Glenn wrote:RCR#10, 3 in favor, 5 against: Personally I think the idea of allowing aftermarket rear upper links makes sense for the Fords. Weâ€™re fighting both parts availability and ripped up pickup points, both of which can be helped with aftermarket arms of a specified length and with spherical bearing/rod ends instead of rubber or urethane. Opinions differed though, and for now I am happy to go with the majority.
I would like to see a responce from those who voted no to this and explain why. I'm getting emails from my guys and I voted yes. So I can't answer as to why it wasn't passed other than "it didn't get enough votes.."
Alot of the failure in the upper mounts (the ones we passed the repair kit for) is related to the twist placed on the mount due to the bind of the rubber bushing. The more you deviate from straight, the more resistance the bushing provides. I rodend here would allow movement w/ no twist type bind on the mount.
OK, I'll bite.
Not being a Ford expert, I based my no vote on cost, common sense physics and info from a Ford expert. If a beefier arm is allowed, the failure point is now the body/mounting point/sheetmetal. Carrying a spare arm in the trailer is a much easier/cheaper fix on race weekend if one fails. Having to weld up/repair the torn body mount will probably end your weekend. Not to mention the additional time/money required to repair it. and there's no guarantee that the aftermarket arm won't break either.
The Ford expert I heard from said this:
1. Like it or not, control arms (front and rear) are consumable items. Certainly not like brake pads, but they are an item to inspect regularly, and replace when they show significant signs of wear.
2. On a Ford, from my own experience, for the rear uppers, you do NOT want an aftermarket, super strong arm when using the standard, factory 4 link setup. Some flex is needed.
3. Going to a different, stronger, aftermarket control arm WILL effect handling.
4. From my own experience - I never went to a poor mans 3 link as I felt the trade-offs were too much. A Mustang wasn't designed to operate that way, so it does indeed impart a tremendous amount of stress on ONE suspension point when it should be two. Additionally, it's a CHOICE to run a PM3L, so the racer has to accept the consequences of that choice. I ran the standard 4 link for eleven years, and replaced my rear uppers 3 times in that period. When they got worn (bushings worn out, elongated mounting holes, etc), they got replaced. At a cost of approximately $40, per set. I always bought decent used arms with used bushings to keep the compliance in the rear.
Based on the above info, cost consideration and common sense physics, I voted no.