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Some AFM thoughts... (archive)

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Posted by Stan on September 06, 2001 at 09:18:29:

In Reply to: Re: Ditching the AFM helps the low end AMAZINGLY.. posted by Eric on September 06, 2001 at 08:34:45:

The cheapest and easiest way to ditch the AFM for streetable car is to use a mass air conversion. Try Split Second, Modern Performance in NJ, Dynospot Racing among others. Sometimes you can find factory or Conforti A-N kits - but remember that A-N does not work v. well at low loads and needs to be tuned for each parts combo and deally each engine.

Here's a split second dyno run done by Grass Roots Motorsports mag:

Ideally you should tune on a dyno and then lock down the settings.

I took a different direction and went with aftermarket engine management. I'm using a Link Electrosystems AFM/Link to run Alpha-N with Map sensore correction to avoid the low throttle/low RPM issues with straight Alpha-N. I'm an experienced tuner though and had to do lots of datalogging and the like. I can now also ditch the plenum and make or buy a composite piece. The stock AFM and alloy plenum together weigh well over 10 pounds BTW.

So for most folks, a mass air kit is the easiest route to take. One advantage of mass air over what I did is that as you make mods it can compensate to a large degree.


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