Sunday, December 14, 2014

steering column and clutch design complete

I had a few options for steering column placement:

A) This is where other builders go.  This would be great, but my rack, header, and engine conspire to make me need 4 U-joints or a custom header.  Both options sounded bad, so I looked at some alternatives

B) Sneak through the pedal box and come through the firewall as shown.  Would be great and solves all my problems.  There just wasn't enough room.  I would have to modify a bunch of nonsense with the pedals.

C) Chop off some of the extra meat on the clutch master cylinder.  This goes through some pretty important structure on the other side.  No good.

D)  The clutch master cylinder takes up a lot of real estate.  Why not get a more compact one and put the column here (where the master cylinder connections pass through the fire wall)?

E) Reroute the hood release and go above the clutch MC.  I held the column there and turned it.  It felt weird like it would almost bind.  I think u joints shouldn't go past 30° for steering.

I believe D is the right answer.  A side benefit is no longer needing the weird Ford quick connect and the weird clutch line made.  I decided to just see what a Wilwood MC goes for:


No brainer half the price of a single u joint, and about the same as an autozone kludge job.  The position of the column is so nice now, that I believe I can connect to the rack with one u joint.

This MC can be gotten in a couple bore sizes.  A larger bore will make a stiffer pedal, but more importantly will move the slave further per inch of pedal deflection.   A quick search on the Google suggests about 1.25 inch stroke is needed on the T5 transmission.  

The Wilwood cylinders are 1.4 inch stroke, so I will assume that I should shoot for a similar slave and master bore size.  I measured the slave at .75 inches, so I bought the same for the master.

I also ordered a clutch hose from Autozone.  This is so I can avoid a rigid connection between the transmission and the chassis, and so I can avoid having my hard lines in an area where I am swinging the transmission around during install.  Since I am now 3/8 - 24 thread everywhere, Autozone PN 88257 will work ($10).  




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