4ag 16v to 20v interchangeable parts?

CheapFame
Club4AG Regular
Posts: 33
Joined: Tue Jan 22, 2013 3:37 pm
Location: SBC

4ag 16v to 20v interchangeable parts?

Postby CheapFame » Fri Feb 08, 2013 1:21 pm

Gonna be doing a 20v swap soon and I was wondering what parts off my 16v bluetop should I keep for the swap? The guy I'm getting the engine off of already has it in his ae86 so some stuff I will already have. I just want to know so I wont sell certain things if they'll work for my swap.

Army Fork
Club4AG Expert
Posts: 201
Joined: Mon Feb 04, 2013 10:34 pm

Re: 4ag 16v to 20v interchangeable parts?

Postby Army Fork » Fri Feb 08, 2013 9:34 pm

Alternator, Alternator bracket, motor mounts (suggest replacing those anyways, Megan makes some good ones), power steering pump and AC pump. You also need to grab the oil pressure sensor off the side of the block.

Since your dropping in a 20V, you'll also need to do something about the thermostat housing and distributor hitting the firewall. You can bash the wall, cut it, or drop the cash on a water kit (I recommend the S-86 kit) and a distributor relocation kit, or you can run a set of 4 COP's and rewire the system for wasted spark. If you're running a silvertop, you'll also have to modify the airbox to work in RWD configuration as it's current FWD design put's it's intake straight into the firewall, but with some tin and an experienced welder it's not that hard. For a blacktop, ditch the box and use either a monofilter or throttle body filters.

20V Swap:
http://sportstunned.blogspot.ca/2009/06 ... l-for.html

COP ignition:
viewtopic.php?f=13&t=206
http://web.archive.org/web/201205080108 ... d?id=18900

You'll also have to do some partial rewiring to the 20V harness to make it work, if I find that old thread I'll send it your way. Good luck with your swap, I'm personally in the middle of an ST swap and rebuild myself.
1984 SR5-GTS 20V ST/BT coupe.
- Stance GR+ Coilovers
- Mishimoto Cooling
- T3 adjustable 4-bar, Panhard, traction brackets, tension rods
- T3 Short shift
- Manual rack conversion
- Blacktop electronics

Army Fork
Club4AG Expert
Posts: 201
Joined: Mon Feb 04, 2013 10:34 pm

Re: 4ag 16v to 20v interchangeable parts?

Postby Army Fork » Fri Feb 08, 2013 9:37 pm

This is probably the most detailed swap guide you can get, read through it before you sell off that engine.

http://www.86garage.com/forums/viewtopi ... =24&t=5288
1984 SR5-GTS 20V ST/BT coupe.
- Stance GR+ Coilovers
- Mishimoto Cooling
- T3 adjustable 4-bar, Panhard, traction brackets, tension rods
- T3 Short shift
- Manual rack conversion
- Blacktop electronics