CarlT67 Posted April 25, 2009 Share Posted April 25, 2009 I have replaced my knackered Kakimoto exhaust for a lovely Carbon HKS and after fitment I am now hitting .9bar (and 1bar in the top of third) when both turbos are online. There is also much more of a kick when the second turbo comes online. Before I was getting close to the stock values of just under .8 unless it was really cold. The previous exhaust was obviously more restrictive and this one flows much better. My question is, will this be dangerous to continue to run under these conditions, both cats are still in and its all standard as far as the engine is concerned. Also should I have hit fuel cut when it reached 1 bar...? I am worried about overheating and running lean. Quote Link to comment Share on other sites More sharing options...
bignum Posted April 25, 2009 Share Posted April 25, 2009 Sounds like you need to take the bpu steps now, getting the cats off is the 1st thing to keep the temps down, there`s lots about bpu in faq. Quote Link to comment Share on other sites More sharing options...
CarlT67 Posted April 25, 2009 Author Share Posted April 25, 2009 Yeah, I want to go bpu after my mot next month. I just want to know what the situation is in the mean time. Quote Link to comment Share on other sites More sharing options...
dan4 Posted April 25, 2009 Share Posted April 25, 2009 You will hit boost cut if 1bar is held for enough time My bet is you have a boost leak to a vsv/actuator thats gradually getting worse, if you have both cats in exhaust change should matter imho Quote Link to comment Share on other sites More sharing options...
CarlT67 Posted April 26, 2009 Author Share Posted April 26, 2009 You will hit boost cut if 1bar is held for enough time My bet is you have a boost leak to a vsv/actuator thats gradually getting worse, if you have both cats in exhaust change should matter imho So I should check/replace all the vacuum hoses to the vsv's, but its strange how it changed at exactly the same time. Also I know the vsv's control when the turbos come it, but how do they decide boost levels..? Quote Link to comment Share on other sites More sharing options...
bignum Posted April 26, 2009 Share Posted April 26, 2009 So I should check/replace all the vacuum hoses to the vsv's, but its strange how it changed at exactly the same time. Also I know the vsv's control when the turbos come it, but how do they decide boost levels..? They don`t, the wastegate actuator does. Quote Link to comment Share on other sites More sharing options...
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