A8_Tony Posted October 9, 2004 Report Share Posted October 9, 2004 Hi all, Well I went to a company this morning to talk about potential exhaust purchase from moi. Now I drive a car, that from the headers through to the middle silencer runs twin 2" pipes. From there, 2 more pipes run to the rear silencer, again 2" in diameter. Now these guys are telling me, that if I were to replace the middle silencer, and pipework with a 2 1/2" single pipe (with the required 'y' piece after the cats) that this would give me better performance, than if I were to go the quad route, a la Sven and Botang (see here if you already haven't) Now as the post title suggests, I'm no exhaust guru, but if I've got two 2" pipes, then that effectively gives me almost 4" of flow, whereas the 2 1/2" would only give me 2 1/2"..... ....help meeeeeee!!! They've given me a good price too £650 all inclusive!! Link to comment Share on other sites More sharing options...
Paul Posted October 9, 2004 Report Share Posted October 9, 2004 im no exhaust expert, but i think they are talking bollox. I wouldnt go any smaller than OEM. if that means 2 x 2" or bigger then thats the way to go. Link to comment Share on other sites More sharing options...
Botang Posted October 9, 2004 Report Share Posted October 9, 2004 Doesnt sound right to me mate, if its better to have a single pipe dont you think Audi would have done it Did they fill you with the confidence EPS did with Sven and Me? I'll ask Toby for you later when I see him Link to comment Share on other sites More sharing options...
A8_Tony Posted October 10, 2004 Author Report Share Posted October 10, 2004 [ QUOTE ] Doesnt sound right to me mate, if its better to have a single pipe dont you think Audi would have done it Did they fill you with the confidence EPS did with Sven and Me? I'll ask Toby for you later when I see him [/ QUOTE ] Cheers Matt, be interesting to hear what Toby has to say.....must admit, I wasn't overly pleased with the advice.....but that's why I've posted this here.....maybe someone out there can shed some light. I'd have thought replacing with two 2" pipes straight through would have been the best option..? Link to comment Share on other sites More sharing options...
Botang Posted October 10, 2004 Report Share Posted October 10, 2004 I had a word for you, basically he goes along with my thoughts, wouldnt let them look at the car let alone touch it. There is some theory in what they are saying as the Y can* create a similar affect to the X in my system so could potentially give more mid range power as it will create that vacuum in the other pipe which is what the X achieves. However you notice my little *, can, i.e. if its exactly perfect, scientificly calculated, etc, etc. I doubt they will be going to this trouble will they Link to comment Share on other sites More sharing options...
A8_Tony Posted October 10, 2004 Author Report Share Posted October 10, 2004 Cheers for that Matt......they did say it would take them all day, and they've done lots of work on other large cars (Mercs, Bimmers, Range Rovers)....but I wasn't overly convinced. P.S.......one more post for you and you're at the magic 1K Link to comment Share on other sites More sharing options...
Tobes49 Posted October 10, 2004 Report Share Posted October 10, 2004 [ QUOTE ] Now these guys are telling me, that if I were to replace the middle silencer, and pipework with a 2 1/2" single pipe (with the required 'y' piece after the cats) that this would give me better performance, [/ QUOTE ] It MIGHT give you better mid range but will kill the top end power. [ QUOTE ] Now as the post title suggests, I'm no exhaust guru, but if I've got two 2" pipes, then that effectively gives me almost 4" of flow, whereas the 2 1/2" would only give me 2 1/2"..... [/ QUOTE ] Allmost but not quite right! An extra 1/4" around a 2" dia will give you far more area then just a 1/2" tube. But 2x2" doesn't give you 4" of flow. Back to school time! 2x2xpie gives you 12.56 12.56x2 (for twin pipes) gives 25.12 2.5x2.5xpie gives 19.625 So 2 2" pipes gives 25.12 flow area Single 2.5" Gives 19.625 flow area A single 4" gives 50 flow area Think you get the idea! What they mean is a single system is very easy for them to make! Link to comment Share on other sites More sharing options...
A8_Tony Posted October 10, 2004 Author Report Share Posted October 10, 2004 Cheers Toby, So you reckon they're just trying to fleece me then??? Apparently 2 1/2 inch pipe is bloody expensive too!?!? Best I find me another place to have a look at, before I insist on the trip to Holland Link to comment Share on other sites More sharing options...
Paul Posted October 10, 2004 Report Share Posted October 10, 2004 http://www.racecar.co.uk/btb/ make some cracking one off exhausts, but dont expect it to come cheap. if i was looking for a one off exhaust, id be looking towards them.. they make alot of race stuff, to stringent requirements. Link to comment Share on other sites More sharing options...
A8_Tony Posted October 10, 2004 Author Report Share Posted October 10, 2004 I don't mind paying the going rate, for good quality product, service and workmanship. What I do mind paying for, is the chance to give someone else a laugh at my expense. I don't like shoddy service, if I can give a good service (fnarr, fnarr) to my customers, then I expect it from companies where I'm expecting to spend my hard-earned. Thanks for the link Paul, I'll check them out. Link to comment Share on other sites More sharing options...
Botang Posted October 10, 2004 Report Share Posted October 10, 2004 That looks more like it, Otherwise it may be worth giving EPS a call and ask them what they can do without the car, I have posted a picture before of the A8 system up on a wall on display, Just try and find a skilled person to take on the fitting side of things. Roelf de Haan is the man you would need to speak to. EPS & USA Cars - Nieuwe Compagnie 23 - NL 9605PX Kiel Windeweer Tel: +31 598 350 335 - Fax: +31 598 320 402 www.uitlaten.com Link to comment Share on other sites More sharing options...
Tobes49 Posted October 11, 2004 Report Share Posted October 11, 2004 [ QUOTE ] Cheers Toby, So you reckon they're just trying to fleece me then??? Apparently 2 1/2 inch pipe is bloody expensive too!?!? [/ QUOTE ] Who said 2 1/2" pipe was expensive??? It price is inline with all other sizes? Link to comment Share on other sites More sharing options...
A8_Tony Posted October 11, 2004 Author Report Share Posted October 11, 2004 I think I might just steer well clear of this lot I wonder if they saw the A8, and thought 'Ah, simple one this, charge the earth for a poo job, he'll be back for more' Well unlucky guys, I shall be taking my business elsewhere Link to comment Share on other sites More sharing options...
cruiser647 Posted October 12, 2004 Report Share Posted October 12, 2004 Be careful on the 'getting it sent' bit, as Matt A8 is a pre-faceleift. Tony's is the facelift model. Not sure if there were any suble underbody changes to the exhaust mountings etc etc. So you might have to visit, rather than get one sent. Maybe Sven can help out here, as his is a facelift model................ Link to comment Share on other sites More sharing options...
A8_Tony Posted October 12, 2004 Author Report Share Posted October 12, 2004 If I get it from EPS, I shall make a weekend of it, no point getting it done over there if I can't take advantage of a weekend now is there Cheers for the concern tho' cruiser Link to comment Share on other sites More sharing options...
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