is there even a difference in gst's and ams's boost pills and about how more boost do you get to anyone who installed one.

 

The boost pills are the same as far as anyone can tell. Do not install a boost pill without getting a tune. Very bad things can happen.

 

I think boost increased by approx 5psi, but like jkennedy said, don't install without a tune.

 

I got an AMS pill instead of the GST one (due to ordering difficulties).

I'm not convinced they are the same. I started with the GST Base Maps with the AMS pill, and was hitting higher boost than I thought was appropriate.

So I retuned my BWGDC tables. In the mid-rpm area, my tables are now a good 10% lower than the original GST Base Map settings.


As to how much boost you can hold, mine can stay above 20psi until 5750rpm. That's about 95% WGDC (in winter).

Boost tapers to around 14psi at redline (around 7300rpm, as per GST Base Map setting).

To be honest, it's probably not the pill restrictor hole size that is important here - it's the t/c itself. There's not much to be gained by wringing its scrawny little neck, apart from loads of heat!


In retrospect, I reckon I would have had an easier "out-of-the-box" experience if I'd got the GST pill. However, tuning the boost control stuff was (is) a good learning experience, and pretty satisfying once I really got familiar with it.

Hope this helps.

Rich

 

I have been running the AMS pill with GST v2.5 for some time now (due to ordering problems as well). I hit 24-25 psi, taper down to about 22, and then it slowly drops to 14 psi as the RPM's increase. As others have stated, you will require a tune for any boost pill.

 

where can i find these gst maps, if they are gst motorsports, i just cant seem to find them

 

Go to the Ralliart Engine forum. The mapsare in a sticky at the top of the page.

 

^ this. id suggest sticking with GST boost pill with GST tune, they go hand in hand. if your having trouble ordering from them online try calling them, thats what i did.

 

I've called a few times and left a voice mail with my information. I have not heard back from them(GST). Confidence is falling.

I am also now researching the major differences in pill manufacturers.