Yes start a new thread about this as it will be great to get some more info on this and if we can solve this issue with some sort of modification !
I couldn’t find the thread you were talking about for the Flex Plate off the DL501 thread so i’ve posted some info here;
These are my findings after receiving from Germany two flex plates for comparison - One from a 2015 RS5 and the other from a 2016 RS6 / RS7.
In short I think the subtle concave, by 2mm, spline to crank mount, on the RS6 flex plate is where it’s stronger and IMO a RS6 flex plate would work on an RS5 but I’m a layman at this so please advise.
Both are 6 x nut inserts 9mm 1.25 thread clutch mount
Both have 12 outside holes
Both are 3mm plate thickness around these 12 holes
Both have identical 117 starter peaks on the outside edge.
Both have a Bench Height to bottom of the peaks from the top of the Spline of 39.5mm
Rs5 p/n 059105323BS Z1P2 2543
RS6 p/n 06E105323T T2P5 0753
Inner crank spline mount;
Rs5 105mm diameter
RS6 85mm diameter
Each have 10 crank holes around the Spline to Crank mount
Both have a Spline height from plate of 40mm
Spline mount height around crank bolt holes;
Plate around spline mount;
Rs5 - flat
RS6 - concave
Total height for both is 53mm from bench to top of spline ie the total width of the whole flex plate.
If your interested in more detailed pictures let me know and I will post.
This is the perfect place for it honestly. Thanks for posting up and doing research!
Ok now that I see the photos I can relate a bit more. So I’m guessing that despite the larger diameter of the inner spline interface with the rest of the clutch plate, the actual interface, where the bolts go through, is probably similar. That extra diameter on the RS5 clutch plate doesn’t really do anything for strength (guessing).
Is the center spline section just pressed in? It’s obviously three pieces (center spline, main disc, starter ring) so I’m guessing it’s just pressed/friction fit and not welded. Does the inner spline look like it’s two pieces? Maybe main crank bolt holding it together?
Just eyeing it up, the bolt hole location does look different though (radius). Looks like it’s further out from the main spline interface but maybe an optical illusion? Bolt holes the same size?
I’ll look up the part number for the S6, those are really common here in the states with the RS6 being non-existent as it wasn’t sold here. If the RS6 and S6 are the same part number, that’d be great.
The RS5 is the same part number as the A5.
Are there any manufacturer markings on it anywhere? If I know the manufacturer, I can try to source the starter ring.
WOW great info. Can we also start a separate thread on just this information. I really don’t think enough people know about this being an issue.
Great bit of info here ! There must be a solution to this, keep digging guys great work👍
Here is the answer. On the reverse side the spline is reinforced into the plate but the RS5s plate is pressed IMO.
First pic is the RS5’s flex plate, second is the RS6’s.
The height of the plates are identical. This is a pic of the flex plates side on edge to edge.
Not a great pic FYI sorry.
That flip side shot is telling. You can see they wanted to use the lightest version they had in their parts bin for the RS5.
If you place them on top of one and other, do the inner spline bolt holes line up? How bout the outer bolt holes, specifically where the threaded spacers are? Can you put a dowel through all the bolt holes to the clutch plate underneath?
Any chance you have a scale and can weigh them?
The part number for the RS6 shows it fits 12 different models which is good news.
Audi A6 3.0L V6 A/T Quattro Competition Sedan|2017|
Audi A6 3.0L V6 A/T Quattro Premium Plus Sedan|2012, 2013, 2014, 2015, 2016, 2017, 2018|
Audi A6 3.0L V6 A/T Quattro Premium Sedan|2012, 2013, 2014, 2018|
Audi A6 3.0L V6 A/T Quattro Prestige Sedan|2012, 2013, 2014, 2015, 2016, 2017, 2018|
Audi A6 3.0L V6 A/T Quattro Sport Sedan|2018|
Audi A7 3.0L V6 A/T Quattro Base Hatchback|2012, 2013, 2014|
Audi A7 3.0L V6 A/T Quattro Competition Hatchback|2017|
Audi A7 3.0L V6 A/T Quattro Premium Plus Hatchback|2015, 2016, 2017, 2018|
