manual shifting query

[beeno]

Can the shift fork pass through the firewall by using rubber bellows to seal the opening?
We are using manual shifting.

[Owen Thomas]

From the 2013 rule book:
"T4.5.4 Pass-throughs for wiring, cables, etc. are allowable if grommets are used to seal the pass-throughs. Also, multiple panels may be used to form the firewall but must be sealed at the joints."

[Khanjee]

the rule indicates the use of grommets but what about rubber bellows? since the shifting rod has to travel about 3-4 inches, a grommet would not be applicable here.

[onemaniac]

Not too sure what you're trying to achieve but one of the the easiest ways to install a manual shifter is using a push-pull cable like this:



You can use a grommet (or other sealing method) around it no problem.

[Jon Burford]

Originally posted by onemaniac:
Not too sure what you're trying to achieve but one of the the easiest ways to install a manual shifter is using a push-pull cable like this:

+1 for this
or contact the rules people of your chosen event to get a definitive answer on your grommet.

[Adambomb]

In past years we didn't even use bellows, but simply a couple of neatly trimmed rubber flaps. I think they were made from old tire inner tubes. IMO solid linkages are wayyyy better than push-pull cables.