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Date: Sat, 11 Jan 2003 18:34:34 GMT
From: Paul Halliday <pjghnopsamyonder.co.uk>
Subject: Re: 9-5 Aero Raves & Rants (mostly rants)


in article Xns93006A7DF27AFfritzfriicomnopsam17.128.40, Gary Fritz at fritzxxxnopsamrii.com wrote on 11/01/2003 17:28: > tom reingold <trn244nopsamnline.net> wrote: >> By the way, Gary, you could get quicker acceleration by hanging out in >> lower gears. But you probably know that already. > > Doesn't help. I can be cruising in second gear at 3000rpm, punch the > accelerator, and not much happens for over 1.5 seconds. Then it slams you > into the seat. > >> But I have heard claims about how they have eliminated most of the >> turbo lag over the years. Not true? > > That's what I'd heard too. It's not true for my Aero, nor for the other > 2 Aeros I tried driving after I bought my car and realized how annoying the > delay was. The lag is much longer than my other 2 turbo Saabs, and the > pre-boost to post-boost jump in power is MUCH larger, which makes it much > harder to manage. Once the turbo finally spins up, there's LOTS of torque, > but the long lag and the sudden big jump in power make it hard to drive > smoothly. The torque is only there 2sec after you tromp on the gas, never > when you're driving normally. Gary, I gather from a previous post that you've driven other Saab turbos (namely classic 900s). If I can gently put it, maybe you need to re-learn your turbo driving style. The 9-5 is no doubt a very different beast to the older Saab turbos. The one I test drove (just for fun) was exciting, simply put, but I'm sure I would be in the same position as you if I had one. It did appear too keen at times you didn't it and reluctant to "go for it" when you did. I often liken turbo driving to automatic driving - you need to work with the car, rather than just instruct it. Tromping on the gas will not give the full boost when you demand it, but I don't need to tell you that. Given the fuel injection system on the 9-5, I would have thought that the boost curve would have been more gentle than you describe. I would have thought that the fuel injection would "fill in" the power band until the turbo was ready for boost. As I said above, perhaps you just need some time with the car to get to know it a bit better and learn how and when to apply the accelerator to full effect for the turbo. If you're not that bothered about the full boost power, perhaps the ECU can be slightly detuned to produce a more gentle spool-up. Regards. I hope it becomes a little less of an annoyance to you though. Paul 1985 900i 16V 1989 900 Turbo S http://pjgh.go.dyndns.org/saab/index.html

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