So I've walked 5 miles this morning, just finished fixing my car, and then had a shower in a satisfied mood. I feel content whilst ready for lunch in an hour. Switch on youtube to find Ryan coming through like a boss with the Sunday Funday content. Legend. I can retire after this lol

Reyt then

Love how the torque kicks in even earlier. Must be a hell of a drive but also relaxing too.

.. Ryt then.. This valve opens and pushes into this one, this popper opens and pushes into the big one which pushes a lever into the small one then the initial boost is multiplied by the quad-core processor on the small one which then adjusts the big one which is crucial hsnnsnjdjhdbdbdbbbxnxjxjxjnaakaksjsnnsndjs..... But in the end we making more power!! I'm sold by the last two words. 🤣💪

Look at that bottom end! That 50+ above idle. Pulling a trailer, that's amazing.

Would love to see this get to 440BHP then race against the S6 petrol variant to see how close it would be in a drag race!

Loving the frequent and HIGH-quality videos chaps!

Bi turbos witch operate in series and parallel are an ass to tune. But when you get it right it's absolute magic

The amount of metal grid is perfectly normal. Have changed the oil on 5 pcs 313 TDI and they were all full of metal grid on the magnets. Oil change was from 120.000 to 180.000km. Cheers from Denmark. Btw nice project 👌

Cannot wait to see the end result

Thank you for this update, very interesting.

Another really informative vid🙌🙌love the way your totally honest about products 👍👍most company’s would be spurting-out massive power gains just to sell them 👍😉good stuff keep it up 🙌🙌🙌

please make a propper sound video of it 😅 with different exhaust options... original exhaust with your Downpipes (with and without active sound)... complete Straightpiped from turbo back... and maybe a valved exhaust? i'll try to fit a used rs6 exhaust on it with a working valve module to have it loud when i want to 😉👌🏼

Can you do some 100 - 200 km/h runs with this setup? Would be nice to see how this compares to the so called 450hp+ BiTDI's on stock turbo's.

wow Ryan that's huge! 😂👍🏼

Epic Ryan I love a bitdi build 🔥🔥👌

As always, damned interesting! 😄

Maths+science = boost

Good honest video's 👌

In Romania we succeed to achieve 4xx hp with stock turbos and literally no smoke

I wish that would fit on a US specs Q5 TDI.

Could a similar setup to that be put on a standard 3.0TDI if the bitdi power and torque were sought-after? I'm not apposed to making that bypass valve being mechanically controlled.

Them boxs never drain full amount, when you strip them to repair you always get another few litres out on the bench.

Well explained 👍

I got a 3.0bitdi. Would be interested in the slightly bigger big turbo setup once mine takes a nose dive

Flippin eck

When I have done the trans is the past I disconnected one of the cooler lines and once I had refilled the system I ran it to pump a litre or so out from the cooler line. I then topped up and repeated until I got clean oil. This pushes the dirty oil out that sits in the torque converter.

Nice videos! You won’t get more oil than that from the transmission from just a drain as the torque converter will hold a few litres, but that’s the correct procedure anyway flushing is not really recommended. Also the noise you have is more likely to be the chain/tensioner, very common on these! Look forward to see’ing more developments 👍🏼

Just seen you at TCPerformance. Hope you found your way to your lift alright 😂

Have you considered developing your own hybrid turbo system with electronic valve control? seems like you said that the overlap would be more smooth.

Why you dont add big turbo and wastegate to the gtd28? And make true compound? You need boost if you want more power. Compounding is easy way to get that boost up

Lesson is is always change your oil. ZF say 50-80k

So much smarter than the ttid saab setup!!

Isn’t some of the oil staying in the torque converter You might need one of them flushing machines👍

I have a 3.0tdi quattro but with just a single turbo and the 8-speed tiptronic gearbox how feasible would it be to just bolt on the biturbo?

Thanks for the video, I’ve got one of these and have been following with interest. A couple of questions, what was the verdict on the gearbox after the flush? And, how much power can these gearboxes take? Cheers and keep up the good work.

VNT/VGT turbos are so good now, im not sure why audi don't just go single turbo on these? sure im missing something

What’s next for the gearbox? If an oil change doesn’t help, rebuild or replace?

