If I let my wga dictate what boost I had, I'd have lower in the first two gears, then too much in the top two. Where I have my wga set at now, I think that it would spike above 20 in every gear, and would holt about 16. The boost controller keeps the boost at 19 instead of letting it get out of hand and spike to like 24 or something, then it drops to 16. With the wga alone, you might get it to hold 13 or 14, but you'll be pushing the envelope on whether you'll blow spark, expecially without S1. I could be wrong...if you try it and it works, let me know, I might go that way instead.