Re: DIY vac advance w/spring -- SUCCESS! (long) - Saab Performance Bulletin Board - Saabnet.com
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Re: DIY vac advance w/spring -- SUCCESS! (long)
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Posted by MS (more from MS) on Mon, 25 Dec 2006 12:58:32 Share Post by Email
In Reply to: DIY vac advance w/spring -- SUCCESS! (long), Notnoel [Profile/Gallery] , Sat, 23 Dec 2006 09:56:36
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You're welcome! So, you're setting the timing advanced? Have you read about the dangers of advancing under all conditions except boost? I read enough to scare me into keeping the timing at stock. Pre-ignition can do some damage to the internals while cruising. The stock distributor and vac advance unit does a good job of safely advancing the timing when conditions permit. Heck yeah I loved the jump this car has when timing is set forward, but then I began to hear ping while cruising in hot outdoor temps and when boosting. As soon as the sensor detects ping, open goes the wastegate. So even with a modified vac advance, you can't get enough psi to take advantage of the increased retard. Or, the boost was spotty and sluggish. With my current stock time setting and increased retard from the modified vac advance plus some added fuel from the booster WU, plus the fmic, I consistently get that added pop when I want it. In fact, I often have more pop than I want and deliberatly pull back. The one thing I do wish I had is the ability to zoom off the line with all those 160 - 200 HP auto tranny cars. Once the rpm's rise and boost kicks in, I'm often their equal, but not off the line. For that I need way more modifications, otherwise known as JakTime.

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