Audi A7 3.0L V6 A/T Quattro Prestige Hatchback|2015, 2016, 2017, 2018|
Audi A8 3.0L V6 A/T Quattro Base Sedan|2013, 2014, 2015|
Audi A8 3.0L V6 A/T Quattro L Sedan|2013, 2014, 2015, 2016, 2017, 2018|
Audi A8 4.0L V8 A/T Quattro Base Sedan|2013, 2014, 2015|
Audi A8 4.0L V8 A/T Quattro L Sedan|2013, 2014, 2015, 2016|
Audi A8 4.0L V8 A/T Quattro L Sport Sedan|2017, 2018|
Audi A8 6.3L 12 cylinder A/T Quattro L W12 Sedan|2015, 2016|
Audi Q5 3.0L V6 A/T Premium Plus Sport Utility|2013, 2014, 2015, 2016, 2017|
Audi Q5 3.0L V6 A/T Prestige Sport Utility|2013, 2014, 2015, 2016, 2017|
Audi Q7 3.0L V6 A/T Premium Plus Sport Utility|2017, 2018, 2019|
Audi Q7 3.0L V6 A/T Premium Sport Utility|2017, 2018, 2019|
Audi Q7 3.0L V6 A/T Prestige Sport Utility|2017, 2018, 2019|
Audi RS7 4.0L V8 A/T Base Hatchback|2014, 2015, 2016, 2017, 2018|
Audi RS7 4.0L V8 A/T Performance Hatchback|2017, 2018|
Audi S4 3.0L V6 A/T Base Sedan|2012|
Audi S4 3.0L V6 M/T Base Sedan|2012|
Audi S5 3.0L V6 A/T Base Convertible|2017|
Audi S5 3.0L V6 A/T Base Coupe|2013, 2017|
Audi S5 3.0L V6 A/T Cabriolet Convertible|2013|
Audi S5 3.0L V6 A/T Premium Plus Convertible|2014, 2015, 2016|
Audi S5 3.0L V6 A/T Premium Plus Coupe|2014, 2015, 2016|
Audi S5 3.0L V6 A/T Prestige Convertible|2014, 2015, 2016|
Audi S5 3.0L V6 A/T Prestige Coupe|2014, 2015, 2016|
Audi S5 3.0L V6 M/T Base Convertible|2017|
Audi S5 3.0L V6 M/T Base Coupe|2013, 2017|
Audi S5 3.0L V6 M/T Premium Plus Convertible|2014, 2015, 2016|
Audi S5 3.0L V6 M/T Premium Plus Coupe|2014, 2015, 2016|
Audi S5 3.0L V6 M/T Prestige Convertible|2014, 2015, 2016|
Audi S5 3.0L V6 M/T Prestige Coupe|2014, 2015, 2016|
Audi S6 4.0L V8 A/T AWD Premium Plus Sedan|2016|
Audi S6 4.0L V8 A/T AWD Prestige Sedan|2016||Audi S6 4.0L V8 A/T Base Sedan|2013, 2014, 2015|
Audi S6 4.0L V8 A/T Premium Plus Sedan|2017, 2018|
Audi S6 4.0L V8 A/T Prestige Sedan|2017, 2018|
Audi S7 4.0L V8 A/T Base Hatchback|2013, 2014, 2015, 2016|
Audi S7 4.0L V8 A/T Premium Plus Hatchback|2017, 2018|
Audi S7 4.0L V8 A/T Prestige Hatchback|2017, 2018|
Audi S8 4.0L V8 A/T Base Sedan|2013, 2014, 2015, 2016|
Audi S8 4.0L V8 A/T Plus Sedan|2017, 2018|
Audi SQ5 3.0L V6 A/T Premium Plus Sport Utility|2014, 2015, 2016, 2017|
Audi SQ5 3.0L V6 A/T Prestige Sport Utility|2014, 2015, 2016, 2017|
I did stack them on top of one another and the holes did line up but I will again & as you suggest dowel the holes and look for an exact match. Can weigh them also. Standby.
Interesting the S4 is in your list.
Exact same engine/transmission as the S5.
RS5 flex plate is 2.476kg ( 5.46 lbs )
RS6 flex plate is 2.685kg ( 5.92 lbs )
Have to say it looks promising. I’d probably send the RS6 plate to a qualified machine shop and have it balanced down to the gram. Might send the RS5 plate along and see if they can spot any reason why the two wouldn’t work together. They’d also have to make sure it’ll spin up to 9k rpm safely.
You can offset the weight gain by using JHM’s lightweight flywheel.
I didn’t have the right size dowel but a rudimentary alignment with Phillips screwdrivers and coach screws leaves me to believe all the holes line up. Pictures attached.
That’s a great idea, will get this done and get the hole alignment looked at and advise.
Is this the light weight flywheel you mentioned;
Yes that’s the one buddy, if your after one speak to Jake at JHM as he is doing a group buy i believe to knock the price down a little !
That’s min. 10 lbs lighter. Will it handle the extra power ?
Yeah good point had not thought about that, hopefully it would do ??
As Steve said, that’s it. Don’t purchase it through the site yet. They’re setting up a group buy and they’re not made yet.
Yes, it’ll absolutely handle the power. It’s no longer a two-piece flywheel and thus is lighter and stronger.
One more question on the clutch plates. Looking at your last post, top photo, is there a pilot bearing in there? If so, is the inside diameter of the snout on both the same?
I was looking through the factory service manual yesterday and under the transmission, they do not mention the clutch plate once. Ran out of time but it’s under the engine section. Going to look at it in a few to see if they mention anything.