If anyone other than Brad is interested, read on. I spoke to the Cummins diesel man regarding block sleeving and cooling, here's what he said. Sleeve material is very important but just as important is the tolerance fit with dry liners. He mentioned a major player is rust/corrosion that gets built up around the block walls in the coolant passages reducing thermal conductivity signifigantly. He went on to say that 1-2weeks in a block bath may be needed depending on corrosion. They use oil squirters at the pistons/walls to help keep temps down and also run oil coolers when required, and sometimes using a finned sump was enough. He also mentioned using a piston surface design that allowed oil to enter the fine grooves in the skirt area reducing friction and taking some cylinder wall heat away in the oil. Also piston ring blowby is a factor. In addition to this info I went back and read some of my American Turbo magazines($15 bucks now!) on drag Honda's. It mentions using ductile iron sleeving and revving them to 9000rpm running 24psi boost, they do however only run ~80mm bore I think and races only last 9sec. If anyone has any other ideas let me know. Craig --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
