Project Rushmore???
Stellar HDF Member
Joined: Mar 2006
Posts: 2,395
Likes: 153
From: Utah
Someone told me that only the exhaust valves are water cooled on some of the touring models... way to go, EPA! This doesn't mean more H.P. I don't think... as it would in the case of a water cooled ENGINE... this means leaner AFR's only?
Road Master
Joined: Jan 2009
Posts: 796
Likes: 0
From: Mission Viejo, CA
I'm seeing 104.7 ft lbs of torque compared to 105.5 ft lbs of torque. Not much of a gain to say the least.
Road Master
Joined: Dec 2011
Posts: 1,122
Likes: 4
From: Florida
If we are going to gain weight and lose horsepower then who wants water cooled? What is the appeal.
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Outstanding HDF Member
Joined: Aug 2012
Posts: 3,217
Likes: 90
From: Detroit
It might add a bit of a safety margin under extreme operating conditions. It also might allow keeping the power level up when things get really hot, rather than retarding the timing.
Road Master
Joined: May 2011
Posts: 789
Likes: 4
From: Utah
It's all about meeting EPA standards. Just like having DPFs and use urea on diesel trucks now. No one wants it because it adds complexity and cost, but manufacturers reach a point where they have done all they can by just adjusting fuel and air mixture. If they don't do something to meet those specs eventually they won't be selling product. We can all thank Cali and CARB as what passes there eventually makes it to the rest of the country.
Last edited by UT-rckr; Aug 21, 2013 at 01:08 PM.