Dont waste money, time and energy with small wattage heaters.
A larger heater will get the engine warmer, faster and to a higher temperature.
Smaller heaters just slowly waste energy by bleeding heat off into the surrounding environment, never getting the engine up to a more usable temperature.
If you click on my fast warm up ideas link on the last page I updated the idea with actual tests using a 3700w engine heater setup. That heater set up got the engine warmer, faster and used less energy than a single heater element setup.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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