vickiw106 1 Posted February 25, 2008 this question has probably been asked and answered before,but here we go anyway i am currently building 1.6 205gti rally car it has a group a head and i am going to run twin 40s had anyone got any thoughts on whats the best exhaust system to use there is a lot of rumours going around that the standard systems are the best any thoughts would be good thanks ian Share this post Link to post Share on other sites
welshpug 1,661 Posted February 25, 2008 IMHO DES Developments, proven in rallycross no less fairly local to you to boot Share this post Link to post Share on other sites
dave_gti 0 Posted February 25, 2008 IMHO DES Developments, proven in rallycross no less fairly local to you to boot i agree with the above, thats what im going to get in a couple of months Share this post Link to post Share on other sites
base-1 17 Posted February 26, 2008 (edited) Ashley or PTS Group N. Both cheap and designed to be replaced relatively often - which you will need to do if you're rallying. Don't waste your money on fancy stuff that will get battered and ruined, spend the money on driver training instead. Quick edit - I have no idea how much the DES exhaust is, but from what I've heard about some of them, they aren't cheap. Rallycross is GREAT, but it doesn't quite take the same toll as normal rallying does on something like an exhaust. Edited February 26, 2008 by base-1 Share this post Link to post Share on other sites
Coonper 0 Posted February 26, 2008 (edited) I have an ashley system on my saxo vtr. Its a very good bit of kit. Gave good gains and smoothed out the power. Then theres the sound they make... Edited February 26, 2008 by Coonper Share this post Link to post Share on other sites
Craigb 2 Posted February 26, 2008 if you are running carbs and a group A head , then there will be a benefit in running a 4 branch manifold , I have no experience of the DES one , but the Longman/maniflow one certainly has proven results. The system that you fit to the manifold, is then a bit of a compromise , between cost, power output, noise , and how long it will stay on the car . A stainless system will take the knocks better , so long as you mount it correctly, the GPn system is a compromise as it is a little cheaper , but not as hard wearing . Personally i have a poweflow that has been modded to make it repackable , and that has been on the car for 5 years of derbyshire whites. Share this post Link to post Share on other sites
andychalmers 0 Posted February 26, 2008 Ian, you have loads of options really. Depends on what type of rallying you are doing, your budget, engine power & how competitive you are. I've been rallying for 6 years consistantly in a championship with many class wins. I originally used a Peugot sport group N system, these were very cheap, like from memory about £35 for back box & £15 on the centre pipe section with no centre box, not seen them for sale for a long time tho. These were ok but very thin, you could easily dent & crumple the system but cheap to replace however once dented they loose you power so no good if you were fighting for a win. Standard systems seem too restricted even on standard cars. If you put to big a exhaust tube diameter on, you loose power especially lower down the revs where you need it. Another thing to consider is the fitting of it, on a rally car you need it tucked up as best you can out of the way. In the end I went to a custom exhaust fabricator to have one custom made, its very thick stainless steel so never dents and lasts years. From memory a standard exhaust is 1 7/8th Jesus im thinking back 5 + years, and the best size I seem to remember is 2 1/4 inch, for a mildly tuned GTI, going upto 2 1/2 inch for a group A rally system. If your in the forrests you need a good exhaust, tarmac its not such a big deal untill you go off . Last but not least Id reccommend using rubber mounts rather than solid mounts as the vibrations from the car seem to break off the solid mounts. I also fit split pins to hold the mounts on the brackets. Bit long winded but hope it helps. Andy Share this post Link to post Share on other sites
Coonper 0 Posted February 26, 2008 I originally used a Peugot sport group N system, these were very cheap, like from memory about £35 for back box & £15 on the centre pipe section with no centre box. £50 for a group N system??? Where can i get one?!?!?! Share this post Link to post Share on other sites
boombang 2 Posted February 26, 2008 The PTS systems are somewhat more expensive than they used to be, I recall picking one up years back for around £115 all in. Think they are nearer the £200 mark now... Share this post Link to post Share on other sites
