Silverminken Posted June 29, 2008 Report Share Posted June 29, 2008 i got a 1997 audi s8 and i have had some thougths about buying a supercharger for it. But i dont know if i have to any major changes, like cluth/transsmision uppgrades and ect. do the original parts handle a supercharger ? is it possible to get it street legal? is it a bad idea ? Tell what u think about this or if u have any ideas about it. im not satisfaid with the power i got now. Thx for a great forum and forum members. i ahve solved many problems thanks to u all =) Quote Link to comment Share on other sites More sharing options...
Ska Posted June 29, 2008 Report Share Posted June 29, 2008 Welcome to TSN fella Your running 400+ brake and your not satisfied:eek: How are you managing the 400hp? Quote Link to comment Share on other sites More sharing options...
Figure11 Posted June 29, 2008 Report Share Posted June 29, 2008 Welcome to Tyresmoke and the A/S8 forum Silverminken. The subject of forced aspiration is quite a popular one and if you search for Supercharger / turbo / turbocharger you will turn up quite a few posts on this forum. The main drawback to doing it is the cost. There are no specific kits for this car although firms like MTM will build you one. As for the extra stresses, the same running gear is used on the W12 6 litre variant that never came to this country and that produces about 120 BHP more than your AHC engine does. So it's quite capable of taking the extra ponies. The cost though will be the main factor. These guys also do a bespoke solution as can be seen here..... More available here. One forum member has a project under way. Maybe he'll post some idea of cost and complexity. Mike Quote Link to comment Share on other sites More sharing options...
Botang Posted June 29, 2008 Report Share Posted June 29, 2008 Its difficult to advise without knowing your technical know how, no offence but I'm guessing from the questions in your post above that you would be looking for an off the shelf solution, in which case MTM is the only option that I'm currently aware of, and that is very expensive. A 97 S8 was supplied as standard with 340hp, thats a good effort to get it to 400hp without forced induction. Quote Link to comment Share on other sites More sharing options...
Silverminken Posted June 29, 2008 Author Report Share Posted June 29, 2008 thx for the warm welcomes. "ska" im not sure why im not satisfied with 400hp all i know is that when i step on it i want more to happen =) its not many cars in my town that can keep up with me but i just want more =) maybe im an adrenalin adict or something "figure11" i know that its a very high cot but i woundering if its worth it. i have found a firm that have 4 kinds of kits. if i understand them rigth the kits are all parts needed to mount and use it. these kits did they have powerdyne centrifugal Compressor kit running 6.5 psi $ 7,500 powerdyne centrifugal Compressor kit running 9.5 psi $ 9,200 lysholm twin screw Compressor kit running 6.5 psi $ 10,500 lysholm twin screw Compressor kit running 9.5 psi $ 12,500 its alot of cash but maybe its worth it ? im not very good on cars yet either, well lets say im not bad at cars just that i dont have that much experience yet. im very technical an have easy to learn by doing but i dont know if im capable off installing something like this. Quote Link to comment Share on other sites More sharing options...
Figure11 Posted June 29, 2008 Report Share Posted June 29, 2008 Whereabouts are you based Silverminken. Your quoting in dollars but have a Europe only spec S8. The manual 6 speed S8s never left Europe. How have you managed 400BHP? What tuning have you done. If you have found a supercharger kit on Ebay from the USA be very careful! there is a well known (to the Audi community of Audiworld) Con artist selling these kits! Have you got a link? regards, Mike Quote Link to comment Share on other sites More sharing options...
slowwy1 Posted June 30, 2008 Report Share Posted June 30, 2008 It's very interesting to see how they fit the Powerdyne unit. I assume it's a BD11A they are using and that's quite big for the room available. Quote Link to comment Share on other sites More sharing options...
Silverminken Posted June 30, 2008 Author Report Share Posted June 30, 2008 im note sure what tunes are made cause it wasent me who did it. but the things i know is *new camshaft *i dont know the english word but its something with the "holes" in the engine they r "drilled" or something so they r bigger. (sry for bad explanation but i cant find the english words for it ) *the main computer is modified. dont know the exact words here either but its modified so the engine gets the best fuel/air mixture and things like that. well thats the things i know is changed but im not sure if there is more to it. its kind of hard for me to explain cause im not that good in english. im not sure of the exact horsepower value but its somewear above or under 400. I didnt find these kits on ebay. its a company called motodyne that sell them. Motodyne.com.....Three can keep a secret if two are dead. i have been in contact with them via email and he is saying to me that he has a used supercharger system for 3400USD = Audi 4.2L & 3.7L 4 valve ABZ & AHK Supercharger system Quote Link to comment Share on other sites More sharing options...
