Originally Posted by
Z28ricer
got an S14 subframe from dan, and while browsing zilvia, saw mention of the mounting holes being spaced out different, and a company offering solid bushings with the holes offset to remedy this...
I've already decided I want poly subframe bushings, so I was looking around at 2 part polyurethanes to make your own bushings, decided to verify the mounting hole spacing issue, measure the S14 subframe bolt hole distance, crawl under my car with flashlight and tape measure in hand, measure and verify the difference, then see something at the rear bumper support, no way, hide-a-key, sure enough fits the door locks
The hole offset is 5mm per side, roughly. The S14 subframe is wider than the S13 one and only in the one dimension (extending from the centerline). You can actually read all of this in the FSM Body section.
The subframe locating pins/studs have a huge taper to them. You can actually get the S14 subframe to engage all 4 pins on the S13. Then just force the subframe on with a jack, which will compress the bushings inwards. Done, and it ain't going anywhere. You can follow up with some WindoWeld if you want to fill in the voids.
I did this years ago. Tons of people have used the same method in competition cars as well. Sounds hack, but it's proven. I refuse to spend a billion dollars on aluminum bushings that will make the car loud and crappy, as well.