I have been looking over the rules and prior debates about this issue. I have read that they are illegal but I may be reading into the rules a little too much. I have found that king motorsports sells their motor mounts as suspension bushings, as does inlinefour.com for ES motor mount bushings.

Under the ruling 17.8.B the rule states:
Suspension bushings may be replaced with bushings of any material (except metal) as long as they fit in the original location.

If these places are considering the motor mounts to be suspension bushings I don't see a reason why they couldn't be considered legal under this belief.

 

Unless you're engine is a stessed component of the chassis (as is the case with many formula cars and sports-racers), I fail to see how your interpretation could hold up under protest. The engine mounts have nothing to do with the car's suspension - they do not define geometry, control travel, etc.

Under your logic, if King were to start calling Mugen crate motors "stock motors" they would become legal replacements as well.

 

I agree with Monkey. If King sold a NOS kit with the suspension bushing kit, would that make it legal?

 

thats why i was asking for some opinions. I wasn't stating it should be legal just because they sell it that way but i didn't know if others considered it to be that way too.

edit: I do think there must be some reason they sell it that way though. I seriously doubt they just randomly place it with suspension for no reason, but i'm no engineer to know what effects what part of the car exactly.


[Modified by ryan12321, 5:05 PM 2/28/2003]

 

stock motor mounts and that's it. no other mounts are allowed. i would be careful about buying aftermarket factory motor mounts too.

something i've "heard" that the stock class guys do is buy another set of mounts and then put them in their kitchen oven. cook em longer they get harder. of course, they also fail quicker..... i don't condone doing this either.

nate

edit: the _car_ manufacturer has to define an engine mount bushing as a suspension bushing before this "loop-hole" would work.


[Modified by solo-x, 10:06 PM 2/28/2003]

 

Mostly because all the bits are polyurethane and "stiffen up the car". It's just marketing.