Norm Peterson
corner barstool sitter
Seems I snuck a little last minute editing in after you posted.Thanks for the response
Norm
Seems I snuck a little last minute editing in after you posted.Thanks for the response
Apparently a link to this has appeared on the SEB forum and now they are complaining on Facebook. Yay.
guys, lets debate the topic all we want, however, please try to keep personal attacks out.
Thanks
Terry,
What are those two nuts and threaded ends on the diff cover with the watts link?
"Methods of attachment and attachment points are unrestricted, but may serve no other purpose (e.g. chassis stiffening)"

Mark, I thought you were only there for the second call, not the SPAC or the first SEB call. Correct me if I'm wrong.
Wow, really?
Based on this "clarification," the Whiteline unit should be allowed, since changing a differential cover does nothing as far as performance is concerned and the Fays2 unit should be disallowed SINCE IT STIFFENS THE CHASSIS.
Congratulations! You just made Terry's point for him. Bravo.![]()
wondering if there's another way you could create a chassis side mount of a Watts propeller that would introduce significantly less chassis stiffness than the Fays method.
I believe that the majority of our rules are solid
Second, I'm curious why Whiteline would go to the trouble and expense of adding bearing preload and cooler abilities to their cover if that didn't serve any purpose. Usually businesses are more rational than that.
Mark
With the bearing preload and cooler eliminated, the diff cover truly serves no other purpose. I do not understand how it could be interpreted any differently.The bearing preload bolts are to support the differential bearings under heaving loads, such as those found in an autox. They add no performance benefit; they simply improve the longevity of the differential.
And have you LOOKED at a Fay2 unit? The frame that the propeller is supported on is beefier than most subframe connectors.
Our point is that if you are outlawing the differential-mounted units because of how they are mounted, the Fays2 and Steeda units should be outlawed, as well.
So what you're saying is that the Fays2 frame does indeed stiffen the chassis, and based upon your quoted rule, is ILLEGAL.
Mark, I agree, no one would add those features if there was no benefit. I understand that those features fall under "serves no other purpose" part of the rule. But if the bearing pre load bolts are left out and plugged as well as any cooler lines are not used then the only benefit to the (for the sake of this conversation) Whiteline diff cover, is a convenient, strong, and safe mount for a watts link.
For any organization to say mounting is free as long as they serve no other benefit and then to clarify that rule by outlawing what I believe is the simplest way to do it is strange to say the least.With the bearing preload and cooler eliminated, the diff cover truly serves no other purpose. I do not understand how it could be interpreted any differently.
The rule doesn't say "performance benefit". It says "other purpose". And I completely agree with you that the stated goal of those covers is to better support differential bearings. To me, that sure sounds like "another purpose".
Mark - it seems to me that actual use of the WL cover bearing preload and cooling features could be readily verified to be unavailable or disabled, similar to (I think) the disabling of certain OE aero features that appears elsewhere in the rules.
After that, it really is just an allowed attachment for an allowed lateral locating device for a stick axle.
Norm
You might not be able to make it as light (or as stiff. Or with the same heat passing characteristics. Or some other thing I'm not thinking of) as a replacement cover though. And there's your "other purpose".
And all of that is why I personally would choose to fabricate a propeller bracket that mounted over the stock cover. I don't believe there's any question whatsoever that that's legal.
i wrote a letter in support of allowing all SP cars to change their diff covers.
i also have a letter in on the lca relocators axle side for SM as it says suspension is "unrestricted" as long as it uses the original mounting points. the rear axle should be considered "suspension" since it moves vertically as noted in the the rule book, so is it chassis mount or chassis and axle mounts? the IRS guys get to run extended ball joints that correct their geometry problems and this is the solid axle equivilent... this doesn not apply to SP cars as their suspension is not unrestricted. again, i have a letter in and to me its not legal until clarified, but whats your opinion Mark?