Doof 11 Posted July 23, 2008 I've got a maniflow 4-2-1 manifold going into a 2.5inch exhaust system for my new S16 engine but dont know where the lambda sensor should go...i've read about it going quite far back, only a couple of feet from the tailpipe...but surely at that point the sensor would lag behind what the engine is really doing? I would have thought just after the pipes finally join into 1...it'd make wiring easier too... I have an innovate LC-1 which is heated so i suppose putting it far back shouldn't matter from a temperature point of view as it'll heat itself up to the correct temp... Thoughts anyone? Lewis Share this post Link to post Share on other sites
welshpug 1,661 Posted July 23, 2008 (edited) I would have thought just after the pipes finally join into 1...it'd make wiring easier too... precisely that heres a pic of a maniflow coincidentally, you can see the bung just before the centre section join http://www.track-monkey.co.uk/images/2058v...all/engine4.jpg Edited July 23, 2008 by welshpug Share this post Link to post Share on other sites
Daz_C 8 1 Cars Posted July 23, 2008 I fitted the one I had just before the centre box where the tunnel is wider so it could be fitted at 10 o'clockish without it causing the wire off the sensor to be kincked. Then routed the wiring and LC-1 under the heatshield to the front of the car and into the cockpit where the original engine loom comes through. There's plenty of cable left over to go further back if you wanted. I took mine out/off this evening as its surplus to requirments now. Share this post Link to post Share on other sites
taffycrook 2 Posted July 29, 2008 It is thought that 30 inches is about right. Not too close so it gets too hot, yet close enough to be heated by the exhaust gas temps. Share this post Link to post Share on other sites
NeilGTi85 5 Posted July 30, 2008 On my recently brought GTi-6 conversion the Lambda is in the downpipe bend Seems to be working though..... Neil Share this post Link to post Share on other sites
rex 1 Posted July 30, 2008 (edited) On my recently brought GTi-6 conversion the Lambda is in the downpipe bend Seems to be working though..... Neil That's where it is on the standard down-pipe on the GTi 6 conversion I'm doing. The lamda on the CT turbo engine was a lot further away, probably due to heat from the turbo itself.. Edited July 30, 2008 by rex Share this post Link to post Share on other sites
welshpug 1,661 Posted July 30, 2008 It is thought that 30 inches is about right.Not too close so it gets too hot, yet close enough to be heated by the exhaust gas temps. I know that they don't like being too close, but as far as I am aware all Peugeot/Citroen Lambda sensors have heater elements so the distance wouldn't affect them that much, though I don't think many would be much further than 30" anyway! Share this post Link to post Share on other sites
tom_m 0 Posted July 30, 2008 its also worth noting that the optimum position in the exhast wall is somewhere between 30 and 90 degrees looking at the exhaust in cross section with 0 being at the top. in practice this may be quite hard to achieve on a 205 Share this post Link to post Share on other sites
bales 1 Posted July 30, 2008 Bit off topic I know, but how much power will your engine be running as thats a pretty large bore unless it is going to be making well over 200+bhp My turbo is only 2.5" all the way through Share this post Link to post Share on other sites
Doof 11 Posted July 30, 2008 (edited) To be honest i'm guessing on the bore size, i'm hoping for 205+bhp so even if it is that size it should be ok...in fact i might go and measure it... EDIT - Its 2.25 Edited July 30, 2008 by Doof Share this post Link to post Share on other sites
