Drive Train

ENGINE Reversing Gearbox DIFFERENTIAL
     

 

 

 

Drive Train Summary:

230 HP Hayabusa engine, mounted longitudinally, driving a solid mounted differential via a Quaife reversing gearbox between two drive shafts with a CV joint on each end. 

The start of a custom header.

This is where the sprocket would typically go.

This CV joint flange was made by Mike Downs of Downs Engineering.  I could not make it myself because of the splines.  The bolt circle is 80 mm which was the same as the 94 mm CV joint from Taylor Engineering.

This is the CV joint from Taylor Race Engineering.  It has a stub shaft to make welding a drive shaft easy.  I am using 4 of these.

I machined a spacer, as the nut extends out of the face of the flange.

The Quiafe reversing box has what they call a Ford English flange.  I believe it was made to bolt directly to the English version of the Ford XR4Ti differential that I am using, the Ford Sierra.  I wanted to mount CV joints to the gearbox.  I could have mounted it to the diff and used one drive shaft, but splitting the drive shaft also increases the critical speed of the drive shaft, which is good considering that it will spin up to 12,000 RPM and will be next to my legs.  The English flange pattern is a 70 mm bolt circle, divided by 100 degrees and 80 degrees.  This is most likely so that it fits between a 6 hole bolt pattern with 60 degree separation.

These are the adapters I made out of 1/2 inch thick steel discs, as they will be transmitting 230 hp.  The 4 hole pattern is countersunk but not enough to cover the entire head of the bolt.  I have spacers for that below.

There is a pilot lip on the inside face to center it in the flange on the gearbox.

I also ground the bolts down to reduce the spacer height requirement.

They sit just below the 1/8" thick aluminum spacer.

All of the machined parts for the drive shaft.  The two pieces standing on edge are parts of the CV joints that I machined down to remove 6 oz or rotating mass.

Is this a thing of beauty or what?

This is the differential flange.  Two of the holes in the 4 bolt pattern get in the way of the 6 bolt pattern.

I machined plugs for two of them that I will weld in and then drill and tap with the hole pattern below.

Wheel nuts.

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