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05-19-2011
Personally preference, just noticed I pulled harder with 605s cause my tune is set up that way, but going to cold on plugs can induce knock as well, also notice better fuel with 605s over 104s. Every motor is different.Originally Posted by 04boostedindyss
So I say stick to 605s until you are on a 3.4 and then go for 104s.
05-19-2011
My research on the topic of thermostats has yielded the following results:
Benefits of 180 degree thermostat:
- Possibility of longer engine life if you beat the snot out of it at the track every weekend (engine life remains minimal).
- Possibility that chunky coolant (because you suck at preventative maintenance) won't cause as much clog and over heat the engine as much.
- Possibility to slow disintegration of Series II nylon lower intake manifold gasket if it has not yet occurred.
Benefits of 195 degree thermostat:
- Better mileage.
- Significantly better heater output in the winter.
- Oil temperatures rise high enough to boil out excess fuel and moisture in the winter.
- 30% longer engine life for those using cars for lots of winter short trips
- Longer intervals between oil changes because the oil stays healthier.
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