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Found 2 results

  1. Looking at some 2020 23 LSVs with different motors and would love some insight / opinions. The end game for me is surfing with the optimum wave...full ballast, PNP, 500 lbs of lead up front / port coffin and a 500 lb bow sac when needed. I'm in the Midwest at a lower altitude (810'). Can a M5 with a high altitude / torque prop do everything I want it to do or do I need to go bigger? Does a M6 and / or 450 require a high altitude prop? Fuel efficiency difference in the three motors (when surfing)? Are there any other factors that I'm missing? Were the transmissions / ratios all the same for 2020 23 LSVs? Thanks!
  2. So I have some technical questions for those master mechanics out there. I understand a great deal of how internal combustion engines work and know most of the facts about the PCM 409 and 450 engines. My question is a bit more in depth though as I seek to understand the difference in these two engines better. WHat is the actual different in them. I have been told that the 450 is just the 409 on a tune. If that is true, is it just a ECM tuner that have on it or is there actual mechanical differences. Is the VVT change in the 450 and are different injectors used? What are the actual differences in the 2 engines and whats to stop someone from turning a 409 into a 450 if its just tuning? Also for both engines with them having high compression ratios(but not force injection) would it be better to run higher octane to avoid predetination vs the recommended base 87?
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