If you are going for fast road use, then you need to consider deeper elements. The connecting rod which links the two jet levers together must be adjusted so that both jets are lowered simultaneously the same distance. After 13 years of testing and use, and hundreds of kits sold and installed in various cars all over the world, our Mikuni HSR carb kits have been a great success - proven with each installation to be superior in power, throttle response, fuel economy and reliability. The result was a year of searching and testing that lead to the conclusion that the Mikuni HSR carbs were clearly the best option. Do this on both carbs, as one may be sticking open! The problem This season, our modified cc A-H Sprite engine in the Austin A40 would very occasionally backfire through the carburetor at highway speeds under light load.
SU Carb (very) Fine Tuning
But the car runs smoothly and well at all other speeds and loads. The first thing to do is not set up the idle speed, but to set the idle mixture screw to lean best idle setting. Revolve the distributor slowly in a clockwise direction until the engine starts to buck. Also, try and avoid mixing the parts. Units in service over 60 days may be assessed a service fee. Nevertheless, that is the best way to go and in the long run it may be the cheapest. The shoulder of the needle can always be seen on the underside of the air piston.
Tuning SU Carbs | MG Midget and Sprite Technical | restaurantesgirona.info
A skilled tuning expert can probably profile the needles to suit individual engines. This is the number to adjust. I know from experience that the symptoms indicate an excessively lean fuel mixture that means not enough gasoline in the air stream. But all that original goodness was created by many hours of testing in engine research labs and field testing by skilled technicians. Mixture strength is determined in part by the amount of air passing over the jet opening, and this airflow is determined by the throttle setting, so it should be obvious that the throttles must be synchronized before the mixture can be adjusted. He soon teamed with his brother, Thomas Carlyle Skinner to produce a working model.
The purpose of the damper is to slow down the rise of the piston when the throttle is opened suddenly. If it is for looks then buy some nice shiny pancake filters. Since the original SU and ZS carbs that they are replacing are the same, regardless of the car make, the same basic kits can be used for installations on a variety of different cars with some changes in jetting and throttle linkage. If the carb is out of the warranty period and no defect is determined we will estimate the possible cost of tech support or recommend literature available that may help. Upgrades4MGs Get more from your B These are the best flowing manifolds available, but usually need some casting cleanup.