You're talking about the welds themselves so i will address that instead of 6061, since any loss in strength will be insignificant. 4043 filler, in able to be called 4043 has to be of the same chemical properties as solid 4043. It will not be 83% weaker than the 6061.
For the record however, a steel bar would be more ideal imo. The weight savings would be only a couple pounds, which is insignificant when looking at weight reduction. Steel is stronger and more rigid. It's also cheaper material.
Last edited by powder; 01-26-2010 at 09:07 PM.
2004 Subaru WRX, Stage 2 - 13.93 @ 96mph Yes, it's still slow.
2001 Black ZX2
TheGhostInTheMachine: I have VTEC at 3800 rpm
powder: i have 15.5 psi at 2400 rpms
TheGhostInTheMachine: i have 15.5wtq @ 2400 rpm