![]() Plates can be made of a variety of metals and we suggest you talk to a specialist about your options here.The decompression plates may fail prematurely in high boost applications where high temperatures are involved.Many view this as a good thing as replacing a decompression plate is a lot easier to do than replacing pistons and heads. The block side needs a conventional gasket seal but the head side generally only requires a nonsetting high-temperature sealant (in the case of aluminum decompression plates). Decompression plates are essentially an extension to the head and can be very effective at reducing the compression ratio.This is by far the easiest method of reducing compression but the risk is that you are more prone to head gasket failure and the gains in lower compression are minimal. ![]() We have also seen people using 2 gaskets (or more) to achieve a lower compression ratio! * Using multiple gaskets is certainly not recommended and introduces a major weak spot in an engine (see below).Ī thicker gasket will reduce the compression ratio by a small fraction, probably only by. This option is a bit of a bodge, but we should mention it as a lot of people do run thicker gaskets to achieve a lower compression ratio. Replacing the head with a different profile one can also reduce the compression ratio slightly. However, it requires great skill to do a proper job on the head and achieve the lower compression ratio you are seeking. Removing the head is relatively simple and does not require as much effort as other compression lowering mods.
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