I'm about to start the process of mounting a 20B into my FD.
Have yet to get a certifier on board, but thought the internet would have all the answers anyway ('cause we all know that if it's on the internet, it's gospel).
Anywho, what are the rules around modifying the factory subframe, specifically where the steering rack mounts to the subframe?
The mounting points for the rack are at the front of the subframe protruding forward.
Xcessive Manufacturing in the States does this kit: https://xcessivemanufacturing.com/mazda/20b/mazda-20b-m-20b-fd-xmm-k.html
Kit is for LHD cars so can't be used here.
Essentially I want to do the same, but rather than cut out the subframe and weld in new parts, the plan is to:
Cut the stock subframe either side of the mounting brackets
Bend the front of the subframe down which will rotate the rack downwards.
Reweld the subframe
Notch the subframe slightly to clear the steering shaft.
This effectively drops the height of the steering rack.
The below pic shows what I want to achieve - see the nearest edge of each subframe with the rack mounts:
Top subframe is an aftermarket option, bottom is the stock subframe.
The second aspect to this, is the bump steer issue caused by dropping the rack.
Most kits out of the states use 'bump steer adapters' which is just an adjustable rod that spaces down the tie rod end - is this legal in nz?
Both of the above things have been done in circuit cars, but unsure of legality for nz roads.
The other option is to build a custom subframe, however, I'm trying to limit costs.
All of this is to get the motor as low as possible in the chassis, and maintain the factory bonnet.
Already cutting 40mm out of the intake manifold, however need atleast another 30mm to make it fit.