Date: Thu, 25 Aug 2005 19:11:23 +0100
From: Grunff <grunffnospam.com>
Subject: Re: Massive Loss of Oil... Did I kill her? (loooong)


Dexter J wrote: > Grunff, Dave - long time no read. Hi Dex, > however I happen to have an ongoing project I > can't seem to get time to get back to regarding rebuilding/bullet > proofing the stock BPC. Yes, I remember you mentioning that. > The primary 'performance' benefit of the MBC or MBC+A is that it > bypasses the APC logic regarding locking down boost in 1st and 2nd gear > (some care must be taken when engine is cold in the morning or hot in > traffic) as well as squeezing several extra pounds of boost into the > system in all gears. In top gears - stock SAAB APC BPC logic sees the > waste gate cut out about 8-10 pounds short of theoretical max automatic > timing adjustment to allow for longevity and to provide some buffer in > operational and fuelling parameters. This max point is different > depending on model - so - higher on Aero, lower on CS(E), lower still > on LPT. The MBC and particularly the MBC+A lets you reclaim some or all > of that extra boost - which is particularly exciting in first and > second gears .. :) .. <snip other useful info> Fair point about extra boost in lower gears, but I still think overriding the knock detection in this way, unless you spend *a lot of effort* setting the system up, can only do more harm than good. -- Grunff

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