GoldenGun 13 Posted July 25, 2020 Report Share Posted July 25, 2020 Hi, has anyone upgraded their exhaust from the standard 350 to the valved system from the 380? i currently have the 2bular non-valved track system on mine but miss the extra noise of open valves from my 380 test drive. I know it may fail track noise limits but mine will likely be used mainly/only on roads anyway. Quote Link to post Share on other sites
Kristof Thys 182 Posted July 25, 2020 Report Share Posted July 25, 2020 doable; you need to step up the piping diameter however. Either on the S-bend towards to back box or by also installing the 380 down/Y-pipe. 1 Quote Link to post Share on other sites
GoldenGun 13 Posted July 25, 2020 Author Report Share Posted July 25, 2020 Thanks! So if I buy the 380 silencer and down pipe, that should be a straight swap ? Quote Link to post Share on other sites
Bandit 18 Posted July 25, 2020 Report Share Posted July 25, 2020 No, the 350 and 380 downpipes are different sizes, you need to buy a custom link pipe so the 380 backbox will marry up to the 350 down pipe. Jim at 2bular will make you one. @Schnitzel had this done on his V6 Cup and it sounds great. 1 Quote Link to post Share on other sites
PJ 81 Posted July 25, 2020 Report Share Posted July 25, 2020 I have exactly the same issue and exhaust. According to Jim this would be your solution on great sound and swap: https://www.2bular.co.uk/exige-380/exige-v6-non-valved-70mm-track-system I have to wait a bit unfortunately to do this but he can build you one soon if you reach out to him. Is so, pls post how it came out! 1 Quote Link to post Share on other sites
GoldenGun 13 Posted July 25, 2020 Author Report Share Posted July 25, 2020 20 minutes ago, Bandit said: No, the 350 and 380 downpipes are different sizes, you need to buy a custom link pipe so the 380 backbox will marry up to the 350 down pipe. Jim at 2bular will make you one. @Schnitzel had this done on his V6 Cup and it sounds great. Yes, sorry I meant that I would need to buy a 380 downpipe as well as the silencer ? Quote Link to post Share on other sites
Schnitzel 26 Posted July 25, 2020 Report Share Posted July 25, 2020 1 hour ago, GoldenGun said: Yes, sorry I meant that I would need to buy a 380 downpipe as well as the silencer ? No 380 down pipe needed. You use the existing standard down pipe and simply ask Jim to make you the Link pipe, so that the back box can connect. Epic sound, but you probably won’t get on any tracks, other than Spa and the Nurburgring. The best modification you’ve can do, as it gives the car the drama it needs 1 Quote Link to post Share on other sites
GoldenGun 13 Posted July 25, 2020 Author Report Share Posted July 25, 2020 Thanks! just to clarify, do the 380 and 410 have the same valved silencer ? Quote Link to post Share on other sites
Kristof Thys 182 Posted July 25, 2020 Report Share Posted July 25, 2020 (edited) I was talking from a technical perspective... ideally YES you also need the 380 downpipe. It's 60mm diameter on both pipes compared to 51mm on your 350 system. So yes, Schitnzel is 100% correct, it will work with the 350 downpipe... but the 380 downpipe will yield (very) slight performance gains. However, the 380 back box (and indeed the same for the 4xx versions) is a pretty bizar design. At 76mm diameter not the best in terms of performance on the <380 engines with valve open and 48mm on the by-pass with valve closed. But again, just my .02 I do admit it sounds good (but too silent for me hence I went the custom route) Edited July 25, 2020 by Kristof Thys 1 Quote Link to post Share on other sites
GoldenGun 13 Posted July 25, 2020 Author Report Share Posted July 25, 2020 Thanks! And is the Komotec exhaust better in terms of design and performance? Quote Link to post Share on other sites
MAG 445 Posted July 25, 2020 Report Share Posted July 25, 2020 1 Quote Link to post Share on other sites
PJ 81 Posted July 25, 2020 Report Share Posted July 25, 2020 Hi Mark, these exhaust tips, did you get these from Komotec as well or..... I'd fancy them / or in titanium if you wouldn't mind sharing with me? They have the rolled end and yours have the same angle as the diffusor which looks great all together to me! Quote Link to post Share on other sites
GoldenGun 13 Posted July 25, 2020 Author Report Share Posted July 25, 2020 Think I saw the other video that explained the mods to add the larger tips. @Kristof Thys thanks a lot for the feedback. Is your car a 350 also ? Which custom system did you go for ? Quote Link to post Share on other sites
