Great point A6 v8. Seeing some of this project and talking for years with the guys at magnaflow flow master hooker and with the local guys at Roush racing you see how the little things all add up.
The angle duration and location of the X is huge and when you realize that it might not fit in the most convenient location that just keeps adding to the details that others might not pick up. Also as vtgt picked up on was that you can loose power if your entire system isn’t built right.
Also just for the sake of conversation. Superchargers > turbos.
With a big v10 and mid to low rpm tq. That’s a huge win and great for everyday driving
Agrew on the exhaust setup comments, but im on differing viww for the sc comment. I’ll also point out that an efficient twin turbo setup is more than ideal with this motor. The v10 is already torquy enough for me and if anything it doesn’t Rev up high enough due to trans etc. But higher revs with appropriate sized turbos would be fun. All things equal I’d prefer a well designed twin turbo setup over a sc setup. That’s just me tho, different strokes for different folks. Also if you look at the c6 rs6, I’m sure they had the option to use the 5.2 or 5.0 and simply sperchsrge it but they went with twin turbos.
Also, if you look at mercedes they have the sl55 which was supercharged v8 and then they had NA v12 in the 600 until 2003 which they then went twin turbo v12 as opposed to supercharged v12. I will admit supercharged tech has improved along the way, but just the oil wing those observations out there.
The main reason why turbos are used so often in today’s cars in OEM applications because of their efficiency when determining fuel ratings. Superchargers are generally less efficient (although the Vortech centrifugal is pretty good).
If you want a twin turbo Audi, then buy a new S6.
Reasons why I would only go with a supercharger on the v10, and never a turbo
I hate turbo lag
With the headers, we are doing a ton of work to fix the poor placement of the cats and o2 sensors that cause excessive heat in the engine bay, and require an engine pull to get to. No way I am going to try and stuff a couple turbos back there, and deal with all kinds of problems that require an engine pull to resolve (if they even fit)
Two turbos - twice the amount of things to buy, and twice the amount of turbos to break. One supercharger in an accessible location up front makes WAY more sense
Superchargers have a more linear response, which I much prefer
Superchargers are easier to tune for. Who do you plan to have tune your twin turbo v10?
Twin turbo HEAT! Your v10 isnt hot enough already? ? ? LOL. Read the info dump and this thread again. Heat is the enemy with these cars
JHM proven track record with Vortech superchargers and the v8 Audis. How many twin turbo kits do you see for the v8 or v10 Audis that were successful? None, unless you include the UGR stuff that is designed for top speed, and starts at like $20k. Don’t try to reinvent the wheel. Stick to what has been proven to work
And finally, the biggest reason why I would NEVER put twin turbos on the v10, is it will ruin the glorious sound of best sounding Audi sedan that will probably ever exist… While the supercharger will only impove on it.
As mentioned in the thread, the project is on hold while the drivetrain is being used to build headers for other S6 owners. There will be no further updates until at least August/September.
Agreed and agreed, if were talking money a supercharger is much more efficient, won’t have lag, and much easier to maintain and heat will be less of an issue but still an issue none the less. The rs6 v10 still sounds great, and while heat soak is there I’ve seen run after run with nothing other than a tune and it still performs wonferfully.
If money were no object I’d still place bets on custom twin turbo setup with method injection. But your right if you want to retain mkr na feel sound maint etc. A super charger works great. But most every high hp project is a single or twin turbo setup
CN: I’d rather not bother with either cause to your point both will add complexity, heat and maint, and when you have a glorious all motor v10 with 500hp and have actually cooled it down quite a bit why complicate things for another 50-100 hp (depending on boost)
Will keep you posted in my s8 project via PM. Look fwd. To additional updates form u in the fall.
No one was having convo like the list two years ago so I’m glad yall are picking up where I left off
It is great to see so much real conversation. Vtgt of you can make a post about your old car so it can be part of helping future v10 guys knowing how we got here.
As for the turbo stuff a lot of miss conceptions vs blowers. You can fine lots of 1000+ hp supercharged cars even 1500+ and more if you need a blower to make 2000 hp they make one
Once I find some old pictures and info I will dump them here for sure.
Like you said turbos and scs are more personal preference. If money was no object I would just build the motor, trans, twincharge , add meth, and perhaps small bottle of nitrous that would be fun right
All kidding a side I’d like to see any v10 s6 or s8 with forced induction. But at the same time the reason I like these cars is they are simple and big motor so why mess with that, if you you could get a c5 rs6, or any new s or rs variant (except rs5) once you have invested that money. I’m still trying to import a true c6 rs6 through mexico standby
Had a crazy thought, anyone think to do a stroked motor in one of these? Back in my m5 days Folks were doing stoker builds from 5.0 to 5.7, I now read Dinan upped their kit to 5.8, and other vendors who did 6.0. The latest results I googled were 580-600 rwhp. For reference a stock m5 is 390-415 (if my memory serve me right) depending on the Dyno.
Do you all think it’s worth considering looking into, a 6.0-6.2 may be kinda fierce, I’m sure it will be 25k+ like the m5s but it’s another option I’m willing to ponder for that all motor glory. Also we know these motor have some different between what is in the gallardo, but I’m curious what changes lambo did to their 5.2 to get 600chp in the huracan, as the 5.2 in the gallardo was more like 520-553 chp depending on year and model.
The more and more I read this thread the more I want to find a super high mileage s8 and go to town! :o keep your eyes out for one that needs motor work so I can rebuild
Rebuilding these engines is going to be just like rebuilding the B7/B7 S4 engines… no easy task. JHM or UGR ($$$) are the only ones I would trust with rebuilding one of these.
vtgt, let’s see how much you know about performance engines. Here are the stock specs for the Audi 5.2:
5.2 — 5,204 cubic centimetres (317.6 cu in); bore x stroke: 84.5 by 92.8 millimetres (3.33 in × 3.65 in)
Is it a GOOD candidate or BAD candidate for a stroker rebuild?
Still doing a little motor research, and after reading up more on the huracan it looks like the 5.2 is employing direct injection and mutlipoint injection which is a first on a v10, that and a few other changes and the huracan is 600 ish hp, they even put start stop on it. To the rebuild question I agree I’d only trust jhm to do it, but it may not be worth it, perhaps better idea to drop in a slightly used motor then rebuild unless you have loads of cash
Can we get the bore and stroke on the 5.2 Lamborghini stuff. That would help. Over all stroker motor is great but 5.2 v10 is very usable for making good power.
The same bore and stroke says we shouldn’t change anything bore and stroke wise on the audi s6 or S8 side as the Lamborghini motor goes to 8000 rpm so we know we must have a good piston to rod stroke ratio.
If you are really considering going that deep into the bottom end I’d like to note there have been issues we have seen with cylinder wall scoring with out any performance enhancements. There may be damage that wont show up until we start making serious power. If we get to that point id consider forged pistons a look at our rods (other audis are prone to bend) and cylinder sleeves if there is damage. http://www.titanmotorsports.com/lamborghini-gallardo-sleeves.html I know they are not cheap but if the engine already has cylinder wall damage a new engine is about the same or more why not go the route of the upgrade.
This is actually a great point with the sleeves. Some less then educated types wonder why the aluminum v8 motor cost so much to build when you sleeve it. Well you can see right here the sleeves for the v10 are 5 k and that’s not installed that’s just 5 k for the sleeves.
