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Thread: LQ9
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08-25-2014, 06:07 PM #1
- Join Date
- Aug 2014
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- red bluff
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- 2
LQ9
Was wondering if anyone knows the gas mileage for a LQ9 bored to a 408 and does it run hot. Would u recommend it for a every day hot rod driver
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08-25-2014, 06:18 PM #2
The more power you make the more heat the engine generates. This being said, there are a couple of guys running 4-oh-whatever displacement engines in their F-bodies with no cooling problems that I have heard of. Shouldn't be an issue in a truck with the frontal area and larger radiator setup. You can swap in a cooler thermostat and reprogram the fans to come on sooner. The stock thermostat in most GM's are around 198 degrees these days.
Gas mileage all depends on your right foot and final gearing. With an overdrive transmission you should be able to easily keep it in the mid-teens.
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10-14-2016, 04:13 AM #3
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10-14-2016, 05:51 AM #4
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