mellonman Posted September 4, 2010 Share Posted September 4, 2010 all i have a jspec tt been bpu for a while now but have a problem. it started with getting over boost at gear change 1.3 and when setting my avcr up to compensate have noticed the the duty was high so then thought today i would check what boost i was getting with it set to off and have found that the first turbo is only making 0.6 and at full boost 0.9 any hopes for me? Quote Link to comment Share on other sites More sharing options...
mellonman Posted September 5, 2010 Author Share Posted September 5, 2010 i think i have found the problem could it be this lol Quote Link to comment Share on other sites More sharing options...
Suprab1 Posted September 5, 2010 Share Posted September 5, 2010 They look sick Quote Link to comment Share on other sites More sharing options...
Geo Posted September 5, 2010 Share Posted September 5, 2010 that looks like one gubbed turbo Quote Link to comment Share on other sites More sharing options...
Carl Posted September 5, 2010 Share Posted September 5, 2010 My turbos looked like that when I removed them although I never felt any real boost issues other than it was a bit later getting to full boost. Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 10, 2010 Author Share Posted December 10, 2010 yes i can confirm that the turbos like that would not affect boost, as i have now fitted stage 3 hybrid and still am having this problem,could anyone help me please i have changed all vacume pipes, is my engine end? Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted December 10, 2010 Share Posted December 10, 2010 Good god, what happened to those? Did you find out? What induction system are you running? Exhaust system? Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 10, 2010 Author Share Posted December 10, 2010 avcr over boost is what killed them, i was running a hks panel filter but it had a split pipe,cat back trd replica and no cats, i have now replace turbos and changed to blitz panel filter and new pipe, my exhaust seems to be quieter if that helps Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted December 10, 2010 Share Posted December 10, 2010 Maybe the EGBV is siezed/ the vsv not working? Tried it in TTC mode? Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 10, 2010 Share Posted December 10, 2010 I imagine it was the HKS filter that killed them, the blades look eroded and it's fairly mangy in there, things should be pretty clean in the intact tract apart from oil from the PCV system. Are you seeing normal boost on the first turbo? Is it only once the second comes online that you don't get past stock boost? How have you gone BPU? Quote Link to comment Share on other sites More sharing options...
Scott Posted December 10, 2010 Share Posted December 10, 2010 Are the decats both 3"? I only hit 1.0bar with a 1.2bar restrictor ring in place. When you say hybrids, do they have the UK wastegates? Have you tried using the AVCR to up the boost or are you trying it without any boost control? Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 10, 2010 Share Posted December 10, 2010 Also, is this a change, i.e. did it used to work ok and now it only reaches stock boost, or has it always been like this? Your first post reads like it always behaved so, in which case perhaps just tune the boost controller to make 1.2bar instead of 1.3? Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 11, 2010 Author Share Posted December 11, 2010 first turbo 0.7 then second 0.9 about 5000rpm maybe due to hybrid!, the first cat is 2.5 and then 3 with cat back im not sure if it always done it as had he avcr before i went bpu when i turn up the avcr the car seens good as gold but just had a aem fic with 650 injectors and fuel rail hoping this would help but have had some problems they say it was gonna det at 1.2 @390 bhp but the had no o2 fitted and had not wired in the wide band i have they still had the hks fcd wired in does it look like my engine is shot it sounds sweet Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 11, 2010 Author Share Posted December 11, 2010 (edited) Are the decats both 3"? I only hit 1.0bar with a 1.2bar restrictor ring in place. When you say hybrids, do they have the UK wastegates? Have you tried using the AVCR to up the boost or are you trying it without any boost control? yeah i am doing this without avcr on, when its on all is normal or so i thought till the mapper said it was gonna det at 1.2 but i had been running that for the last 2 months before it was half mapped by him and still has jspec waste gates Edited December 11, 2010 by mellonman (see edit history) Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 11, 2010 Author Share Posted December 11, 2010 (edited) Maybe the EGBV is siezed/ the vsv not working? Tried it in TTC mode? tryed in ttc and was the same just some looooonnneeeey lag i made sure the egcv was free they are had to move anyway right due to spring tension, the egbv vsv is bypass due to avcr The egbv is the no2 waste gate right? Edited December 11, 2010 by mellonman (see edit history) Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted December 11, 2010 Share Posted December 11, 2010 No the EGV brings the number 2 turbo online Quote Link to comment Share on other sites More sharing options...