Sven Posted June 30, 2008 Report Share Posted June 30, 2008 I've been toying with that idea myself, also talked to Motodyne. In the end I discarded the idea. It was rather bad value for money, i.e. too expensive for what you get with a high compression engine. ('bolt on' superchargers are great for US engines, cos there's a lot to be gained - not an S8 that's already pretty well tuned). Also it turned out to be quite a hassle to get the stuff over here, and find a capable tuner. (At the time no-one ever done that round these parts). Also there were/are repeated rumors about the reliability of said supplier, or lack thereof. If you really want to get even more power - and still a reliable car - you'll have to find a reputable tuner and be prepared to pay huge amounts of money. My two bits: be happy with the ample power you already have under your right foot... Quote Link to comment Share on other sites More sharing options...
Figure11 Posted June 30, 2008 Report Share Posted June 30, 2008 MOTODYNE - avoid like the plague. Check this link..... AudiWorld Forums: motodyne, long over due The go to Audiworld and do a search for Motodyne. Don't do it. You'll regret it. It sounds like you have had your cylinders bored out, as well as new Cams and a remap. If that is so it would be interesting to hear about it. Write it up in your own language and I'll translate it if that is ok with you. Mike Mike Quote Link to comment Share on other sites More sharing options...
IT_S8 Posted July 1, 2008 Report Share Posted July 1, 2008 MOTODYNE - avoid like the plague.Check this link..... AudiWorld Forums: motodyne, long over due The go to Audiworld and do a search for Motodyne. Don't do it. You'll regret it. It sounds like you have had your cylinders bored out, as well as new Cams and a remap. If that is so it would be interesting to hear about it. Write it up in your own language and I'll translate it if that is ok with you. Mike Mike Does anyone have any feedback on the Lysholm twinscrew supercharger that they claim to use? Youtube shows it in use in some corrados..... Just wondering.... Quote Link to comment Share on other sites More sharing options...
Botang Posted July 1, 2008 Report Share Posted July 1, 2008 The lynsholm is a very nice unit, very efficent and doesn't produce too much heat, I think its an OEM fit on a Ford GT and some other very high power cars. Quote Link to comment Share on other sites More sharing options...
IT_S8 Posted July 1, 2008 Report Share Posted July 1, 2008 The lynsholm is a very nice unit, very efficent and doesn't produce too much heat, I think its an OEM fit on a Ford GT and some other very high power cars. Oh dear... Thats just the positive response that I didnt want to hear.... Now I'll have to investigate it further.... Quote Link to comment Share on other sites More sharing options...
Sven Posted July 1, 2008 Report Share Posted July 1, 2008 I think the prob is with Motodyne, not so much Lysholm. The M. kit is reputedly so-so, and the reliability of the company 0.0 (bordering on criminal behavior, or so I'm told). But what are your looking for exactly? I did some posts way back when about all this, as did others. Quote Link to comment Share on other sites More sharing options...
Silverminken Posted July 1, 2008 Author Report Share Posted July 1, 2008 MOTODYNE - avoid like the plague.Check this link..... AudiWorld Forums: motodyne, long over due The go to Audiworld and do a search for Motodyne. Don't do it. You'll regret it. It sounds like you have had your cylinders bored out, as well as new Cams and a remap. If that is so it would be interesting to hear about it. Write it up in your own language and I'll translate it if that is ok with you. Mike Mike i dont think its the cylinders that is bored out, it the "other holes" i think. i dont know if its the valves. im not sure hard to explain in english the part about remap and cams r rigth. Well figure11 here comes a short description in swedish and u can translate it if u want. Bilen är portad, mapad och byt kamaxlar. i know u probably want to hear about the procedure but i dont know anything about it cause its was the previous owner who did it. Quote Link to comment Share on other sites More sharing options...
Sven Posted July 1, 2008 Report Share Posted July 1, 2008 The ports flowed perhaps? Quote Link to comment Share on other sites More sharing options...
Silverminken Posted July 1, 2008 Author Report Share Posted July 1, 2008 The ports flowed perhaps? Ya i think thats the thing they did =) Quote Link to comment Share on other sites More sharing options...
Figure11 Posted July 2, 2008 Report Share Posted July 2, 2008 i dont think its the cylinders that is bored out, it the "other holes" i think.i dont know if its the valves. im not sure hard to explain in english the part about remap and cams r rigth. Well figure11 here comes a short description in swedish and u can translate it if u want. Bilen är portad, mapad och byt kamaxlar. i know u probably want to hear about the procedure but i dont know anything about it cause its was the previous owner who did it. Ok, The car has been ported , remapped and new camshafts is the direct translation. Given the AHC engine has ported and polished heads on manufacture, the remap and camshafts have done a good job. I would be interested in where the Camshafts came from as parts to tune these babies are few, far between and very expensive. Thanks for that Silverminkin. Mike Quote Link to comment Share on other sites More sharing options...