Very nice, As an aside, 3.0 liter V6 Touareg, 2012, if you went balls out, bigger turbo, 6 oversize injectors, what could you squeeze out of it?😂

my bitdi gearbox was nearly the same at 65k miles (slightly less ferreous on the filter magnets). only strange things i have are clunky changes when cold into first gear. im now changing oil (roughly 4 litres) every year/10kmiles and this keeps the gear changes good. if i dont the clunking comes back. only changed the filter once at 65kmiles. oil comes out mucky every time. mine is mapped to 390hp and runs extremely hot over 4krpm, so i short shift. should really have it remapped to a safe egt limit. your turbo set up has a decent rise across the whole usable rev range, but as you say its going to be expensive for a relatively small gain. bring on the big turbo!! will the gearbox handle 1000nm?? and have your gearbox maps tightened up the first 3 gears? keep it coming! :)

Is this all with a standard air intake and filter setup? I've read it's decent with no mods. I saw you were experimenting with putting an RS6 style vent in the air box. How did that go?

Can this biturbo works on the audi Q7 2007

That turbo arrangment looks very complicated

Guys, I have a 2015 BiTdi and Audi say the gearbox is sealed for life. How often should I get the oil in the box changed?

do they make bigger compound set ups like this like in the 500hp range. I'd love to put one on my amrok

Hi guys, after 3 years of being desperate, I understood that 8HP (AL551) can be adapted for higher torque. I had engine swap (CGQB->CVUB) due to burned piston and the new engine is from facelift, but I was promised it was 100% same. Well since then the E clutch adaptation always ends up at -700mbar and that causes slight jerk on 1-2 and 5-6. More pressure to avoid slipping, however damages the E clutch I guess. That engine is puttin out more torque as the TCU is expecting, or at least TCU thinks it is more torque, because the dyno says 570Nm anyway. I have the 8HP55 transmission, but will try to update the AL551 TCU with facelift 8HP70 tranny software to see if it helps or not :-/ No one was able to help me for years with this. Do you think this jerk shifting due to -700mbar fill pressure (-300 to 300 is limit) could be fixed by doing a TCU tune? Did you do the TCU tune in case of your beautiful BiTDI? Thanks!!!

How well would it handle hybrid turbos with the aftertreatment intact? DPF and DOC.

Are you opening the exhaust change flap before you want the change over

That valve thing u showed at the start of putting back turbo sounds like what my noise is through the air filter box when I’m stationary and I select a gear , is it a characteristic of the car and nothing to worry about ?

After honest opinions here, Im an Audi guy through and through, but how does the Audi 3.0L Diesels compare to the BMW 3.0L diesels for power and mods?

Yes glad we got an update but I’m sure he had it to Audi no so long before he sold it to you for a service and I’m sure there’s a abart 2 years Audi service plan left on it too I do t know how it works with it been tuned now but when he bought it nearly 3 years to the day the original owner bought a 5 year Audi plan just before he sold it lads

Hello, So any more development on this car ? i have the same car now at the moment stage 2 with 373Hp and 773Nm

is there a difference in the 3.0 tdi engine and the 3.0 bitdi ? can a c7 a6 3.0 tdi be converted to a 3.0 bitdi without major work ? amazing channel btw !

Can I get this Turbo in your shop?

What about launch control in this car? Does it stress the gearbox too much?

Nice protype turbos

And I thought my wife could talk 😂

What this space then

So there is little one transition to big one ?

Definitely not worth the investment unless you are replacing the turbos anyway. On the old m57 335d's you can now fit hybrids that will take you to around 500 or more bhp.

Do they pass mot soot test with dpf delete

Is that power figure at the wheels or at the fly ?

Could this setup be used on a 2011 Q7 3.0L US version?

"comment: BIG TURBOS" xD

ive been looking at these but as i do short trips i dont want dpf issues, if you delete them does the car smoke alot?

Moor brek oss.....Be reyt..

On my bitdi the high pressure turbo is broken. Faultcode p0299 comes up when i touch the throttle and the rpm passes 2800rpm. Do you sell turbos?

All those electronic controls will get knackered and not work properly eventually from all the engine heat.

why does Audi seems to be like 100 -150 hp down to 3.0 diesels from BMW ?

Great content but let’s get to most important question did your son manage to do donuts with no hands 🙌 lol

Rejt then

Actually 410 bhp you can do with stock turbos, and some good intercooler so figures are not very interesting..

Where can you buy this?

Jesus that sounds complicated

whats the cost for 535d 2007 lci two turbos

Reyt then, just gonna get me ears lowered

Merch, Rate Then? 😂

As explained in the video far too expensive to justify, same with the 335d, just map and forget about it. But for 3.0 TDI and 330d going for a bigger turbo setup is fine.

why 2 when 1 big one would do the same job? yeah it would spool later but who cares

Poor explanation! Only experts understand what u are talking about!

Thank god for electric cars, all these complicated oil burning polluters antiques will be gone.

Reyt then

On my bitdi the high pressure turbo is broken. Faultcode p0299 comes up when i touch the throttle and the rpm passes 2800rpm. Do you sell turbos?