S/C Apex Gems settings 10k

I ride mine from 7-11k but spend most of my time at 9-10k. My settings are:

Mode 1: 2
Mode 2: 3
Mode 3: 3
Mode 4: 4
Mode 5: 2.5
Mode 6: 4 down low and 2.5 to 3 up high

When my sled surges bad it is usually mode 6 is set too high and needs to be lowered. Those numbers should get you close based on my experience over the last 3 years. Good Luck.

Stock primary weights fully loaded with rivets, B-P-B spring 14.5 rollers and about 45 deg of helix on the shockwave with a white spring @ 70. It over revs some but overall it works pretty well:face-icon-small-hap

The clutch setup is actually from MPI so I did not come up with that on my own. I did try running the 8FA weights loaded and it pulled a little harder down low but suffered 1000 rpm swings on a deep snow hillclimb.

I think my main struggle was learning the GEMS controller and how it worked with changing altitude/air temp/air density all in combination. Some days when I went from the truck to 10k feet, the sled would surge so bad it would almost thow you over the bars like someone else was in control of the on/off switch. If you suffer from that, adjust the altitude, mode 6 down until it clears up. It was so dramatic that I was sure the GEMS got wet and carried a spare controller all the time until I figured out the adjustment. At first I tried adjusting too many settings at once...if the settings worked 1000 ft lower leave them alone except for mode 6.

I have come to the conclusion on these that if you get them running at 90-95% your gonna be pretty dang happy with the performance and learn to live with the 5% or so that's not quite right.:face-icon-small-ton

gems mode

please explain mode setting on gems. when tou say mode 1 set at 2 what does that mean? And how do you get it there? i have a stage ii MPI nytro and idles at 13.7 AFR runs about 14.5 at wot. First ride and still learning grms settings

thanks

I think you might want to study the info from MPI to get a grasp of the basics. Here is a link:

http://mountainperformance.com/Files/Download/Nytro Supercharger GEMS Controller Setup.pdf

Then maybe talk to Matt or Mack at MPI to get the base settings for your elevation and setup. I am not familiar with the Nytro or stage 2 stuff. I carry a printout of the above linked info with a pen in my sled and make notes of my settings in a chart form...Get it close and make 1 adjustment at a time and you will get what you want.

Good luck.