Quote:
Originally Posted by hayden55
Shouldn't matter if you just shift down to get up the occasional hill. Dropping the RPMs on cruising is where the big BSFC gain comes from. 3k rpm to 2k rpm is about 10 mpg on the D16.
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Wow that is a big gain! I doubt that I would see those kind of gains on my D17 though, like I said I didn't see any loss in MPG from swapping in this shorter geared transmission. Also, when cruising around town, I get higher MPG cruising in 3rd gear than 4th gear up until around 3K RPM. The conventional strategy of "cruise at as low of an RPM as you can without lugging the engine" doesn't seem to work for me, perhaps because I have a Crower Stage 1 camshaft. Although it runs well cruising on flat ground down to around 1500 RPM, doing so doesn't seem to be efficient on my setup.
The other issue with the HX trans is those are basically impossible to find here, an 01-05 Civic with a DX/LX/VP 5 speed is hard enough to find here. "Older" Honda's aren't particularly common here and the ones I see in junkyards are almost always autos. Actually I'm not sure that I have even seen a 7th gen Civic HX here