AAN flywheel vs ABY/ADU flywheel

[Canadian RS2]

Is there any performance advantage going with the AAN flywheel in an RS2? I'd like to keep the DMF to maintain the smoothness and I understand that the AAN flywheel is thinner than the RS2 so I'd need to eliminate the spacer. Just wondering if there is a weight advantage with going with the AAN DMF.

There is definitely a cost savings by going with a AAN clutch compared to an RS2 clutch. I'm looking at installing a Southbend Stage 3 clutch since my input shaft seal has failed and coated everything in transmission fluid.

Dave

[caterpillar]

DMF are crap... go for the old 7a or MC1 / mc2 and have a nicer engine...

[Rusty]

3B is the best with Sachs Race Engineering 707 and depending on power levels, get the organic or sintered 4 puck friction plate.

7A and 3B can be lightened up to about the same level, my new one is ~8kg down from ~11kg (7A)

[Canadian RS2]

The 3B flywheel is just as hard to come by as an RS2 flywheel in North America. The 3B was only available in the 1991 Audi 100 and I don't believe that one was the same as the S2 3B.

I see the benefits of going to the 7A in certain conditions but I just figured living in a big city with stop and go traffic is more conducive to the DMF. I'd be happy if anyone can convince me otherwise. The 7A SMF is readily accessible over here.

Dave

[Jamo]

7a lightened is fine in traffic any SMF between 8-10kg is fine in that regards, it's when the go below 8kg with some 5-6kg they are a nightmare

[PRY4SNO]

I have a spare 7a FW if you're interested Dave. Shoot me an email or PM.

[macspring]

Is there any performance advantage going with the AAN flywheel in an RS2? I'd like to keep the DMF to maintain the smoothness and I understand that the AAN flywheel is thinner than the RS2 so I'd need to eliminate the spacer. Just wondering if there is a weight advantage with going with the AAN DMF.

There is definitely a cost savings by going with a AAN clutch compared to an RS2 clutch. I'm looking at installing a Southbend Stage 3 clutch since my input shaft seal has failed and coated everything in transmission fluid.

Dave

Depending on the age / condition of your AAN DMF, and the power you intend for the engine, I'd keep the AAN flywheel and a matching oem spec Sachs clutch, as it will drive like the factory intended, smooth and not a pain and effort to drive in daily stop start traffic. Just my tuppence.

I am assuming not more than chipped RS2 power, and no tracking or dropped clutch starts.

Have a SMF on my S2 and don't like it, my three urS6 manuals are super smooth and less effort to drive. Empirical evidence to support my opinion.

Maybe I'm getting older, and more sensible.

[momento1]

ive been considering the same thing on mine.
to go to a 7A FW from an ABY is a decent drop in weight

but there shouldnt be any side effects on balance of the engine surely as its not a massive difference...true??

it is a direct bolt on swap between 7A and ABY isnt it?

[Rusty]

Read my guide on the conversion

Ideally you'd have the flywheel matched to the one that comes out the car. Mines had a vibration at 1400rpm but I don't know if that's just the SM FW or a balance issue.

Loved my swap, made the car more responsive.

[europeanme]

if its any consolation I'm still running a DMF with my Sachs clutch....I to didn't want the hassle of stop start traffic.....

[_ShurikeN]

If the choice is between DM options only, there is an assumption that ABY/ADU clutch is stronger than AAN one. And smoother, because ABY/ADU unit has dampering in both flywheel and clutch disk.

[Vorsprung durch Technik]

If the choice is between DM options only, there is an assumption that ABY/ADU clutch is stronger than AAN one. And smoother, because ABY/ADU unit has dampering in both flywheel and clutch disk.

That's very interesting, can anyone else confirm this? For us S6 AAN guys.

[diesel des]

I have a sachs racing pressure plate for an aby if anyone is interested. Brand new. Sent in error as I need a 3b one.

Sent from my GT-N7105 using Tapatalk

[Canadian RS2]

That's very interesting, can anyone else confirm this? For us S6 AAN guys.

I'd be interested in hearing if this can be confirmed as well. I haven't been able to find much information comparing the ADU to the AAN flywheel.

Anyone know why one is thicker than the other?

I really don't want to switch to the SMF.

Dave

[_ShurikeN]

Anyone know why one is thicker than the other?

AAN flywheel if 'flat' design and ADU is 'deepening/bowl' design.

ADU pressure plate is equal to UrS4/6 V8 plate.