b18beans Posted August 20, 2009 Share Posted August 20, 2009 jus wapped on the new exhaust, adj. decat an manifold, and although it looks good, it seems to have developed a bit of a flat spot. obviously not ideal. anyone any ideas why?cheers, beans... Link to comment Share on other sites More sharing options...
Guest VTI-S Posted August 21, 2009 Share Posted August 21, 2009 Hi, what revs does the flatspot occur at? Which system have you gone for? Link to comment Share on other sites More sharing options...
b18beans Posted August 21, 2009 Author Share Posted August 21, 2009 its a mongoose cat back system, funkypower adjustable decat and 4-1 manifold.the flat spots quite low down, bout 2.5, 3 ish. will get a definate number once ave been back out tonight... Link to comment Share on other sites More sharing options...
Moe Posted August 21, 2009 Share Posted August 21, 2009 what make is the manifold Link to comment Share on other sites More sharing options...
slosei Posted August 21, 2009 Share Posted August 21, 2009 what i found that helped was to reset the ecu, i unplugged mine for 20min,it would be easyer to disconnect the power cable to the battery or take out a fuse(dont know which one)it will reset the ecu as you have changed the characteristics of the exhaust flow and the scavenging effect( http://en.wikipedia.org/wiki/Scavenging_(automotive) ) has also changed so in theory you would need to add a bit more fuel to compensate it,hope this helpsZak Link to comment Share on other sites More sharing options...
b18beans Posted August 23, 2009 Author Share Posted August 23, 2009 went out and the flat spot (S!) are at 2500rpm, and at 7000rpm. also, the vtecs arent as noticeable (because its louder in general?), and it doesnt like it on 2nd vtec. takes a bit of a dip at 6 then carrys on up to 8200. tried unpluggin the battery but may not have left it long enough, will take it off today while the f1's on an try again.manifold is a funkypower ss 4-1, de-cat is also funkypower, exhaust is mongoose cat back... Link to comment Share on other sites More sharing options...
SteveMB6 Posted September 18, 2009 Share Posted September 18, 2009 I also have a flat spot at 2500 -3000 rpm, i have a standard manifold an aftermarket cat and mongoose system, and its really quite noticable, doesnt happen all the time tho Link to comment Share on other sites More sharing options...
b18beans Posted September 21, 2009 Author Share Posted September 21, 2009 I also have a flat spot at 2500 -3000 rpm, i have a standard manifold an aftermarket cat and mongoose system, and its really quite noticable, doesnt happen all the time thomines were caused by insufficient oil levels mate, dint realise quite how much they get thru!! topped it back up an away we go! Link to comment Share on other sites More sharing options...
SteveMB6 Posted September 21, 2009 Share Posted September 21, 2009 my oil levels are fine as its just been serviced, mine does it mostly whan cold Link to comment Share on other sites More sharing options...
jalesi2001 Posted September 21, 2009 Share Posted September 21, 2009 my oil levels are fine as its just been serviced, mine does it mostly whan coldYou do know VTEC dont work when its cold yeah? Not trying to sound like a know it all by the way!! Link to comment Share on other sites More sharing options...
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