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Stop for a minute and think about the ratios you're going to/from...
If you had changed your Si to a HF tranny, you'd have been dogging from day one.
The HF has more than 2x the gearing of a Si. Hence the reason your Si was at 3500-4000 RPM @ 70mph, whereas the HF is only at 1800-2000.
I'm not saying that changing gears won't improve your efficiency, I'm just saying that straying too far from your max torque will.
The Si could benefit from taller gears, it's a sports car... put efficiency car gears in it, and obviously enough, it gets better... the HF was a complete redesign.
All I'm asking is that people think before saying "use longer gears" b/c it's not always the case.
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
I'd like to think that people might open their eyes at some point... instead, I find it more and more likely that I'll just close mine.
-- Author kept secret.
Je ne veux pas d'une meilleure vie. Je veux être heureux avec celle que j'ai maintenant.
(I do not want a better life. I want to be happy with the one I have now.)
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