Date: Wed, 20 Oct 2004 18:52:18 GMT From: Paul Halliday <pjghnospamyonder.co.uk> Subject: Re: Manual Boost Control Valve Kick --why?
in article G4ydd.33359$cN6.3548nospamread02, 9-3Turbo at NoSpamnospamRS wrote on 20/10/2004 22:25: > I have spoken to my technician about the MBC, which > he has done to his own cars, and encouraged me to do to my own, t5 by > the way. I bet he has ... Saw you coming, didn't he? I'm pretty certain that most "performance tuning" sites that sell MBCs also state that taking the engine beyond the manufacturer's specification is at your own risk. SAAB has a long history of engine protecting devices that go back a long way before even fuel injection was computer moderated. The APC system as used on the classic 900 as far back as 1982 fell out of favour with the so-called SAAB performance crown and "manual boost" looked to be the way forward. There has been quite an exodus back to APC recently, since a number of breakthroughs in understanding (erm, reverse engineering) the box have filtered through. I'm astounded by how effective SAAB APC is and marvel at the more modern engine management systems. How will you sense engine knock? How will your car be able to adjust to knock? You're affecting how the wastegate opens. When your car tells the wastegate to open, you want it to open. Rather than preventing it from opening, why don't you invest the time to understand how the car asks it to open. Then, you affect how the car does that for more power ... Safe power. Have you looked into BSR or Hirsch Performance plug-in power upgrades? Okay, they cost a lot more than a few quid/bucks for an MBC, but your engine and gearbox will remain intact. If you just want a few cheap thrills, then Turbosmart make an electronically activated MBC. You can have your standard setup and flick a switch for MBC. Just be aware that the cheap option *will* cost you in the long term (or even in the short term). The MBC route is still a little, erm, Medieval :) Paul 1989 900 Turbo S http://saab.go.dyndns.org/
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