Turbos - options.

[S4Player]

Keen to hear how you've got on with these turbos, have just bought a second hand pair of OEM turbos ready to send over to TTE for conversion with a view of following the same path.

What did you do for the 3.5" downpipes off the back of the turbos, was it a rework of the oem flange?

cheers,
rich

Engines been pulled from the car and turbos are away back to Germany. Joys of being the first set on a car, TTE and Mrc working together to get the car on the road ASAP. As soon as I’ve anything worth posting I’ll share it. Custom made downpipes by hard knocks speed Shop, give badger an email I’m sure he’d be happy to help you out mate

[Toady1]

Regarding turbo options - has anyone come across TTH turbos? That's Turbo Technik Hamburg, rather than The Turbo engineers, which I always hear about (perhaps for good reasons).

They have three options for the C6 RS6: 850PS, 950PS and 1000PS.

It's all in German, so not so easy to understand exactly what they're selling, or how they compare to the usual favourites, but I was surprised I never read about them.

Nick

https://www.turbo-technik-hamburg.de/sh ... -950ps?c=6

I saw these on ebay too. Has anyone else any experience on them €3k for 950ps vrsions and €2600 for their 850ps ones exchange.

[RS6-T28RPH]

TTE Global have accepted me as a reseller via my remapping business so thats a right result.

The objective will be to get the ones from ebay converted then bolted to the car, the spares will then be up for grabs however if anyone is interested I may get these converted to 1000ps as well then it would be the cost of the conversion + 800 euros for what I paid.

[Toady1]

So....nobody has any experience with using TTH opposed to TTE then???

[IanH755]

I don't think anyone has as TTH haven't advertised much in the UK, so unless you catch an eBay ad you'd probably only know TTE as they advertised here quite heavily with a Rep on the board etc.

[Jim Haseltine]

It's quite likely that the RS6 shares it's CHRA with several other cars, so there should be a good supply if you can work it out. I'm not there yet.

Currently it's looking like the turbos are IHI RHF55 but I can't yet confirm that. It appears that the RHF55 is also used by Subaru on some Legacy, Outback and Impreza models.
I'll keep digging.

Ah. There's a fair bit of misleading information (or disinformation) around but it's seeming more likely that they are actually RHF5 spec JH5 turbos. Also used on a number of other VAG models, typically 2 litre TFSI engines. Quality stock CHRAs start at around £130 +vat.
If that's correct then that's 2 CHRAs for around a tenth of what Audi are asking for one turbo. Seems a little too good to be true.
My turbos should be off the car in the next week or so (weather and family commitments allowing) - I'll take things further then.

[welwynnick]

Currently it's looking like the turbos are IHI RHF55 but I can't yet confirm that. It appears that the RHF55 is also used by Subaru on some Legacy, Outback and Impreza models.
I'll keep digging.

Ah. There's a fair bit of misleading information (or disinformation) around but it's seeming more likely that they are actually RHF5 spec JH5 turbos. Also used on a number of other VAG models, typically 2 litre TFSI engines. Quality stock CHRAs start at around £130 +vat.
If that's correct then that's 2 CHRAs for around a tenth of what Audi are asking for one turbo. Seems a little too good to be true.
My turbos should be off the car in the next week or so (weather and family commitments allowing) - I'll take things further then.

That sort of thing sounds credible.
I did a lot of reverse engineering a few years ago when I rebuilt the turbos in my Merc S600 V12TT. There was no information around, so I had to strip them down to find what the actual spec was. Although there are LOTS of different turbo part numbers , largely down to the different turbine and compressor housing combinations, the number of CHRA configurations in use is not as great as you might think. Each CHRA is often used on a very wide range of different cars and manufacturers.
The internet is very useful, but not everything is accurate, so it's best to find two or three independent, corroborating sources of information.
Some people keep their cards close to their chest, but there are a few turbo rebuilders who publish huge amounts of turbo design information.
Nick

[welwynnick]

So....nobody has any experience with using TTH opposed to TTE then???

TTH seem to be unknown in this country, but there seem to be lots of happy owners in Germany. They've been selling turbo upgrades on eBay for many years, and for the sort of business they're in, it's very difficult to maintain such good feedback. The product/service they sell is complex and full of pitfalls, but they're record is exceptionally good. That can't be an accident, so I'd have a good deal of confidence in buying from them.

