Carburettor throttle slide material

In summary, the conversation is about re-engineering a carburettor design, specifically the throttle slide, due to stress raiser flaws. The prototype slides were printed in ABS for fitment trials and Acetal was used for functional trials. The requirements for the new material include being able to withstand petrol, ethanol, methanol, LPG, high heat, wear, impact, and requiring a high surface finish. The speaker mentions LG2 as a potential material and asks for any alternatives or reasons why not to use it.
  • #1
needing
6
0
Hi.
I am re-engineering a 40+ year old carburettor design. The current throttle slide has stress raiser flaws and is the same material as the mixing chamber that it slide interfaces with. The prototype slides were printed in ABS for fitment trials. The functional trials used Acetal allowing for slide expansion to operating temperature.
Requirements:
I envisage a material that copes with:
1. Petrol, Ethanol, Methanol, LPG
2. Heat - residual heat soak with engine switched off more so than in operation
3. Wear - the mixing chamber is zinc alloy so the slide should be the sacrifical element
4. Impact - the slide is subject to single manifold pulses of 20 inHg to zero at idle as well as dealing with spring loaded slide snap-shut at deceleration.
5. High surface finish esp. for an internal piston bore as well as external sealing.
Any ideas?
Ta.
Owen.
 
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  • #2
Hi All.
So far, LG2 for consideration?
Any alternatives to...? Any reasons why not...?
Ta.
Owen.
 

Related to Carburettor throttle slide material

1. What is the purpose of the carburetor throttle slide?

The carburetor throttle slide is a component that controls the amount of air and fuel mixture entering the engine, thus regulating the engine's speed and power output.

2. What is the most common material used for carburetor throttle slides?

The most commonly used material for carburetor throttle slides is aluminum. It is lightweight, corrosion-resistant, and can withstand high temperatures and pressures.

3. Can the material of the carburetor throttle slide affect engine performance?

Yes, the material of the carburetor throttle slide can affect engine performance. Different materials have different levels of durability, heat resistance, and weight, which can impact the efficiency and responsiveness of the engine.

4. How often should the carburetor throttle slide be replaced?

The carburetor throttle slide should be replaced when it shows signs of wear and tear, such as warping, cracks, or excessive wear on the contact points. It is recommended to inspect and replace the throttle slide during routine carburetor maintenance.

5. Can I upgrade the carburetor throttle slide material for better performance?

Yes, it is possible to upgrade the carburetor throttle slide material for better performance. However, it is important to make sure that the new material is compatible with the carburetor and does not negatively affect other components of the engine's fuel system.

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