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Discussion Starter · #1 ·
I'm looking at fitting a bleed valve to the actuator vacum hose, in order to up the boost (& hopefully BHP!). Has anyone tried this? I know some cars with electronic servo controlled actuators can't use a bleed valve, but does anyone know if my car would have this kind of system, or does it have a conventional type?<br>The car is a 2002 S60 2.0t SE, 98k, currently running at 0.4 Bar of boost on my aftermarket boost guage. It also has a K&N induction kit. <br>Also, what kind of boost would be safe to take it up to? I'm thinking about 0.6 bar?<p>Thanks & greetings from UK!!<br>Austin
 

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Discussion Starter · #2 ·
Re: S60 Turbo Bleed Valve?? (Austin)

Ok, I went ahead and fitted the valve and it works, or at least to some extent! <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/confused.gif" BORDER="0"> <br>Now top boost is set up to 0.6bar (it used to be 0.4), and you can now feel a major difference under accelleration, that is for about 2 seconds before it drops back to 0.4bar! <br><IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> <br>What's that all about?! <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> <br>I'm thinking that there must be some kind of management system kicking in to bring the boost back down? I was thinking of increasing the boost a touch further, to see if it still goes back to 0.4, but I want someone 'in the know' to advise me first (don't wanna over boost and blow the lump up).<p> <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/confused.gif" BORDER="0"> <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/confused.gif" BORDER="0"> Anyone help?? <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/confused.gif" BORDER="0"> <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/confused.gif" BORDER="0">
 

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Re: S60 Turbo Bleed Valve?? (Austin)

We tried the same thing on my dad's 2001 s60 t5. He had just installed a 3" straight through turbo-back exhaust and noticed more lag and a slight bog on the low end. I told him that on my s40 that a manual boost controller did the trick to speed the spooling and response of the turbo, while also adding the ability to adjust level and response. <p>With an aftermarket boost gauge we measured 10-12 psi under hard acceleration with occasional spikes to 15psi. We then installed a manual boost controller and took it for a run. The first run seemed to work well, we hit the same boost levels as stock but spooled much quicker. He liked it, but wanted a little more. Turned the boost controller a couple of turns and went for another run. On the third run we hit 17psi, needless to say it was a ton of fun from 60mph-110mph, except it threw a check engine light. The code read "the ecu has detected an overboost condition." It then went into limp mode and ran very sluggish. Had to pull the boost controller out and disconnect the battery for a half-hour to clear the code. <p>It ran the same as it did before but still had the same exhaust lag. So he opted for an aftermarket tune. He had it done through Upsolute. Regained all of that low end torque and picked up lots of power in the mid and top end. It now boosts safely to 17psi with enough fuel and timing to compensate.<p>So in conclusion, boost controllers work well, for a while. But the best way to get more boost is with an aftermarket tune. The computer will notice the boost controller and the increased boost and go into limp mode and you'll effectively loos boost and power. Its more trouble than its worth. I'd vote for an aftermarket tune. <p>good luck,<br>Adam
 

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Discussion Starter · #4 ·
I'm looking at adding a chip that'll give me a 45bhp increase, so I guess I'll wait til I fit that til I start playing with the boost again!!<br>You say 17psi is safe? I didn't think i could go that high, seeing as stock boost is only round about 8psi.<br>Anyway, thanks for your help, tis much apreciated!!
 

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Re: (Austin)

stock boost =12psi<p>tuning examples and boost pressure<p>upsolute = 284hp , 304ft/lb/tq, 17psi<p>stage 1 bsr = 18psi<p>stage 3 bsr = 25psi
 

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Re: (Austin)

You cant't use a bleed valve. Boost is a result of several things, not just MAP.<br>The ECU will try to correct. <p>Remove the bleed valve ASAP because it will bring you in trouble in the long run. ECU might go reduced power mode.
 

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Discussion Starter · #8 ·
Re: (Johann)

Thanks for that mate, it's off now. I opened it slightly further than befor, and did get a massive increase in acceleration, but the ecu did keep pulling it back down to 0.4 Bar after a few seconds.<br>I'm looking at adding a 'RACIMAX' chip in a couple of days. Hopefully this will take me up to the 225BHP mark.<br>I'll let you all know how i get on.<br>Cheers guys,<br>Austin <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0">
 
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