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Date: Tue, 17 Apr 2001 13:03:26 GMT
From: "KeithG" <>
Subject: Re: APC upgrades

Dan, You already have 175 HP with the APC box you have. Your Base boost should be at 6.0psi and you should also have a 2.8 bar FPR. The resistor tweak raises it 10 hp to 185. When you do the tweak, label the resistors so that you can go back easily (R42, etc) also measure and write down the settings of the potentiometers. If this is 'good', drive it for a while. You will notice that the boost spools up quicker. If you need more, the site also details how to tweak it for more power. The similar engine in the NG900 develops 185HP as a base and rolls up to 205HP. This engine is capable of 250-300HP with a bit more work, but the fwd is the biggest problem to deal with. Me, I am happy with the 'tweak' on my '92. It is enough for now. Besi\des, I do not want to rebuild the transmission prematurely. KeithG "Dan Schleifer" <> wrote in message > Ok, so I'm loving my 90' 900spg, and thanks to the help of you guys have > been able to dig in and do some work on it myself. I am considering > purchasing one of these "upgraded" APC boxes, and am just wondering if > any of you all have experiences with any particular company regarding > these. I've read the how-to on modification that supposedly brings it > up to the "red box" standard (replacement of 2 resistors and tweaking 2 > potentiometers), and that sounds fine, but I'm left wondering if that is > all these companies are doing. Are they making other modifications that > increase performance without endangering my engine, or are they just > charging me $350 to replace 2 resistors. Anyway, any advice on > vendors/modifications would be much appreciated. -Dan > > > > -- > Dan Schleifer | 804.242.5088 | > Fenris Security

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