MAG 445 Posted July 26, 2020 Report Share Posted July 26, 2020 Tips were from a Chinese supplier on Ali Express called MZ speed store. You can choose the external diameter and the entry tube size. They cost about £80-£90 delivered. Turned up in about a week. Dan at HPE modified and fitted for an hour's labour. More info on my build thread 2 Quote Link to post Share on other sites
Kristof Thys 182 Posted July 26, 2020 Report Share Posted July 26, 2020 (edited) @GoldenGun I have Larini headers, Europipe sportcat and completely modified OEM valved back box (valve open= straight pipes, valve closed = absorption track). All in 63.5mm piping. I can control my valve independently from rpms so valve closed is "quiet" all over the rpm range. Valve open is... well...inferno Edited July 26, 2020 by Kristof Thys 1 Quote Link to post Share on other sites
GoldenGun 13 Posted July 26, 2020 Author Report Share Posted July 26, 2020 (edited) @Kristof Thys that sounds superb. May I ask, are you based in the UK ? Who did the install/work ? also, I know there is a button on the steering column for the valves, but the sport button also controls it ? Edited July 26, 2020 by GoldenGun Quote Link to post Share on other sites
Kristof Thys 182 Posted July 26, 2020 Report Share Posted July 26, 2020 @GoldenGun based in Belgium, all the installation done by yours truly (with moral support from DixieV6 who is the pioneer in the Lotus world in modifying Exige V6's since early 2013). Back box is built by a friend who sadly passed away. Sportcat was built by Europipe (as a favour, they only do Porsches... And are the best in the business!) Valve override is a simple +12v extra wire, switchable from the cabin. I can choose between 'normal operation' or override always open/always closed. No issue on back pressure as with the OEM boxes (and especially the 380 and onwards back boxes due to the very very small bypass pipe) because all is built in 63.5mm tubing. Added bonus: OEM look and no issue with (Belgian) MOT. 1 Quote Link to post Share on other sites
GoldenGun 13 Posted July 26, 2020 Author Report Share Posted July 26, 2020 I’m really sorry to hear of your friend’s passing. Your setup sounds very well constructed... wish I could persuade europipe to make a second SportCat! i would very much prefer to avoid the back pressure issues also. did you need to remap the car following the mods ? Quote Link to post Share on other sites
Kristof Thys 182 Posted July 26, 2020 Report Share Posted July 26, 2020 @GoldenGun the cat is easy. Just get a quality one eg. from HJS or Jim as he also uses HJS iirc. You can get the S-bend with cat pre made (also from Jim). Alternative Larini or others, have no experience with them. No remap needed. I also run a CAI. FYI: Dixie runs NO cats, cai, headers etc. Also here no remap needed, contrary to what you read sometimes on Lotus forums 1 Quote Link to post Share on other sites
E1EXG 29 Posted July 26, 2020 Report Share Posted July 26, 2020 I have changed my 350 exhaust to a 380 one. Its has brought my Exige alive i would recommend to anybody. Thanks Paul Quote Link to post Share on other sites
TonyKL 123 Posted July 26, 2020 Report Share Posted July 26, 2020 Do you track ? Quote Link to post Share on other sites
GoldenGun 13 Posted July 26, 2020 Author Report Share Posted July 26, 2020 I don’t plan to, and really loved the sound of the 380 that I drove. Quote Link to post Share on other sites
GoldenGun 13 Posted July 28, 2020 Author Report Share Posted July 28, 2020 On 26/07/2020 at 15:17, E1EXG said: I have changed my 350 exhaust to a 380 one. Its has brought my Exige alive i would recommend to anybody. Thanks Paul Hi Paul, did you install the 380 downpipe and silencer ? Quote Link to post Share on other sites
E1EXG 29 Posted July 29, 2020 Report Share Posted July 29, 2020 7 hours ago, GoldenGun said: Hi Paul, did you install the 380 downpipe and silencer ? Yes I believe it was the down pipe & silencer. It had totally transformed the car 1 Quote Link to post Share on other sites
PJ 81 Posted August 4, 2020 Report Share Posted August 4, 2020 If I were to get a new valved exhaust from Jim for my Exige S, would it be recommended to use the 380 valved road system or rather the 70mm valved road system for Supercharged? Looking for great performance and sound 'out of the box' solution. https://www.2bular.co.uk/exige-380/evora-400410-road-system https://www.2bular.co.uk/exige-s-v6/evora-s-70mm-diameter-valved-system Quote Link to post Share on other sites
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