raceteam44 0 Report post Posted January 7, 2014 IMCA upper control, what is the difference between aluminum and steel? What advantage dose one have over the other? Share this post Link to post Share on other sites
jwmbishop 0 Report post Posted January 7, 2014 Biggest advantage is that unsprung weight is lower - which makes the shock's work load lower and thus you have better response to shock tuning (and I have found smaller weight adjustments make bigger differences with lower UW). Share this post Link to post Share on other sites
poorboy 0 Report post Posted January 8, 2014 The only difference is the cross shaft, the rest of it is steel. I don't see much of a difference. Share this post Link to post Share on other sites
NickHolt 0 Report post Posted January 8, 2014 Have to agree with poorboy on this one if it's just the cross shaft that's aluminum. Nick Share this post Link to post Share on other sites
fastman 0 Report post Posted January 8, 2014 Nick, would the cross shaft be considered sprung or unsprung weight since its not a moving part and bolted to the frame. Share this post Link to post Share on other sites
Wayne Walker 0 Report post Posted January 8, 2014 Sprung Share this post Link to post Share on other sites
NickHolt 0 Report post Posted January 9, 2014 Sprung weight on the cross shaft. Now if the two sections of the actual a-arm were aluminum, I'd say they were an advantage over the steel arms since half their weight would be considered unsprung weight. Any time you can cut down on unsprung weight, you gain a handling advantage. Nick Share this post Link to post Share on other sites
raceteam44 0 Report post Posted January 18, 2014 Thanks for all the help. Share this post Link to post Share on other sites
