Guest adegnes Posted September 12, 2007 Report Share Posted September 12, 2007 anyone know how to change the rpm limit on the 505 turbo? with the extra injectors and controller fitted to my car I will need to raise/remove it, orelse when the L-jet cuts fuel, I'm afraid I'll melt some pistons... Quote Link to comment Share on other sites More sharing options...
V-M Posted September 12, 2007 Report Share Posted September 12, 2007 anyone know how to change the rpm limit on the 505 turbo? with the extra injectors and controller fitted to my car I will need to raise/remove it, orelse when the L-jet cuts fuel, I'm afraid I'll melt some pistons... There is some info on similar boxes http://www.alfagtv6.com/bb/viewtopic.php?p...99b118143ee96aa Br V-M Quote Link to comment Share on other sites More sharing options...
Guest adegnes Posted September 12, 2007 Report Share Posted September 12, 2007 There is some info on similar boxes http://www.alfagtv6.com/bb/viewtopic.php?p...99b118143ee96aa Br V-M Thank's! Found a link to this site http://home.swipnet.se/joakim_adolfson/lot...ction-text.html there. I'll have a look at my ECU Quote Link to comment Share on other sites More sharing options...
Guest vexu Posted March 12, 2008 Report Share Posted March 12, 2008 Thank's! Found a link to this site http://home.swipnet.se/joakim_adolfson/lot...ction-text.html there. I'll have a look at my ECU Here is my project in finnish, might help someone to remove rev limiter. Calculate R732 and R733 together, they are in series. I calculated 120k + 110k and put 47k in parallel with R733. Total resistance is now lower and rev limit raises. If your Pcb looks different check this out: http://www.205gti.com/bosch/ljet_drw.pdf Now you can find your resistor to change. Link below has also link to US version with lambda, for some reason resistance is different but place number is same. You must calculate resistors or try first 470k ohm. http://www.btcf.fi/forum/showthread.php?t=127547&page=2 Quote Link to comment Share on other sites More sharing options...
Bean Posted March 13, 2008 Report Share Posted March 13, 2008 Welcome to the forum Vexu! And thanks for the technical article links... Be curious to see what would be needed to change the ECU so it could use bigger injectors, or to trick it to dump more fuel... There's been mention of tweaks to the ECU that allowed more fueling so it'd be neat to see what the limits are. Adegnes - good luck! Looking forward on more progress on your car now that spring is around the corner... Rabin Quote Link to comment Share on other sites More sharing options...
Guest vexu Posted March 17, 2008 Report Share Posted March 17, 2008 Thanks! Topic in btcf forum is mine, it's BMW but has the same L-jetronic. I found some help from here, that's why i posted this info. There is no problem with bigger injectors, it works fine! Problem was rev limiter, caused a blown headgasket... System went too lean while cutting fuel. Modifications done: 2.0 block comp. ratio 8,1:1 346cc injectors from saab 9000 turbo (org. 175cc) FSE fuel pressure regulator AFM at pressure side (between int. manifold and intercooler) Afm spring tightened to work with bigger injectors Rev limiter raised to 7400rpm DIY Exh. manifold Intercooler and pipes / hoses Garrett T03 from Lancia delta HF integrale (exh. A/R .63, bigger comp wheel ~48mm ind.) Pictures maybe later... Only problem is cold start, too much richment. Lowering fuel pressure when really cold helps a little. This is a "racing" car so it doesn't matter so much. Hope chancing resistors solve this problem! Quote Link to comment Share on other sites More sharing options...
V-M Posted March 17, 2008 Report Share Posted March 17, 2008 Garrett T03 from Lancia delta HF integrale (exh. A/R .63, bigger comp wheel ~48mm ind.) Same hairdryier as I am using on my 505 V-M Quote Link to comment Share on other sites More sharing options...
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