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IWantHX · 11-06-2012, 02:32 PM

Hey guys I drive a Honda Civic with a D16z6 sohc vtec engine with ~9.2:1 compression ratio. I have read a few times in a few differant places that higher compression ratio can lead to better mpg, as long as you still drive "correctly".

I am feeling as thought my stock engine needs a rebuild to remain efficient and was wondering about the compression=mpg saying that Ive heard. Would a rebuilt 10.5:1 D16 allow for better mpg than a 9.2:1 D16 if correct driving methods were retained? Also, would a slightly larger cam help as well? Being vtec, the engine runs on "small" cam lobes for cruising, but has "larger" cam lobes for wot/passing situations.

I am looking to rebuild my engine anyways and looking for slightly better mpg, but also slightly more passing power so,
Will slightly higher compression help with mpg?
Will a slightly larger cam help aswell?
Anything else I can do while rebuilding to help with mpg?

11-06-2012, 02:32 PM	#1 (permalink)
IWantHX EcoModding Lurker Join Date: Mar 2012 Location: usa Posts: 22 Thanks: 0 Thanked 0 Times in 0 Posts	Honda, Higher compression = better mpg? Hey guys I drive a Honda Civic with a D16z6 sohc vtec engine with ~9.2:1 compression ratio. I have read a few times in a few differant places that higher compression ratio can lead to better mpg, as long as you still drive "correctly". I am feeling as thought my stock engine needs a rebuild to remain efficient and was wondering about the compression=mpg saying that Ive heard. Would a rebuilt 10.5:1 D16 allow for better mpg than a 9.2:1 D16 if correct driving methods were retained? Also, would a slightly larger cam help as well? Being vtec, the engine runs on "small" cam lobes for cruising, but has "larger" cam lobes for wot/passing situations. I am looking to rebuild my engine anyways and looking for slightly better mpg, but also slightly more passing power so, Will slightly higher compression help with mpg? Will a slightly larger cam help aswell? Anything else I can do while rebuilding to help with mpg?