Jorge- Posted February 11, 2010 Report Share Posted February 11, 2010 Simple yes or no. Going to Colin for a remap next month. Got the K&N panel filter, just thinking about the exhaust pre-map. For the price of a cat back system, and the power gains, I won't be doing it. So, Straight pipes (either backbox or resonator delete, not both) will they aid the remap, or do they just make noise? Link to comment Share on other sites More sharing options...
mit Posted February 11, 2010 Report Share Posted February 11, 2010 No, especially if you plan on losing some of your catalytic converters (which will mean MOT failure). Link to comment Share on other sites More sharing options...
Jorge- Posted February 11, 2010 Author Report Share Posted February 11, 2010 No, I said just resonator or backbox removal. so not technically straight, but a straight replacement section. Link to comment Share on other sites More sharing options...
mit Posted February 11, 2010 Report Share Posted February 11, 2010 I doubt whether you'll get any improvement on any changes behind the cats, other than louder noise? Link to comment Share on other sites More sharing options...
autosri Posted February 11, 2010 Report Share Posted February 11, 2010 You get no power from removing the resonator is purley noise Link to comment Share on other sites More sharing options...
Jorge- Posted February 11, 2010 Author Report Share Posted February 11, 2010 Thats cool, it can wait then, just didn't want to do it 6months done the line after a remap.. when it could have helped the remap initally. Link to comment Share on other sites More sharing options...
mit Posted February 11, 2010 Report Share Posted February 11, 2010 I don't even think the remap is worth it! If Colin could remap my car first and let me try it out compared to the one I already had, I'd be happy to hand over £200 if I thought it made a difference. Link to comment Share on other sites More sharing options...
Jorge- Posted February 11, 2010 Author Report Share Posted February 11, 2010 I am prepared to risk it, plus its going on a Dyno a week Saturday, and will go on again afterwards so can see actually changes across the rev band. Link to comment Share on other sites More sharing options...
mit Posted February 11, 2010 Report Share Posted February 11, 2010 Aah, live maps are different, as they are customised for your engine! Link to comment Share on other sites More sharing options...
Jorge- Posted February 11, 2010 Author Report Share Posted February 11, 2010 Colins arent live, but they arent generic either. On the road maps... Link to comment Share on other sites More sharing options...
autosri Posted February 11, 2010 Report Share Posted February 11, 2010 I wouldn't have though colins generic map would help with things like exhausts and filters as far as I know it's only a live map that does that Link to comment Share on other sites More sharing options...
mit Posted February 11, 2010 Report Share Posted February 11, 2010 I wouldn't have though colins generic map would help with things like exhausts and filters as far as I know it's only a live map that does that Yep! Link to comment Share on other sites More sharing options...
Jorge- Posted February 11, 2010 Author Report Share Posted February 11, 2010 If it was a generic map, it wouldn't take 1-2hours, it would take 10minutes! Link to comment Share on other sites More sharing options...
mit Posted February 11, 2010 Report Share Posted February 11, 2010 Actually my generic map took a couple of hours too. It takes absolutely ages to write it to the EPROM on the ECU (or wherever it gets written to). Link to comment Share on other sites More sharing options...
Jorge- Posted February 11, 2010 Author Report Share Posted February 11, 2010 Taken from a message from Colin: All of our software is Individual to each car & not generic files Link to comment Share on other sites More sharing options...
pj1985 Posted February 12, 2010 Report Share Posted February 12, 2010 Some wrong info in this thread. Firstly a generic map can take advantage of other upgrades such as induction, exhaust etc etc. It is not just live maps that can do this. That is why many mappers will offer different stages of map. Stage 1 standard, Stage 2 uprated induction and exhaust, Stage 3 totally custom for other things such as throttle bodies/forced induction etc etc. It does not takes ages for the ecu to be reflashed. Standard load and go for an ecu flash remap does only take minutes. No more than about 15mins at the very most unless there are issues such as read permissions, the writing failing etc. The files are not very big at all, were talking mb not gb here. What takes most time for a generic map is checking for any faults before hand as remapping a car with underlying problems isnt best practice and after the reflash any logging etc after to check everything is working as it should do and the map has taken properly. Link to comment Share on other sites More sharing options...
