I've been reading up in the 20b section to better acquaint myself with the process of going 20b and came up with a few items that don't seem to have answers yet. I know that a proper EMS, mounts and radiator/e-fan are necessary, but there seems to be a few holes in the FAQs

First off, I know that one would use all of the 20b accessories, with exception to the water pump (swappable to a TII one). What about the A/C compressor? Also, to keep A/C in the car, how much R12 refrigerant would it take?

Next, where might I obtain a 20b stock twins downpipe flange?

 

just use the t2 front cover and your ac/ps problems are solved, then if im not mistaken you need custom lines made since the front of the engine will be moved forward

 

yeah you just bolt the FC ac/ps bracket on the engine. you may be able to get away with the stock FC lines, but the 20b moves forward...

also the PS pump might have trouble with the hood...

we had the flanges made. the 20b is weird, it has a little cast iron pipe from the turbo to kinda where the precat would be on an NA fc.

we made THAT one.

 

A/C capacity has nothing to do with the 20b. As long as your re-using the complete a/c components that came with the car, the capacity will be on one of the labels on the hood.

 

I removed power steering because i didnt care for it but i did keep my a/c and all i did was re-route the A/C lines which was a pita! everything else stays the same.