I was considering going down the TTH route, but I wondered whether there was a good reason NOT to use TTE? I'm just getting a LITTLE suspicious about the lack of successful TTE1000 tuning results.

Nick

[S4Player]

So....nobody has any experience with using TTH opposed to TTE then???

TTH seem to be unknown in this country, but there seem to be lots of happy owners in Germany. They've been selling turbo upgrades on eBay for many years, and for the sort of business they're in, it's very difficult to maintain such good feedback. The product/service they sell is complex and full of pitfalls, but they're record is exceptionally good. That can't be an accident, so I'd have a good deal of confidence in buying from them.

I was considering going down the TTH route, but I wondered whether there was a good reason NOT to use TTE? I'm just getting a LITTLE suspicious about the lack of successful TTE1000 tuning results.

Nick

I’m the only car in the world currently running them that’s why there’s no results. Mrc and TTE working together closely to get the best results possible from them. Not long now

[zex]

I would also have to agree that something is not right since it's been almost half a year without any tuning results. This was more than a month ago (from another forum) so I don't think you are the only one.

Quote

[S4Player]

I would also have to agree that something is not right since it's been almost half a year without any tuning results. This was more than a month ago (from another forum) so I don't think you are the only one.

Screenshot_20190429_150851.jpg

I’m the only car mate There was meant to be a set On a German car, it never materialised. Pretty sure there’s an MTR car in Germany about to install them though. There’s also a french guy who’s doing a set but he’s waiting on my results before deciding to switch from the 850’s. He’s the lad who’s car done 235mph verified on the autobahn. You only need to look at TTE’s track record and results to know they will get the turbos right

[welwynnick]

Yup, it's not TTE I'm worried about. I think it's all the supporting mods. A 1kbhp RS6 is like having two tuned RS3 engines, and everything needs to be equivalent - intakes, exhaust, fuel pumps, air filters and particularly the intercoolers.

They need both the cooling capacity and the flow capacity. From what I can tell from an analytical and empirical (and I can witter about this for a long time) the stock coolers are barely good enough for stock power, and are probably helped by the moderate stock boost level.

Intercooler specification does NOT just depend on engine power. If the power is achieved with higher boost, the heat dissipation requirement increases exponentially, not linearly.

The short of this is that a 1kbhp car will need much better intercooling, and I have a suspicion that it will be difficult to improve on the TTE850's.

Regards,

Nick

[IanH755]

Chatting to Doug at MRC and he said that Sportmile did a front mount IC which removed the main radiator and replaced it with either a single thinner one and/or, and I'm not 100% if I remember this correctly, two bigger ones where the original IC's would go.

An FMIC would solve almost all of the big power C6's IC issues but thers a lot of extra Fab work to get it all to fit.

[Jim Haseltine]

It's quite likely that the RS6 shares it's CHRA with several other cars, so there should be a good supply if you can work it out. I'm not there yet.

Currently it's looking like the turbos are IHI RHF55 but I can't yet confirm that. It appears that the RHF55 is also used by Subaru on some Legacy, Outback and Impreza models.
I'll keep digging.

Ah. There's a fair bit of misleading information (or disinformation) around but it's seeming more likely that they are actually RHF5 spec JH5 turbos. Also used on a number of other VAG models, typically 2 litre TFSI engines. Quality stock CHRAs start at around £130 +vat.
If that's correct then that's 2 CHRAs for around a tenth of what Audi are asking for one turbo. Seems a little too good to be true.
My turbos should be off the car in the next week or so (weather and family commitments allowing) - I'll take things further then.

Curiouser and curiouser... now I've got one stripped the internals don't match the specs I've been able to find for RHF5 JH5, with neither the turbine or compressor wheels matching. However, on the inside of the front seal plate there's a VVA1 code, which is a model of RHF55 turbo with a 74008NBR479CB code and the spec plate on my turbo carries a similar(ish) 74008P14NSBRL 479CBZ.
The dimensions of some RHF55 compressor wheels match those on my turbo but I can't yet find a match on the turbine wheel.

[S4Player]

Turns out I had a fried ecu, engine will be back in next week with the new TTE1000 still in place. Fingers crossed we aren’t far away now