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243 heads on lq4 in a 2500 4x4?

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Old 03-30-2016, 09:36 PM
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Default 243 heads on a 6.0 2500?
Any thoughts? Too high compression for towing?
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Old 03-31-2016, 11:55 AM
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A slight bump in compression will help but without some tuning and maybe a mild cam you won't really take full advantage of it.
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Old 03-31-2016, 12:30 PM
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Originally Posted by 1FastBrick
A slight bump in compression will help but without some tuning and maybe a mild cam you won't really take full advantage of it.
I have a great tuner that's not an issue. But he expressed some concern about pinging on 91 with the stock cam while pulling a load
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Old 03-31-2016, 12:32 PM
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Default 243 heads on lq4 in a 2500 4x4?
Has anyone done this? If so is it a direct bolt on? If not what has to be changed? Will the higher compression make it ping while pulling a load?
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Old 03-31-2016, 12:42 PM
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It's all relative to the quality of the gas and aggressive the tune is.

I have run 87 on a stock tune in my LQ9 which would be roughly the same compression as and LQ4 with 243 heads and experienced no pinging or knock retard under WOT.
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Old 03-31-2016, 12:44 PM
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It's a Direct bolt on for an LQ4
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Old 03-31-2016, 03:01 PM
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What about pulling 8000lbs?
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