In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bennettdan wrote:

Capt. Quirk, 
    You dont need the O2 sensor to make a ECU work but then its a speed density unit and its only as good as the tune you install in the ECU and unless you have a dyno to make full power then using the O2 sensor will keep it in the optimal 14.7 to 1 ratio with a regular o2 sensor but the real power is made with about 12.5 to 1 or 13 to 1 AFR in most performance engines so a wide band O2 will make the most HP in theary...For most of us going to a Dyno is not an easy and the O2 sensor will make the motors run pretty good.

markistuff, 
    I really think that the small mosfet drivers you have are not up to the job.I like the IRL510 and should work very nice and I would even add a heatsink to handle heat. You can parrallel two of the mosfets together and up your available current handling and also one good thing about parralleling two mosfets together is that if one gets a little to hot and wont conduct as much the other will take over and let the first one cool and that way you never will be shy of the current you need. The only other thing I might suggest is the reason why I plan to use the SX48 is that the PWM the SX28 generates is not the best for a motor or solenoid this might be causing you some headache, do you have acess to a Oscope to check any of your signals?

---------- End of Message ----------


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=2&m=192262#m192886

Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)