diff --git a/copycat/codelet.py b/copycat/codelet.py
index 65d4f94..edb4ed8 100644
--- a/copycat/codelet.py
+++ b/copycat/codelet.py
@@ -3,7 +3,6 @@ class Codelet(object):
         self.name = name
         self.urgency = urgency
         self.arguments = []
-        self.pressure = None
         self.timeStamp = timestamp
 
     def __repr__(self):
diff --git a/copycat/coderack.py b/copycat/coderack.py
index 3674755..df1eb4b 100644
--- a/copycat/coderack.py
+++ b/copycat/coderack.py
@@ -5,7 +5,6 @@ import random
 import codeletMethods
 import formulas
 from codelet import Codelet
-from coderackPressure import CoderackPressures
 from temperature import temperature
 from workspace import workspace
 
@@ -74,7 +73,6 @@ def howManyToPost(workspace, codeletName):
 class Coderack(object):
     def __init__(self, slipnet):
         self.slipnet = slipnet
-        self.pressures = CoderackPressures()
         self.reset()
         self.runCodelets = {}
         self.postings = {}
@@ -116,7 +114,6 @@ class Coderack(object):
         self.codelets = []
         self.codeletsRun = 0
         temperature.clamped = True
-        self.pressures.reset()
 
     def updateCodelets(self):
         if self.codeletsRun > 0:
@@ -125,7 +122,6 @@ class Coderack(object):
 
     def post(self, codelet):
         self.postings[codelet.name] = self.postings.get(codelet.name, 0) + 1
-        self.pressures.addCodelet(codelet)
         self.codelets += [codelet]
         if len(self.codelets) > 100:
             oldCodelet = self.chooseOldCodelet()
@@ -178,7 +174,6 @@ class Coderack(object):
 
     def removeCodelet(self, codelet):
         self.codelets.remove(codelet)
-        self.pressures.removeCodelet(codelet)
 
     def newCodelet(self, name, oldCodelet, strength, arguments=None):
         #logging.debug('Posting new codelet called %s' % name)
@@ -188,7 +183,6 @@ class Coderack(object):
             newCodelet.arguments = [arguments]
         else:
             newCodelet.arguments = oldCodelet.arguments
-        newCodelet.pressure = oldCodelet.pressure
         self.post(newCodelet)
 
     # pylint: disable=too-many-arguments
diff --git a/copycat/coderackPressure.py b/copycat/coderackPressure.py
deleted file mode 100644
index 229b7d7..0000000
--- a/copycat/coderackPressure.py
+++ /dev/null
@@ -1,115 +0,0 @@
-import logging
-from formulas import Temperature
-from slipnet import slipnet
-
-
-class CoderackPressure(object):
-    def __init__(self, name):
-        self.name = name
-
-    def reset(self):
-        self.values = []
-        self.codelets = []
-
-
-def _codelet_index(codelet):
-    name_indices = {
-        'bottom-up-bond-scout': 0,
-        'top-down-bond-scout--category': {
-            slipnet.successor: 1,
-            slipnet.predecessor: 2,
-            None: 3
-        },
-        'top-down-bond-scout--direction': {
-            slipnet.left: 4,
-            slipnet.right: 5,
-            None: 3,
-        },
-        'top-down-group-scout--category': {
-            slipnet.successorGroup: 6,
-            slipnet.predecessorGroup: 7,
-            None: 8,
-        },
-        'top-down-group-scout--direction': {
-            slipnet.left: 9,
-            slipnet.right: 10,
-            None: -1,
-        },
-        'group-scout--whole-string': 11,
-        'replacement-finder': 12,
-        'rule-scout': 13,
-        'rule-translator': 14,
-        'bottom-up-correspondence-scout': 15,
-        'important-object-correspondence-scout': 16,
-        'breaker': 17,
-    }
-    i = name_indices.get(codelet.name, -1)
-    try:
-        return int(i)
-    except (TypeError, ValueError):
-        try:
-            node = codelet.arguments[0]
-            return i[node]
-        except KeyError:
-            return i[None]
-
-
-class CoderackPressures(object):
-    def __init__(self):
-        self.pressures = [
-            CoderackPressure('Bottom Up Bonds'),
-            CoderackPressure('Top Down Successor Bonds'),
-            CoderackPressure('Top Down Predecessor Bonds'),
-            CoderackPressure('Top Down Sameness Bonds'),
-            CoderackPressure('Top Down Left Bonds'),
-            CoderackPressure('Top Down Right Bonds'),
-            CoderackPressure('Top Down Successor Group'),
-            CoderackPressure('Top Down Predecessor Group'),
-            CoderackPressure('Top Down Sameness Group'),
-            CoderackPressure('Top Down Left Group'),
-            CoderackPressure('Top Down Right Group'),
-            CoderackPressure('Bottom Up Whole Group'),
-            CoderackPressure('Replacement Finder'),
-            CoderackPressure('Rule Codelets'),
-            CoderackPressure('Rule Translator'),
-            CoderackPressure('Bottom Up Correspondences'),
-            CoderackPressure('Important Object Correspondences'),
-            CoderackPressure('Breakers'),
-        ]
-        self.reset()
-
-    def calculatePressures(self):
-        scale = (100.0 - Temperature + 10.0) / 15.0
-        values = map(
-            lambda pressure: sum(c.urgency ** scale for c in pressure.codelets),
-            self.pressures
-        )
-        totalValue = sum(values) or 1.0
-        values = [value / totalValue for value in values]
-        self.maxValue = max(values)
-        for pressure, value in zip(self.pressures, values):
-            pressure.values += [value * 100.0]
-        for codelet in self.removedCodelets:
-            if codelet.pressure:
-                codelet.pressure.codelets.remove(codelet)
-        self.removedCodelets = []
-
-    def reset(self):
-        self.maxValue = 0.001
-        self.removedCodelets = []
-        for pressure in self.pressures:
-            pressure.reset()
-
-    def addCodelet(self, codelet):
-        i = _codelet_index(codelet)
-        if i >= 0:
-            codelet.pressure = self.pressures[i]
-        if codelet.pressure:
-            codelet.pressure.codelets += [codelet]
-        logging.info('Add %s: %d', codelet.name, i)
-
-    def removeCodelet(self, codelet):
-        self.removedCodelets += [codelet]
-
-    def numberOfPressures(self):
-        return len(self.pressures)
diff --git a/copycat/copycat.py b/copycat/copycat.py
index 79399fd..ad8091b 100644
--- a/copycat/copycat.py
+++ b/copycat/copycat.py
@@ -18,7 +18,6 @@ def mainLoop(lastUpdate):
         coderack.updateCodelets()
         slipnet.update()
         workspace.updateTemperature()
-        coderack.pressures.calculatePressures()
         lastUpdate = currentTime
     logging.debug('Number of codelets: %d', len(coderack.codelets))
     coderack.chooseAndRunCodelet()