I don't feel so bad now...monster IC...monster headers...who knows what else...Been looking at my engine sitting on my table in my garage...was hoping to do something turbo-wise...pretty deflating how much room we have...
I don't feel so bad now...monster IC...monster headers...who knows what else...Been looking at my engine sitting on my table in my garage...was hoping to do something turbo-wise...pretty deflating how much room we have...
2013 Audi S8
SteveKen, have you had any luck with the ABS/ESP side of things? I have a new ABS controller that I am hoping to have coded to manual very soon (as soon as I have it in my hands actually). The ECU is already set to manual and is showing it's a manual via CAN bus. But I can't recode the ABS module as I don't think it's possible with the RS6 unit.
Oops sorry don't mean to thread jack.
To get back on topic, my built motor has Mahle forged pistons (8.8:1 comp), Pauter rods, head work, etc.
Judging from their other videos, I'm inclined to say that that is an RS4 motor (unless you've got some more details other than just the video). Any idea which EFR turbos they have on there? 800fwhp (~625awhp) is impressive no doubt, but I've got to say that, without the restraints of cooling, header limitations, intake on turbo etc, I'm surprised there isn't a little more power on a race gas blend and 31psi (depending on what turbos they are of course). Crazy motor nonetheless.
No need to worry about the thread jack, keep us apprised on any developments on the ABS/ESP front.
As for your motor build, any details on how you went about building the Alusil motor (piston alloy, piston-wall clearances ran, what rings/shape, special processes to treat the cylinder,etc)? If that's something you want to keep proprietary or simply not talk about, that's perfectly fine, just thought I'd ask because I'm curious. Were the pistons special order?
Interesting, numbers seem quite low for 30psi, race gas blend, unless of course the turbos are not that big. With GT30 turbos and that much boost I would be expecting >1000HP at the crank. Is this being developed to be put into a car? Not many cars I can think of that will take that IC.
Yeah..looks more like an expensive fact finding mission to me...
2013 Audi S8
I got really lucky with the spare engine I picked up it only had 2500km on it. When we stripped it and took it to my engine builder he said it was not even run in yet so we did not do anything with the bores. The pistons are custom order from Mahle with Alusil specific rings as the ring material is different to normal rings. The pistons themselves are same spec as stock execpt forged and 8.8:1 comp. I was prepared to get the cylinders honed as per Alusil requirements (my engine builder has done quite a few porsche Alusil engines before). I do have another spare block which I may actually look at putting in Darton Sleeves depending on how this engine goes. In all honesty I don't think it will be needed as with these turbos I will be surprised if I will be able to use anything above 25psi. Plans are 18-20psi for the stock engine and then 25-28 psi for the built engine starting with 98 (which is US 93oct) and then going to E85 if I feel like it. I'm happy to share anything about my build, I just wish others had the same thinking....As for your motor build, any details on how you went about building the Alusil motor (piston alloy, piston-wall clearances ran, what rings/shape, special processes to treat the cylinder,etc)? If that's something you want to keep proprietary or simply not talk about, that's perfectly fine, just thought I'd ask because I'm curious. Were the pistons special order?
What are you using for turbos?
2013 Audi S8
2 * GTX3071 Turbos, .82 Twin Scroll Housings
2 * Tial MVs gates
1000cc EV14 injectors (850cc 3 bar running at 4 bar)
twin Pierburg Pumps with surge tank
Twin B5 S4 MAFs (probably going twin R32 MAFs soon)
My full build thread is http://www.ozaudi.com/forums/showthr...t=20790&page=6 ther are too many pics to put it up on rs6.com as well. Sorry you may need to register to see the pics. If you want to see any in particular let me know and I will post.
I will post my initial dyno graph which was ~380awkw on 12.5psi on the auto tune with just some lemmiwinks settings, that was before the injectors and pumps were installed and I was maxing everything out, injectors, pumps, MAFs. That was also running way too rich but at the time I did not have enough control with just lemmiwinks, now thanks to Nefmoto I am tuning it properly. Initial Dyno graph below:
Thank you for the info. I guess I'll have to join later to see pics. Can we assume that you fabricated new headers for the 3071's, with waste gate ports?
2013 Audi S8
I DID join and DID look at all the pics. Took me a while to realize that everything is backwards and upside down!!!
Fantastic build and exactly what I always wanted to do...
2013 Audi S8
Milka, is it safe to say that those big turbos wouldn't have fit in any way with the big RS6 tiptronic tranny in there?
No chance of fitting them with the Auto in there. The manual is so much smaller and even then there is no real additional space in there most clearances are max 10mm a few are smaller. It really is a very tight fit, especially if you put external gates in there, these ones are also the Tial MVS watercooled, which means more plumbing in a place where there is not enough room to begin with....
If anyone were to try this or if I was to try it again, I would highly recommend to forget about twin scroll just because of the extra space required for the dual runners.
Does anyone know how much power the original pistons and connecting rods can handle?
Because I have an Broken RS6 engine (one piston and conrod is totally damaged) with only MTM ecu and bigger turbos= 861Nm/3946rpm