Jorge- Posted February 12, 2010 Author Report Share Posted February 12, 2010 Think I will just PM Colin, nobody seems to have much of a clue Link to comment Share on other sites More sharing options...
autosri Posted February 12, 2010 Report Share Posted February 12, 2010 Straight pipes won't improve performance it's just noise Link to comment Share on other sites More sharing options...
Richy_Boy Posted February 12, 2010 Report Share Posted February 12, 2010 Saving the original map takes ages from my experience.. writing a new map - minutes. I wouldn't bother with the exhaust, unless you're putting sports CATs in place, uprated manifolds and the works... Rich Link to comment Share on other sites More sharing options...
Sticklin Posted February 12, 2010 Report Share Posted February 12, 2010 If it doesnt do anything for performance, but makes an all mighty noise, then i say get the straight pipes! After doing the resonator delete on mine, I still want more noise But, Is a straight through exhaust good for the car? with back pressure and all that. (i have no clue about any of it) If anyone can give some detailed advice, it would be much appreciated. Rob. Link to comment Share on other sites More sharing options...
chris Posted February 12, 2010 Report Share Posted February 12, 2010 If it doesnt do anything for performance, but makes an all mighty noise, then i say get the straight pipes! After doing the resonator delete on mine, I still want more noise But, Is a straight through exhaust good for the car? with back pressure and all that. (i have no clue about any of it) If anyone can give some detailed advice, it would be much appreciated. Rob. BMW's are very tricky when it come to exhausts, well thats always what ive been lead to believe anyway. Saw an old E36 328 with straight pipes on, sounded lovelly but he lost something stupid like 30bhp! Think thats why the do the X pipes (cat replacements), so the back pressure is still there, and getting rid of everything i.e. resonator and cats, and a performance backbox could destroy the power. I have not played with the exhaust side enough to comment, but people who have done it always winge of less power (E36 anyway). Link to comment Share on other sites More sharing options...
Jorge- Posted February 12, 2010 Author Report Share Posted February 12, 2010 Yeah, I had a straight pipe with backbox on my saxo, with the cat removed too, and the loss of power was stupid. Put the standard back on it felt so much more responsive, hence why i'd only ever do one or the other, probs the backbox if I can get some nice stainless tips, but if it doesn't help performance at all, i wont bother for a while yet. I know straight exhausts help on turbos, just on none turbos the loss of pressure causes a loss in power. I have had a noisy car, I want more pure power now. Link to comment Share on other sites More sharing options...
paul46rider Posted February 12, 2010 Report Share Posted February 12, 2010 if you know a firendly MOT place and the remap is to suit, go for it. i'm hoping to decat and fit a non res x-pipe to my m3 this year to go with the eisenmann race box. then evolve are gonna have a play with it Link to comment Share on other sites More sharing options...
autosri Posted February 12, 2010 Report Share Posted February 12, 2010 when i was reading up about the resonator delete the americans kept mentioning glass packs and from what i read the keep back pressure but dont stop the noise so best of both worlds i dont know how true it is or if they are even available over here but worth looking into Link to comment Share on other sites More sharing options...
chris Posted February 12, 2010 Report Share Posted February 12, 2010 if you know a firendly MOT place and the remap is to suit, go for it. i'm hoping to decat and fit a non res x-pipe to my m3 this year to go with the eisenmann race box. then evolve are gonna have a play with it Cant wait for that! X pipes are superb on M3's. Think supersprint first did it, and the sound is still as good iirc when i was reading up about the resonator delete the americans kept mentioning glass packs and from what i read the keep back pressure but dont stop the noise so best of both worlds i dont know how true it is or if they are even available over here but worth looking into Never heard of this, but would be interested to see wtf it is Link to comment Share on other sites More sharing options...
