Hammdo have you experimented at all with adding a short intercooler inline below the factory one such as this ? :
http://m.ebay.com/itm/Air-to-Water-I....c100408.m2460
And if not any opinion of if it would be worth it ? I currently am installing the Bosche pump but if I added the extra intercooler I'd probably upgrade to the zl1 or Varimax pump.