03-31-2021, 11:24 AM
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#1552
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Senior Member
Join Date: Jul 2014
Drives: 2020 Hakone
Location: London, Ont
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Quote:
Originally Posted by ZDan
They likely have the same basic requirements regarding how well it runs on 87 for the new model as for the current one. Could be improvements to combustion chamber design, fueling, and spark control make it possible to have the same "driveability" with lower octane fuel with the increased compression ratio.
long/short: I wouldn't worry about it... Especially since we're all gonna use 91 octane minimum anyway!
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Quote:
Originally Posted by Transport3r
Another point to consider is that just because the static CR is now higher doesn’t necessarily mean that the minimum dynamic CR that can be achieved by valve timing is any higher than before. If they’re going to sell the cars in NA, they have to be able to at least run reasonably well on 87, I’m sure that requirement is the same as before. Between valve timing, ignition timing, and advances in DI tech over the past 10 years, I don’t think it’s unlikely at all.
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They were concerned enough with the old ones to say NOT to use 87 so even if it "stays the same" they are not suddenly going to say it is OK.
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