![]() ![]() The heat is best blocked by a wood fiber laminate, then a plastic spacer and aluminum is not a good heat blocker, but is very durable. The effect of a spacer is not changed by the material. Which material to use depends on the heat transfer and durability. We do not recommend the use of open spacers on dual-plane intakes. If you need more air/plenum intake in your performance motor you can achieve this by using a thick open spacer. The open spacers are used on single plane intakes only. You provide extra plenum intake volume, which gives you better performance in the high revs and thus increases the power band in higher rpm’s. By applying a divided wall you get the opposite result. By installing a 4-hole, the low rev response will improve and the powerband will go towards the lower rpm’s. For a street performance engine with a dual-plane intake, the 4-hole or divided wall can be used. The most common spacers are 4-hole, divided wall, and open spacers. With the help of a spacer, you can certainly improve your performance goal. I want to adjust the powerband of my engine, which spacer should I use? These are available in different types, but the best heat blocker is the 4-hole variant. If the heat problem is more persistent, a spacer of wood fiber laminate or plastic should be used. ![]() The insulators come with longer studs and are made of gasket material, so no extra gaskets needed to install. The heat insulator is a thick rubber gasket to prevent heat transfer towards the carburetor. If there is still a heat problem, a heat insulator or spacer can be the solution. Is your fuel boiling in the carburetor (Vapor Lock) or is it hard to restart the engine at operating temperature?įirst, check the operation of your cooling system and check if fuel lines and components are too close to any heat source. The 2 main reasons are to adjust the power band of your engine or to prevent heat problems such as vapor lock. Which one you need depends on what you want to use it for. They are available in aluminum, wood fiber laminate, plastic, or rubber gasket material. The most common types of spacers are so-called 4-Hole, divided wall, or open Spacers. Spacers come in different designs and materials. Spacers and Heat Insulators: Which one do I need? ![]()
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