Re: Aswer this question once for all - Saab Performance Bulletin Board - Saabnet.com
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Re: Aswer this question once for all
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Posted by perkj [Email] (more from perkj) on Thu, 16 Dec 2004 12:15:49 Share Post by Email
In Reply to: Aswer this question once for all, Vigge, Thu, 16 Dec 2004 10:53:14
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ok, this is quite easy to answer. A lean mixture is an A/F ratio > 14.7:1 and a rich mixture is < 14:1...agree? I mean 14.7:1 is stoich, therefore above is lean and below is rich. OK so we are square with that, right, I mean how can you argue with it, its fact...not theory, fact.

Ok so now let have a look at the MP A/F ratio graph so we're all on the same page: http://www.saabnet.com/tsn/bb/performance/index.html?bID=87199

Now lets look at the ratio between 5000 and 6000 as you suggested. Oh wait, whats this? the entire time the a/f ratio is below 14.7 and for most of it below 13. Right....I mean that what the graph shows a plan as day....I mean does the graph look differently to those living in California than the rest of the world? OK so I think we're square there...5000-6000, a/f running below stoich and low and behold running rich....remember what we said anything below stoich(14.7:1) is rich by definition. Ok so what was your question or point....oh yeah, the MP car shows a lean a/f mixture...we'll lets go back and look again...hmmmm...below 14.7 rich, above lean....this graph so below 14.7, therefore its running rich....ok, so we've just proven your statement as false.

Now I'm going out on a limb here and anticipating what you'll say next....'well it running leaner than the stock run'...well a better way to state this is that its running LESS RICH than the stock....the way you say it make it out like the car is running lean. No for the 100 million dollar question, does this 'less rich' mixture have a negative effect on the hp and torque curve.....LET GO BACK TO THE GRAPHS: http://www.saabnet.com/tsn/bb/performance/index.html?bID=87199

damn, well would you look at that....between 5000-6000 the run with the downpipe was making more torque and more HP than the stock run that was running MORE RICH. Did this answer your question? I mean its as plain as day....that is unless we out here in CA read graphs different than the rest of the world.

But hell just to humor you, lets use your logic while looking at between 3000 and 4500....in this instance the DP graph show MORE RICH than the stock run...so what do you say here, SAAB got it wrong when they programmed the stock ECU? Damn, thats a pretty bold statement!!


...I'm literally dying to read your come back to this.

posted by 129.42.18...

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