Flip Posted December 28, 2007 Share Posted December 28, 2007 At the moment I am running BPU in my J-spec with an AEM boost controller on the second turbo, making me around the 1.2bar mark, giv e or take. However on the first turbo I guess it makes around 0.8bar, all fairly normal. I find the transition from one to two is quite a jump, and this is great fun some of the time, but a little smoother would be nice (like it is with the boost controller off, bringing the second turbo level down to nearer 1bar in the summer). I am wondering if I might be able to pop a manual boost controller on the first turbo, and raise it to 1bar, thus making the transition from 1 to 2 a bit smoother, and giving me more power into the bargin. I've found posts where people have done this, but with no replies from the experts. Before I go playing, I wanted to know what people think on this, and also what is a sensible/safe level for the first turbo. Link to comment Share on other sites More sharing options...
tucky40 Posted December 28, 2007 Share Posted December 28, 2007 Very interested to hear the opinions on this. Link to comment Share on other sites More sharing options...
Thorin Posted December 28, 2007 Share Posted December 28, 2007 It is possible, I think there used to be an article on mkiv.com but I'm too lazy to go search for you. I think Ian C may have done this once upon a time (back when he was still on hybrids) but I may be mistaken. Link to comment Share on other sites More sharing options...
Thorin Posted December 28, 2007 Share Posted December 28, 2007 This might have been what I was thinking of on mkiv.com http://mkiv.com/techarticles/ebv/ebv.htm Link to comment Share on other sites More sharing options...
Flip Posted December 28, 2007 Author Share Posted December 28, 2007 Ah ok thank you, I was looking as well... That EBV article doesn't sound too good for the second turbo though... I thought you might simply be able to put in a boost controller or a manual bleeder in the first turbo's wastegate setup, much like you do for the second one, then you can just "wind it up" a bit to match the increase in the second one, and hey presto, smoother transition? Link to comment Share on other sites More sharing options...
Thorin Posted December 28, 2007 Share Posted December 28, 2007 I thought you might simply be able to put in a boost controller or a manual bleeder in the first turbo's wastegate setup, much like you do for the second one, then you can just "wind it up" a bit to match the increase in the second one, and hey presto, smoother transition? You can, and I know people have set say first turbo to 1.0bar then 1.2bar when the second comes on-line. How it's all plumbed together I have no idea! Drop Ian C a PM perhaps? Link to comment Share on other sites More sharing options...
Wez Posted December 28, 2007 Share Posted December 28, 2007 Prob not much use to you but I did this when running the stock turbos with the AEM, all software controlled. Was also able to smooth the transition out as you can control when each VSV is activated. Link to comment Share on other sites More sharing options...
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