I had a shaft made for a CA18DET box to Borg Wargner diff I used a drive shaft company to make mine based on measurements I took (flange to flange/inlet). They used the yoke off the original S13 tail shaft which I took from the donor car and made the rest to suit. Being a Borg Warner diff it was easy to get new parts as it is same as Commodore, if you are using the standard 1200 diff you may have to use the old diff flange as well. I had a thick wall shaft made to handle high HP, it was only 1100mm or 1000mm long from memory and had all new unis etc. I paid $600 for that shaft and it was ready in about 2 days.
Hi CADET1200 Yeah it is for track. The increase from the S13 conversion is OK but he needs to confirm the stock offset to determine the source of the increase. In this case it’s to do with the hub location changing but the load on the hub isn’t changed so it’s ok, but he needs to have the offset substantiated to pass it. Everything else is ok, getting ready for final inspection!!
Does anyone know of where I might be able to find a published spec on the standard rims? I need to confirm the standard offset for Engineering purposes, so it has to be in a workshop manual or published document of some sort.
I have a few manuals, but they don't specify offset.
I can just source a stock rim so the Engineer can measure it, but it would be easier if I could find it on paper somewhere first. That might be my next post...
Maybe check the discharge pressure with a gauge. It might be passing on the inlet check valve when pressure is applied on the discharge stroke of the diaphragm.