pkn 20 Posted May 22, 2019 Report Share Posted May 22, 2019 I am confused When i start my car (2011 evora s with stock exhaust) I always press the sport mode button after a few seconds and I can instantly hear the exhaust get louder as the valve opens. This is on idle at around 900 rpm. Does the 2bular operate in a different way from the stock exhaust? I have a valved 2bular on order so would be good to know what is normal behaviour when I get it fitted. 1 Quote Link to post Share on other sites
mik 375 Posted May 22, 2019 Report Share Posted May 22, 2019 (edited) The valve is in the exhaust - the control system isnt. 2bular valve operation will be exactly the same as oem. My 2014 car does the same at idle : valve closed in normal mode, open in sports mode. But the valve closes when revs increase from idle and only re-opens in sports mode around 2300rpm. Edited May 22, 2019 by mik 1 Quote Link to post Share on other sites
pkn 20 Posted May 23, 2019 Report Share Posted May 23, 2019 Thanks Mik! Quote Link to post Share on other sites
Julian73 151 Posted May 24, 2019 Report Share Posted May 24, 2019 On 22/05/2019 at 16:42, mik said: The valve is in the exhaust - the control system isnt. 2bular valve operation will be exactly the same as oem. My 2014 car does the same at idle : valve closed in normal mode, open in sports mode. But the valve closes when revs increase from idle and only re-opens in sports mode around 2300rpm. My use of the word valve in my post may have been a bit confusing. As there are a number of places to pull the hose off I was referring to either plugging the hose or the 'valve' nipple, not the actuator valve on the muffler. Personally I would pull off th hose from both exhaust actuator and from the forward end at the SS line connection and fit a vacuum cap plug into the expose SS line, this method removed the hose from flopping around. Quote Link to post Share on other sites
woza 14 Posted May 30, 2019 Report Share Posted May 30, 2019 Seems a little strange that the valve is closed at low revs. As mentioned previously, I thought it was broken so sent it back. Surely sport should stay open at all times and non sport closed at all times..... W. Quote Link to post Share on other sites
Craig Red Evora 17 Posted June 5, 2019 Report Share Posted June 5, 2019 My 2010 S1 has the long ratio gearbox. At 70 MPH it is doing approx 1850 rpm in 6th gear, at those revs the flap is closed so it is a nice quiet cruise. That may be why they chose to close it until above 2300, with normal motorway speeds in the UK you don't have a droning exhaust. Craig. Quote Link to post Share on other sites
woza 14 Posted June 11, 2019 Report Share Posted June 11, 2019 On 05/06/2019 at 14:04, Craig Red Evora said: My 2010 S1 has the long ratio gearbox. At 70 MPH it is doing approx 1850 rpm in 6th gear, at those revs the flap is closed so it is a nice quiet cruise. That may be why they chose to close it until above 2300, with normal motorway speeds in the UK you don't have a droning exhaust. Craig. Makes sense. Quote Link to post Share on other sites
Reindeer 28 Posted September 9 Report Share Posted September 9 I'm dragging up old posts again! Apologies all. Did anyone try this in the end? Any downsides? I much prefer the throttle behaviour in normal but the exhaust noise in sport! Quote Link to post Share on other sites
Bravo73 1,263 Posted September 9 Report Share Posted September 9 Try what? Disconnecting the vacuum pipe? Yes, it’s easily done. The only downside is that the actuator might seize up after a while. Quote Link to post Share on other sites
mik 375 Posted September 10 Report Share Posted September 10 (edited) I also just came across this: https://www.komo-tec.com/en/lotus-exige/mk3-toyota-v6350380/exhaust/110/rc-exhaust-valve-control?c=495 although it is a bit short on information. I am guessing it includes a new valve actuatator and some wiring (and a plug for the existing vac pipe?) but only a fob is shown (?). Leave it open all the time, and use this to exercise the valve periodically..... Have messaged KT to ask, but it’s possible someone on here has already fitted one? Edited September 10 by mik Quote Link to post Share on other sites
Bravo73 1,263 Posted September 10 Report Share Posted September 10 1 hour ago, mik said: I also just came across this: https://www.komo-tec.com/en/lotus-exige/mk3-toyota-v6350380/exhaust/110/rc-exhaust-valve-control?c=495 although it is a bit short on information. I am guessing it includes a new valve actuatator and some wiring (and a plug for the existing vac pipe?) but only a fob is shown (?). I suspect that it is the same kit as this: https://www.elise-shop.com/eliseshopcom-electronic-valve-controller-kit-p-502725.html?zenid=a9664b43b1e32953a03913cbe661676a The fob is certainly identical. It is also much cheaper. 1 Quote Link to post Share on other sites
mik 375 Posted September 10 Report Share Posted September 10 Excellent sleuthing - I suspect you are correct. KT just responded to my enquiry about product contents and fitment instructions, but they said only “we send a wiring manual with the part”. Quote Link to post Share on other sites
Gold FFM Techyd 215 Posted September 10 Gold FFM Report Share Posted September 10 On 05/06/2019 at 14:04, Craig Red Evora said: My 2010 S1 has the long ratio gearbox. At 70 MPH it is doing approx 1850 rpm in 6th gear, at those revs the flap is closed so it is a nice quiet cruise. That may be why they chose to close it until above 2300, with normal motorway speeds in the UK you don't have a droning exhaust. I had a non valved 2bular and it droned below 2300rpm so I'd say that's exactly why it does it! Quote Link to post Share on other sites
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