mellonman Posted February 15, 2011 Share Posted February 15, 2011 Just a quick one but i think i can under stand the physics behind this question, i have a 2.5 decat with a 1.2 bar rr fitted but make about 1.05 i have now got stage 3 hybrids and using the boost controler to make 1.3 bar of boost the duty is set to about 50% for first turbo and up to about 70% for second, so forceing the turbos to make that boost wouldnt it be safer for the turbos for me to file out the rr to a larger size? the exhaust gas coming down the pipe is hitting the rr and causing terbulance in exhaust system thus would have a affect on spooling. well what im asking is should i file the ring out to make the boost controler duty more like 20% and 40% what are peoples veiws on this Quote Link to comment Share on other sites More sharing options...
Nic Posted February 15, 2011 Share Posted February 15, 2011 I'd leave it as it is and just use the EBC to up the boost. 1.3bar is high, do you have the fueling/mapping to support that? Do you have an EGT or AFR gauge fitted, running 1.3bar may cause dangerously high exhaust temps. Quote Link to comment Share on other sites More sharing options...
mellonman Posted February 15, 2011 Author Share Posted February 15, 2011 Sorry i should of stated i do have aem fic and afr gauge,650cc injectors,fuel preasure regulator Quote Link to comment Share on other sites More sharing options...
johnny g Posted February 15, 2011 Share Posted February 15, 2011 Leave as it is Quote Link to comment Share on other sites More sharing options...
mellonman Posted February 15, 2011 Author Share Posted February 15, 2011 i can see the point in leaving it being its not broken dont try to fix it, i just didnt like the ebc doing so much of the work and forcing the turbos to generate that preasure. i thought it would make the turbos make more heat and be under more strain? Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted February 15, 2011 Share Posted February 15, 2011 Deffo make more heat, what are your EGTs like? If you dont like it, turn the boost down Quote Link to comment Share on other sites More sharing options...
mellonman Posted February 15, 2011 Author Share Posted February 15, 2011 my afr at full beans is very rich 11.0, never really thought about turning it down just thought thats how hybrids where ment to be run lol Quote Link to comment Share on other sites More sharing options...
dude Posted February 15, 2011 Share Posted February 15, 2011 11:1 is not 'very rich' it is safe. You will make very little extra power if you run a leaner AFr and if you get some shit fuel your pistons will melt, my race car runs richer than that on some of its maps depending what its doing. Quote Link to comment Share on other sites More sharing options...
Scott Posted February 15, 2011 Share Posted February 15, 2011 I would always aim for 0.1 to 0.2 of adjustment for the boost controller to handle. If you are seeing 1.05bar with no boost control then I would possibly open it out very slightly until you were seeing 1.1bar and then use the boost controller to get up to 1.3bar. My RR currently nets me 0.9 which isn't enough IMO as my EGTs are way higher than they were before I fitted the RR (I was careful not to overboost). It's on my todo list Quote Link to comment Share on other sites More sharing options...
mellonman Posted February 15, 2011 Author Share Posted February 15, 2011 is the ebc duty normally as high as 70% if so then i will just leave it as it is Quote Link to comment Share on other sites More sharing options...
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