Exhaust Risers

Made of stainless steel to resist salt corrosion

Exhaust Risers

Made of stainless steel to resist salt corrosion
Riser di Scarico | SAITO

Particularly when the inboard marine engine is close to the waterline, it is often necessary to include the so-called “exhaust riser”, a component connected directly to the exhaust manifold. Normally the riser has an external over-wrap where the water that surrounds the exhaust gas pipe circulates, guaranteeing the cooling of the entire circumference of the pipe itself. The exhaust riser of a marine engine aims to guartantee the collection, the mixing and the engine cooling water and fuel gas expulsion.

Exhaust manifolds and risers are therefore essential components for the correct operation of the direct or indirect cooling system of the inboard marine engine.

For all the most common inboard marine engines – Volvo Penta, Yanmar, Iveco Aifo, Mercury Mercuiser just to name a few – SAITO, through its commercial partner SAILOG, sells exhaust manifolds and risers, pipe elbows, bends, dual chamber exhausts and heating exchangers all of them made of stainless steel for deep

Vintage Turbocharger (Classic Car)

Analysis of the causes of breakage and estimates for the repair of turbochargers of vintage cars

The turbochargers for vintage cars are only apparently the same as the current ones but in the reality it is not so. They are more “sensitive” and overall less reliable because the materials used in the past were less efficient. As well as the production and the assembly technologies were less refined. The turbochargers were also used on less “intelligent” engines, there was less control of the combustion parameters which made them less stable the exhaust gas conditions.

All this to say, before defining whether a turbo can be remanufactured, it is good to view it and decide how to proceed and whether it is really worth it. Remanufacturing a vintage turbo can cost approximately from € 250 to € 600 with more or less optimal results depending on the level of action taken. Sometimes a cracked turbine housing can be restored but the work will be more expensive and the result not totally reliable.

In questa sezione troverete giacenze di magazzino offerte ad un prezzo eccezionale: turbocompressori nuovi originali, complementi d’applicazione, motori, parti motore e tanto altro ancora!

Forged Compressor Wheels

Improved performance and reliability compared to normal impellers

The need to get more power and torque from the engine makes it necessary to use turbochargers capable of working at higher compression ratios (up to 5:1), higher rotational speeds and high derived temperatures due to the effect of increased air compression. When the turbocharger is used in heavy duty applications – such as city buses, trucks for local deliveries, earth moving machines, sports cars and so on – it’s speed has great variations this strongly stresses the Turbocharger’s internal components, including the Compressor Wheel.

Due to the increased performance of both engines and turbochargers, Standard die-casted compressor wheels has reached the limit of their resistance and so – in order to increase Turbocharger reliability – a new production method has been developed, namely for mechanical processing, from the a special Aluminum bar. The standard molded Compressor Wheel shows failure problems due to stress and often due to fusion defects, to oxides or other impurities

Wastegate Valves / Actuators

Allows turbochargers to run fast at low speeds, stabilizing the boost pressure

The waste gate valve was created to make the turbo run faster at low revs with a small size turbine housing, without reaching too high pressures at high rpm. In fact, a small turbine housing allows the turbo to spin sharply from the lower engine revs. Obviously when the engine expels a considerable amount of gas at the top, the narrow turbine housing becomes a bottleneck that prevents the engine from going up and down and at the same time, it makes the shaft wheel to rotate too hard. The problem is solved by providing the turbine housing with the waste gate valve, controlled by an actuator. The actuator feels the supercharging pressure through a tube connected to the compressor housing and it moves the waste gate plate opening an air inlet before the compressor wheel.

The gases and the power generated are sent directly to the evacuation so they are not released to the

Marine Turbochargers

Made with noble materials to cope with marine corrosion
When you are on the sea, you have to be in total safety! The marine turbocharger is subject to a different wear from industrial or automotive type. In particular, marine corrosion causes erosion of the metallic components of the turbine housing, with a consequent increase of the space along the compressor wheel of the marine turbocharger. Not to mention the wear caused by the working condition of the marine turbochargers. It works in constant pressure and with the engine constantly under stress - like if you always go uphill on the road - which contributes to greater stress and wear. It produces a reduced reactive time to the power demand, with the following effects: glide delay with repeated attack / detachment of the volumetric compressors, increase of the smoke level. For the above mentioned reasons, SAITO suggests to use new and genuine (original) turbochargers made with noble materials designed to withstand the aforementioned wear conditions. Please contact our sales offices for any kind of advice regarding the purchase of new turbochargers for the most in-use marine engines, like: CATERPILLAR, DETROIT DIESEL, GUASCOR, IVECO AIFO, MAN, MERCRUISER MERCURY MARINE, SCANIA, STEYR, VM MOTORI, VOLVO PENTA, YANMAR, CUMMIN [...]

Cartridges (Coreassy)

When quality really makes the difference!

The complete central body, also called “cartridge” or “coreassy” represents the central unit of the turbocharger. It is the moving part where the components interact dynamically taking energy from the exhaust gases and then transforming them into a rotation movement which will be used to suck and compress air inside the engine. All that increase the capacity of the power engine. Apparently, it seems a simple component but in the reality, it is incredibly sophisticated and complex. The most important features of a cartridge are those that can not be correctly perceived and evaluated by eye. The most important are the quality of the work surfaces, the materials, the construction and heat treatments tolerances. Until the cartridges were only original (genuine) there was no doubt about their quality but today there are many non-original products in the market whose quality is often unknown. The cartridges of the present-day turbochargers seem equal to those of the

Turbochargers

One of the most brilliant inventions in the motoring field!

The turbocharger is one of the most ingenious inventions in the automotive industry, able to harness a large quantity of energy that otherwise would be dissipated without any advantages. The heat engines (thermal engines) fascinate the man thanks to their powerful expression of energy but unfortunately take advantage of a small percentage converted into mechanical movement, while a considerable amount of thermal and kinetic energy is released into the environment without producing any type of useful work. The turbocharger placement in the exhaust system allows to recover a good part of the energy contained in the gases expelled following the explosion. This energy is then used to rotate the shaft wheel fitted with the compressor wheel which is able to suck air from the environment and to compress it inside the powder chamber. The increase of the air mass and therefore of the oxygen allows to burn a higher quantity of fuel which permit to

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