been looking at exhausts, and find that comments are often made about that exhaust needing a remap. Coz it could cause bad running or even engine damage? What I'd like to know, is how much difference does it make, it's only an exhaust which lets combustion out? I know it changes the sound, but how much could it make to running and engine damage, or is it just scare mungering?
Hi TB in my experience if you only change the exhaust and if it still has it's DB reducer still in it, then you really can 'have your cake and eat it' without a remap. However, if you start to run without baffles and change anything on the inlet side - such as a high flow air filter - then you start to get into re-mapping territory because the composition of the engine and it's running parameters are changed. The other reason why some peeps re-map is that the bike - all new bikes - are set up at the factory to run as lean as possible, to pass emission levels. This means they are not optimised for performance.
The standard cans on a 16 are so good that a change of cans or can make very little difference, i fitted the low pipe more for looks as for mapping all of the top can manufactures state its not req
The exhaust is a critical part of the engine setup. Any change will effect the running of the engine, however, depending on the exhaust in question those changes can be anywhere from minimal to a total alteration of the setup. Some aftermarket manufacturers specialise in more noise without needing a remap while others will need a re-map. I fitted aftermarket Brituro silencers, or rather louders, to my T100 and as well as sounding like a Bonny should they also made a hell of a difference to the running. I was expecting to do an ECU re-map to eliminate the popping and back firing on overrun but a pre re-map test ride highlighted other issues. There was a flat spot at very low revs requiring extra throttle to get moving and another flat spot at 50-70mph. I downloaded the free and totally excellent TuneECU onto my laptop and loaded the Triumph toga map, about 20mins start to finish. Immediately the benefits were obvious, smooth throttle response from tickover through the entire range. No flat spots anywhere enabling moving off at tickover if required, handy in traffic and smooth power delivery through the range including 50-70mph. Over time I shall probably make some further changes to the mapping as my understanding of how it all works improves but for an out of the box solution the toga map was a great place to start.
Agree with the biglad - if you are running your new pipe(s) with baffles in and mainly for normal riding you won't need a remap. If you run it with the baffle out and cane the bloody thing then I think it is likely that the bike would benefit from a remap. However as Mr Toad said above this is not hard with Tune ECU software and there is plenty on this forum about this. My Tiger has a Leo Vince pipe fitted but I run it with the baffle in so no remap required. The bike runs perfectly well through the rev range with no flat spots and I am quite happy with it. The Bonnie has just been fitted with TORs by the dealer and they did the remap at the same time. Apart from the fantastic sound, the bike has smooth throttle response all the way through the rev range, no flat spots and feels like it has slightly more power and is a joy to ride. (especially in conjunction with my upgraded suspension front and back).
