• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.

    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

TR4/4A Installing the fast ratio rack

mctriumph

Jedi Knight
Silver
Country flag
Offline
It became necessary to install the quick ratio rack in my Morgan after testing it on the road. (too many turns to steer it)
She has Tr4 front suspension from a 63 with the early style rack. The only rack I could find was from
BPNW for the later cars. What was the difference you might ask? Well the new rack had a welded bracket that
had to be ground off carefully so the clamp could fit onto the rack in THAT spot. Next the shoulder of the casting
where the pinion lives had to be dressed to clear the factory mount on the left side.
Then I addressed the weakness the early cars had in the mounts with a brace on the right side.From the top of the
mount ,straight over to the spring tower welded into place and painted chassis black. It was not practical to brace the left
due to the Tr4 steering joint on that side. However bracing up on one side looks to solve 90% of the flexing the early cars have.
(Lateral deflection in hard cornering). It feels great and now the 17inch steering wheel will not need so much cranking to go
around a corner.
Mad dog
 
Sounds perfect, and a good fix. I remember my early TR4 rack brackets bending like cheap sheet metal.
 
The wonder is that they didn't crack and fall off. They were sheet metal!
If you upgrade to a quick ratio rack, I recommend adding the lateral brace to the frame on the right side.
This will stop lateral deflection under load. Since the two brackets are solidly mounted to the rack,You only need
to brace one and both are solid.
Mad dog
 
Back
Top