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Heat soak and the 5.7 hemi

12812 Views 31 Replies 13 Participants Last post by  MoparR/T
This engine seems really sensitive to heat soak. More so than any other engine I have owned. Maybe my opinion is due to the 0-60 timer we have, whereas all my other cars have not had such a tool/reference point to judge this by, but wow the difference in performance.

When the motor is freshly warmed, I am getting roughly .2x to .3x better 0-60 times vs when it's highly driven/warm/heat soaked. This creates more of a performance difference than any mod I've done. The best mod I've seen for our cars is an engine with about 5 minutes warm up time vs driven all day. It hates heat! I even installed a water/meth injection kit (running 80/20 meth to water, as this has given best results) in an attempt to mitigate the heat soak to no avail. Being able to manage this heat soak seems to be a worthwhile mod for this engine.

As a note, I just installed a srv 392 intake manifold, which is the best mod I have done so far, but 0-60 times range from [email protected] 80 degree ambient temp to a heat soaked 4.9x at same temp.

Any ideas on how to reduce heat soak?
Any thoughts?
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This engine seems really sensitive to heat soak. More so than any other engine I have owned. Maybe my opinion is due to the 0-60 timer we have, whereas all my other cars have not had such a tool/reference point to judge this by, but wow the difference in performance.

When the motor is freshly warmed, I am getting roughly .2x to .3x better 0-60 times vs when it's highly driven/warm/heat soaked. This creates more of a performance difference than any mod I've done. The best mod I've seen for...
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