Visit The Dirt Forum for More Information

Author Topic:   iron or aluminum heads
leftturn73
Member
posted September 09, 2003 12:49 PM
Other then a wieght savings is there any great advantage going with a set of aluminum heads over cast iron heads? I run different tracks some UMP and thought I would build a motor with aluminum heads. Any thoughts????


xx RACER 96
Member
posted September 09, 2003 01:39 PM
Aluminum is easier to repair, and you can easily find aluminum heads from a manufacturer that are better performing than most cast iron models (that's where the money is for them).
Theoretically, because of the differences in heat retention between cast iron and aluminum, cast iron actually has more power potential. However, nobody seems to think the potential is greater than the weight savings.


leftturn73
Member
posted September 09, 2003 02:23 PM
Would an aluminum headed motor work best with gas or alcohol or does it matter??

Thoughts

xx RACER 96
Member
posted September 10, 2003 01:15 AM
quote:
Originally posted by leftturn73:
Would an aluminum headed motor work best with gas or alcohol or does it matter??

Thoughts


Because aluminum dissapates heat quicker than castiron you will need to run about 3/4 of a point more compression to result in similar combustion. You can put a thermal barrier coating in the chamber to help retain the heat, but it is really not something to be concerned about unless you are limited on your compression. Either material will run great with gas or alcohol.

Back to the Archives