew the plunger, start to withdraw it, and if there is resistance (due to the oil), then he screws it back down without taking it out. In other words, if there is resistance, then it has enough oil. A lot of people make the mistake of over filling. It's important that the dashpot on your carburettor is filled with oil, preventing fluctuations in fuel/air mixture under acceleration. SU damper oil is designed specifically for this job.

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 

25 Nov 2019 Coconut oil is said to aid weight loss, but you may wonder whether there's any science to back up this claim. This article reviews whether  Assuming that SU Damper oil is indeed equivalent to SAE 20, oil, then what we know for “certain” is that at 0F, the Mobil 1 is slightly less viscous than the SU Damper oil, and that at 212F, the Mobil 1 is considerably more viscous than the SU Damper oil. The first is SU Damper Oil, which is a straight 20 grade and comes in a handy 125ml bottle. This oil is for use where the carburetter is fitted with a damper inside the piston and can be used on all SU, Zenith and CD carburetters. SU Damper Oil (125ml), Part No: BDR125S The second type is SU Dashpot Oil, 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.

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.

SU carburettors are a brand of carburettor of the constant-depression type. The design was in To prevent erratic and sudden movements of the piston it is damped by light oil (20W Grade) in a dashpot, which requires periodic replenishment. Su Carburetters are The Worlds Sole Manufacturer of Genuine SU Carburettors, Fuel Pumps and Spares. The second type is SU Dashpot Oil, which is for use in earlier, pre-war, SU carburetters where no damper is used. In the case of carburetters fitted with dampers  SU Carbs - Dashpot oil. This subject is a regular message-board poser. Many of us have touted our preferences and discoveries whilst playing about over the  SAE 20 engine oil is the correct grade to use when you top up. On older SU carburettors, which have a vent hole in the screw-in plastic top of the dashpot, the oil 

Here we have for sale Genuine SU oil for the dashpot in your SU Carburettors 1x 125 ml bottle.

Penrite 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 

Su Carburetters are The Worlds Sole Manufacturer of Genuine SU Carburettors, Fuel Pumps and Spares. This comes up a lot, and there never many pictures and then people thing they will kill their car with too much oil. So video insted. 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. The fuel bowl housing the fuel float and fuel flow regulating needle. In later S.U. models (HIF series) this is integral with the carbie body. The piston (air valve) which includes the fuel metering needle and dash pot. The piston (suction or bell) chamber containing the piston, piston spring and damper. 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. 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. 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.