Scott Posted December 11, 2010 Share Posted December 11, 2010 Having the cat in will hold your boost back and leave you with extremely high EGT's if you use the boost controller to go past it. Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 11, 2010 Share Posted December 11, 2010 Your engine isn't shot It won't det at 1.2bar as long as everything (fuel system, ignition etc) is working properly - hundreds of people run 1.2bar BPU on a daily basis. Turning off the AVCr causes lag as there is no clever boost control any more - the wastegate creeps open as boost pressure rises. It won't limit maximum boost but it does slow production of it. The stock valve that stops wastegate creep is bypassed in the installation of the AVCr. Your first decat of 2.5" might be the restriction. Different cars behave different ways for some reason, which is why the restrictor ring size is always a bit of a dark art. Quote Link to comment Share on other sites More sharing options...
Scott Posted December 12, 2010 Share Posted December 12, 2010 Your engine isn't shot It won't det at 1.2bar as long as everything (fuel system, ignition etc) is working properly - hundreds of people run 1.2bar BPU on a daily basis. Turning off the AVCr causes lag as there is no clever boost control any more - the wastegate creeps open as boost pressure rises. It won't limit maximum boost but it does slow production of it. The stock valve that stops wastegate creep is bypassed in the installation of the AVCr. Your first decat of 2.5" might be the restriction. Different cars behave different ways for some reason, which is why the restrictor ring size is always a bit of a dark art. He has a 2.5" decat? I read that he has a CAT pipe in place, as i aksed him specifically. Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 13, 2010 Author Share Posted December 13, 2010 He has a 2.5" decat? I read that he has a CAT pipe in place, as i aksed him specifically. scott i have no cats first de cat is 2.5 and second is 3 Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 13, 2010 Author Share Posted December 13, 2010 Your engine isn't shot It won't det at 1.2bar as long as everything (fuel system, ignition etc) is working properly - hundreds of people run 1.2bar BPU on a daily basis. Turning off the AVCr causes lag as there is no clever boost control any more - the wastegate creeps open as boost pressure rises. It won't limit maximum boost but it does slow production of it. The stock valve that stops wastegate creep is bypassed in the installation of the AVCr. Your first decat of 2.5" might be the restriction. Different cars behave different ways for some reason, which is why the restrictor ring size is always a bit of a dark art. great good explaination about turning off the avcr, looks like a file and the restictor ring will be having a chat Quote Link to comment Share on other sites More sharing options...
Scott Posted December 13, 2010 Share Posted December 13, 2010 scott i have no cats first de cat is 2.5 and second is 3 Ahh, you said the first CAT was 2.5" The smaller diameter decat pipe will lower the pressure a little. I think the restrictor rings are designed for use in a 3" straight through system so anything less than that will require a little modification. I would suggest aiming for 1.0bar in low gears and 1.1bar in higher gears (Without the boost control on). That way you will keep your EGTs down while not having to worry about boost spikes. Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 13, 2010 Share Posted December 13, 2010 OK I've been reading your other thread and as I've pointed out there, you have a lot of unresolved issues with the car including detonation problems. Stop chasing power, BPU, or even giving the car any sort of abuse until you've fixed them. Let me re-iterate this part of my "your engine isn't shot" comment: "It won't det at 1.2bar as long as everything (fuel system, ignition etc) is working properly" Sounds like it isn't. Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 14, 2010 Author Share Posted December 14, 2010 OK I've been reading your other thread and as I've pointed out there, you have a lot of unresolved issues with the car including detonation problems. Stop chasing power, BPU, or even giving the car any sort of abuse until you've fixed them. Let me re-iterate this part of my "your engine isn't shot" comment: "It won't det at 1.2bar as long as everything (fuel system, ignition etc) is working properly" Thanks for taking the time to look ian this thead was started some time back before i had aem fitted just revived it to see if i could get any ideas on if i have a problem or if it was normal to get them figures with avcr off and looks like that is all normal so im happy there Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.