AMS 1000 Questions

[turbodave231]

I just now getting a new AMS-1000 hooked up and programmed. I'm guessing at what rate should be used for the various stages.

I'm looking for input on how long each stage ought to be and how fast to ramp into the boost levels.

My Tial WG has a 11.3psi spring, Too much? Any disadvantages to running a lighter spring? I figure that I can control better at lower boost (launch) with a lighter spring and boost upward with more target......correct?

 

[lazaris]

If your going to launch at a boost level below 11psi then you would need a lighter spring. You may have a bit less launch boost with that spring because of BP that starts to act on the gate.

 

[turbodave231]

Laz,

Thanks for the response. I don't know what launch boost will work best just yet. I have a new turbo, new inter-cooler, and now a new boost controller. Lots to sort out.

I was reading one of Donnie's threads about the AMS-1000. Lots of good info there.

Dave

 

[Bent6]

The spring pressure used depends a lot on whether you use CO2 or manifold reference pressure.

If using CO2, I like to use a spring that is just below the boost level I want to launch. I can always increase it a bit and the CO2 allows as much boost as you want down track.

If using manifold pressure, you want a heavier spring for the most control. Unfortunately this often compromises the level of launch boost and results vary more depending on backpressure, ambient temps, etc. CO2 is by far the more accurate and consistent way to go if you have the option.

As far as your ramp times and levels, I found it best to start simple - say maybe only starting with 1 stage and fine tune it from there depending on what your car wants. A lot of people make the mistake of trying to get overly complicated - you don't have to use all six stages just because it has them. FWIW

 

[turbodave231]

Thanks Will,

I am using CO2 with this new controller. I want to be in the ball park with programming before I make any test passes. I'm thinking lighter spring with more CO2 at launch to keep the gate closed.

Dave

 

[Bent6]

You've got the idea - with CO2 the lighter the spring, the wider the range of control will be. Put a spring in that's just a little lighter than where you want to launch. Use the AMS launch setting to fine tune the launch boost. Then what you want is to bring in all the boost you plan to run as fast as the chassis and track will take it.

Say you want to launch at 10#s. Put a 7-8# spring in the gate and add 2-3#s with the AMS on launch. If you plan to run say 25#s total boost, you would need to take 25# minus the 10# launch which would mean you have 15 addtional #s of boost to add via the AMS after the launch. Set the 1st stage to come in .05 secs after the launch. If you set the ramp to 20#/sec you will be at full boost .80 secs after the launch. The fewer stages the better IMO. Additional stages are usually added to control wheelies, etc. The best thing about the AMS1000 is that it gives you almost unlimited options when it comes to programming and you can make it as simple or as complicated as your particular setup requires.

Hope this makes sense...................

 

[Alky V6]

I've found that the closer you run the car on the edge of traction throughout the run, the more stages you'll need to use to control boost/traction at particular points throughout the run.
Get a baseline of where your shifts are in relation to elapsed time throughout the run. A datalog would be the best way to track this and get the best guesstimations. Set up a stage for each gear change. Don't worry about ramps at this point. Start out with a low control pressure that you know will net low boost and make a pass. Work on your launch pressure first. Then start working up the control pressures and ramp ups for each gear change. You'll then start playing with the ramp up speeds and fine tuning of the stage breakpoints in the timeline of the run.
It's a fun controller to play with, actually.