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Henry Schmidt Henry Schmidt is offline
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Join Date: Apr 2004
Location: Fallbrook, Ca. 92028
Posts: 6,004
As with all other modifications we choose to explore, we thought of that and did some research. What we found was that the difference in the expansion coefficient is very little.
It is almost impossible for us to calculate the true expansion coefficient of the magnesium because we don't know the alloy mix but pure magnesium is around 26.1 x 10-6/K and we know it's an alloy so the EC should be lower. The Expansion Coefficient of aluminum is 20.4-25.0 x 10-6/K depending on alloy mix. As you can see it's very close so it should and has had no noticeable effect.
As for glue: not being adhesive engineers we thought it prudent to seek the help of one. We called E. V. Roberts, an aerospace composites company, and got some advise. Their engineer recommended an adhesive that they use to bond carbon fiber to aluminum. Two completely different materials with two completely different ECs. That is the adhesive we chose.
At this time we have this modification in three engines [one a 2.0 race engine] now for over two years.
Henry Schmidt
Ph: 760-728-3062
Old 09-30-2005, 09:49 AM
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