496 Mag w/Whipple Stage II Stock Thermostat Safe??
08-09-2011, 10:45 AM
#11
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The Merc 140 T-Stat does not have the springed splash plate that the 496 T-stat has. I was told by my mechanic, the splash plate keeps the water pressure from forcing the T-stat open by diverting the water around the splash plate which prevent s the water from having a straight shot at the open/close plate of the t-stat...
08-09-2011, 02:06 PM
#12
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Join Date: Oct 2000
Location: Fresno, CA, 93722, USA
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The Merc 140 T-Stat does not have the springed splash plate that the 496 T-stat has. I was told by my mechanic, the splash plate keeps the water pressure from forcing the T-stat open by diverting the water around the splash plate which prevent s the water from having a straight shot at the open/close plate of the t-stat...
The 120 stats don't run 120 because of the small exchanger and cast iron heads, as well as limited water flow. They run 130-140 in cold climates and 140-150 in warmer climates. We run this because stage 2 has 5-6deg more spark throughout the spark curve and this helps prevent detonation. It does soot a touch more than 160deg, but its minimal. If your in MI, run stock stat with the holes and you'll be fine.
