Saturday, October 12, 2013
What Is the Difference Between a D16Z6 a D16Y8 Head
The types of engines found in different cars from the same company can be different due to design changes and power differences. In some cases, these variations result in parts with slightly different capabilities that are interchangeable between one engine and another. For instance, with some Honda engines, the heads in the engine carry different part numbers with slightly different functions that can fit into more than one type of engine, such as the D16Z6 and the D16Y8 engine heads.
Compression
One of the biggest differences between the D16Z6 and the D16Y8 is the compression that each head creates within the engine. The compression has a direct impact on the performance of the vehicle. The D16Z6 has a slightly lower compression ratio of 9.2 to 1 versus the compression ratio of 9.6 to 1 in the D16Y8 head. This means that the D16Y8 head provides slightly better performance than the D16Z6, though the difference is not significant.
Power
Because of the increased compression ratio of the D16Y8 over the D16Z6, a vehicle operating with the D16Y8 heads will achieve a higher horsepower rating than one running with the D16Z6 heads. Just as with the compression rate, though, the difference is not significant, making the two parts easily interchangeable. The D16Y8 achieves a horsepower rating of 127, while the D16Z6 achieves a horsepower rating of just 125, which doesnt make much difference to an untrained driver.
Torque
The amount of torque an engine provides directly relates to the acceleration speed of which the vehicle is capable. The amount of torque provided by the D16Z6 and the D16Y8 head within a Honda engine also varies slightly, providing a difference in performance for your vehicle. The D16Y8 provides the engine with 111 foot pounds of torque, while the D16Z6 provides only 106 foot pounds of torque. Thus an engine using the D16Y8 can accelerate a little faster than one that uses D16Z6 heads.
Redline Rate
The rate at which the engine hits the red line, or the maximum revolutions per minute, can vary depending on if you use the D16Y8 or D16Z6 heads. The D16Y8 head redlines the engine around 6,900 rpm, while the D16Z6 redlines around 7,200 rpm. This means that the D16Y8 will hit its maximum rpm more quickly and thus will rev more frequently than using the D16Z6 heads. The torque and the RPMs are directly related. The higher the torque, the lower the rpm.
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