Apologies in advance if this has been discussed/debunked previously.

Now, I know it's the general consensus that LE-Jet sucks for intake/exhaust modifications.
For example, freeing up the intake, adding a more agressive cam, and putting a low restriction exhaust on will make the car run lean, even to the point where power will decrease in some cases compared to stock.

What I don't understand in this case, is why the mixture adjustment on the airflow meter has not been employed to add the required extra fuel?

I thought, at first, that it was a base idle mixture screw, but on further head scratching and digging for information it seems it does, in fact, directly adjust the mixture across the rev range, somewhat like the mixture screw on a carburetor.

So basically, have any of you guys tried this before? If not, why? Looks to me like the LE is a lot more tunable than y'all think.

As I understand it, it does mainly affect idle...or thereabouts. More to the point, you'll typically need a lot more enrichment at the top end than you will down low. Given that accurate AFRs are critical to achiving both power and reliability, and that LE-Jet pretty much seems to suck anyway, I'd get shot of it ASAP if you're planning to tinker.

cheers

James

Andy found a schematic of LE a while ago, it's basically a set of resitor capacitor networks to sort out timing depending on revs and flappy paddle from memory. Without looking at it again, I'd assume Foggy is right, that one screw can't accurately change the fueling for all rev/load combinations in the way a new cam etc would require

This is also the reason that I don't think carbs for a DIY tuner are a good idea, not only do you need to know where to fuel, but you need to really know your stuff to get them jetted properly across the rev range, not an easy job at all!