Silverminken Posted July 2, 2008 Author Report Share Posted July 2, 2008 i can try to get hold off the old owner and ask him about were he got the camshafts. i cant promise anything but ill try to contact him =) Btw i have been informed that on my job they have a machine to test the amount of horsepowers (i dont now the english word for the machine) so ill post the exact amount of hp´s i got as soon as i done that. and one more thing, i must say that im suprised about how many wrote in this post, (this is my first membership on a forum) i didnt think so many would answer. Thx for answering me guys =) Quote Link to comment Share on other sites More sharing options...
LostKiwi Posted July 2, 2008 Report Share Posted July 2, 2008 It would be really interesting to see what the power curve looks like too. I can see a number of members salivating at the thought of cam/head jobs (oooh err missus!) but one thing to note is that our cars are all autos whereas Silverminken's is a manual. That seriously constrains what we can do as we have to maintain enough low down torque to keep the torque convertor happy (and having a lumpy cam in the truck it can be a right pain with idling at times or engaging drive/reverse without it stalling). The only two solutions are to invest in a high stall TC or go to a manual transmission. Personally given the frequency of gearbox issues on the A8 anyway I'd look for a 6 speed to fit if you were looking at this route....... Quote Link to comment Share on other sites More sharing options...
IT_S8 Posted July 2, 2008 Report Share Posted July 2, 2008 I think the prob is with Motodyne, not so much Lysholm.The M. kit is reputedly so-so, and the reliability of the company 0.0 (bordering on criminal behavior, or so I'm told). But what are your looking for exactly? I did some posts way back when about all this, as did others. Not really looking for anything specific - We were just going to have a 'fiddle' with a test car and see what was possible. Reliability and roadlegalness aren't concerns right now, so it gives us a fairly blank sheet of paper to work with. From what I've gathered so far it seems that given the complexities of trying to squeeze a turbo in, and the resultant heat and pipework problems, it would be somewhat easier to just throw away (or in our case sell) the A/C compressor and replace it with a supercharger. Sort out a bit of revised airflow, some cooling and bobs your uncle... I know this is a very simplistic view, Im assuming in practice that without remaps and bigger fuel injectors there will be little power gain. Then theres probably a little complication as well doing this to an engine that was only designed to run 310bhp... I blame Botang.... He started me on this whole power to weight ratio thing... Im expecting at least 4 pages of text from Mike in reply to this, explaining how why when and whos already done it, to what and in which country - and of course at least half a dozen web links.... Quote Link to comment Share on other sites More sharing options...
PaulW Posted July 3, 2008 Report Share Posted July 3, 2008 If you guys really wanted some power....somebody on the D2 forum on audiworld recently put NOS in his S8, I can't remember if it's wet or dry...but he put it upsteam of the air filter....it was a nice install. The supercharger thing would be very hard to work out the details with the ECM in my opinion. Quote Link to comment Share on other sites More sharing options...
EddyH Posted July 3, 2008 Report Share Posted July 3, 2008 Wouldn't an engine and ecu transplant from a 4.2 BiTurbo RS6 be easier and cheaper than trying to get a supercharger to work? Quote Link to comment Share on other sites More sharing options...
IT_S8 Posted July 3, 2008 Report Share Posted July 3, 2008 Wouldn't an engine and ecu transplant from a 4.2 BiTurbo RS6 be easier and cheaper than trying to get a supercharger to work? Tempting, but its been looked at before. Apparently the way the turbos mount on the RS6 just isn't doable in the limited space of the A8, and given the alluminium chassis heat is a big problem too. The RS6 block may well fix some reliability issues with handling the power, but it doesnt look quite like a plug and play job for forced induction. Quote Link to comment Share on other sites More sharing options...
Sven Posted July 3, 2008 Report Share Posted July 3, 2008 No, the RS6 route isn't plug and play, but it's regarded by many as the easiest way. Pretty reliable too, and the increase in power would be pretty much guaranteed. As for a supercharger - though it'd be tempting to try - it's all a bit iffy. That said, I'd applaud you for coming up with a decent 'kit'. As many here know I've been VERY tempted in the past to do this, but gave up on the idea in the end. It'd cost me between €8k and €10k to have it done, no-one here ever done anything like it, and the power gain and reliability were a couple of big question marks. (unless you choose to believe everything Motodyne claims). Thought about the RS6 route too, but (at the time) these engines certainly weren't cheap either. Given the fact that I just had a brand new S8 engine (now with ~ 45K kms) I decided to be happy with what I've got. But yeah, *more* is always tempting, and in your position and being able to do all the work yourself, that's a big difference. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.