3B and AAN/ABYADU differences - need input

[UrS4boy]

I am going to do an info post soon that compares the 3B with the AAN/ABY/ADU triplets. To do this, I need to touch on all of the differences. I have limited exposure to 3Bs here in Canada (we didn't get any but the US did in 1991 200 20Vts - which I have seen), so I need input from S2 3B owners:

Off the top of my head, I *think* some of the differences include:

1. Single coil versus multiple coils
2. The way the MFTS works with the ECU
3. Hall sender in a dizzy versus Hall sender behind the exhaust cam sprocket (not withstanding the early "Tuna Can" AANs (to mid Feb. 92))
4. Oil pumps
5. ??
etc. etc.

Input invited (please).

[Jonas_R]

5 speed gearbox
Total weight is lower
Different control unit
Paper head gasket
Lower hp and torque. 220hp and 309nm
Different ecu
Only 200 kPa mapsensor
Different fuel lines return/feed under the car
Single mass flywheel
Headlights are the non elipsoid version
Fuel rail and fuel pressure regulator are different (3b only 3bar and aby 4bar)
Intake manifold is different

[Sleeper_Avant]

the way the ECU feeds air con and radio with engine/road speed signals (AAN atleast, cant verify for ADU/ABY/3b

harmonic dampers/crank pulleys

cam belt/waterpumps (obvious but dont know to what extent your going with this Dave )

Immobliser, country dependant ofcourse

Oil sumps?

all i can think of for now

[Sleeper_Avant]

oh and AAN throttle bodie has a longer edge where hose pushes on (Rusty pointed out in a Wanted post )

[LHD_Kid]

Exhaust is different 3b/ABY, although not really engine difference...
IM different

[david]

airbox
maf?
intercooler
battery(located in engine compartment)
(body) shorter than aby?

[SteveH]

The 3b front floorpan is different
Battery is in the engine compartment on the 3B
Servotronic steering rack and controller

lots more if you want to go into greater detail....

[aronmatic2]

i think can be easyer to list, what is the same, almost everything is different.

[UrS4boy]

Thanks to those who participated. The comparision post will just be about the engine, not the difference between the B3 Chassis S2s with 3Bs and the B4 Chassis S2s with the ABY engine.

[newsh]

Different IM means different charge pipe.
Intercooler is smaller.
Paper head gasket.
Cam cover
PCV pipes.

[rs200]

i think can be easyer to list, what is the same, almost everything is different.

LOL....

start the new list, it will be easyer !

[Error404]

I think the only thing that is the same is the crank, sump and the exhaust cam?

[fish]

Battery under hood is RHD specific. LHD 3B,s have the battery under threar seat, same as ABY LHD. Other differences that i don´t see posted are the cambelt cover, injectors, isn´t the alternator different aswel or am i dreaming that?

[UrS4boy]

I think the only thing that is the same is the crank, sump and the exhaust cam?

There is more than just those that are common.

[UrS4boy]

I think the only thing that is the same is the crank, sump and the exhaust cam?

Won't you be surprised! (still a work in progress)