I love E85. I have to drive 45 minutes each way to get it so I get about two months worth at a time. I've been using it everyday in my 2001 civic DX for over a year. I installed bigger injectors and the only problem is it takes longer to start... and the 25% loss of fuel economy. I'm tired of the loss of range.
I've been working on setting up an arduino to advance the timing. That should be done soon, but I don't think it's going to help much for mpg. I have some video on youtube ("civic timing signals" playlist) of me scoping the signals. Once I figure out what is causing the noise in the modified crank position signal I think it will be clear sailing to add a few degrees.
I tried to set up a mega squirt, but I got stuck and then I shelved it when I had kids. maybe I will need it when I raise the compression.
I want to raise the compression ratio of my d17a1 to get better fuel economy. It would be nice to have a little more power, but I don't really want anything that will get me in trouble. I have been reading a lot and two options appeal to me. One is to put in p29 pistons with a thick head gasket everything else the same. The zealworks calculator says that will give me 15:1, which seems radically high in any case and I don't know if the piston dome will even accommodate the head let alone the valves. I don't think it would be a good idea for me to try that project. It will end up making a mess in my shop. Nice work out, but not a great story.
The other option I see is to use d16 crank and rods and whatnot with the p29 pistons. zealworks says 12:1 with stock gasket. That doesn't seem radical enough for the trouble, but maybe I can get away with stock ecu? It seems like it will easily fit since the dome will be 2 mm lower than that of the pms pistons from the GX (I am assuming the GX uses the same head chamber shape).
I also like that using the d16 crank will lower the displacement. I used to drive a 1.6 DX and I got about 42 mpg on gas when my 1.7 DX gets 36.
I went ahead a bought a junkyard core d16z6 (on its way). maybe I can use those parts, or maybe i'll end up with a pile of abused and worn scrap. It will also be nice to have something to practice on before I take apart my daily.
I've seen some charts about how raising compression increases efficiency and I know it's not too magical, but it would be nice to at least try to take advantage of the fuel, and maybe the decreased displacement would get me closer to where I want to be.
any advice would be greatly appreciated! :bandito:
I've been working on setting up an arduino to advance the timing. That should be done soon, but I don't think it's going to help much for mpg. I have some video on youtube ("civic timing signals" playlist) of me scoping the signals. Once I figure out what is causing the noise in the modified crank position signal I think it will be clear sailing to add a few degrees.
I tried to set up a mega squirt, but I got stuck and then I shelved it when I had kids. maybe I will need it when I raise the compression.
I want to raise the compression ratio of my d17a1 to get better fuel economy. It would be nice to have a little more power, but I don't really want anything that will get me in trouble. I have been reading a lot and two options appeal to me. One is to put in p29 pistons with a thick head gasket everything else the same. The zealworks calculator says that will give me 15:1, which seems radically high in any case and I don't know if the piston dome will even accommodate the head let alone the valves. I don't think it would be a good idea for me to try that project. It will end up making a mess in my shop. Nice work out, but not a great story.
The other option I see is to use d16 crank and rods and whatnot with the p29 pistons. zealworks says 12:1 with stock gasket. That doesn't seem radical enough for the trouble, but maybe I can get away with stock ecu? It seems like it will easily fit since the dome will be 2 mm lower than that of the pms pistons from the GX (I am assuming the GX uses the same head chamber shape).
I also like that using the d16 crank will lower the displacement. I used to drive a 1.6 DX and I got about 42 mpg on gas when my 1.7 DX gets 36.
I went ahead a bought a junkyard core d16z6 (on its way). maybe I can use those parts, or maybe i'll end up with a pile of abused and worn scrap. It will also be nice to have something to practice on before I take apart my daily.
I've seen some charts about how raising compression increases efficiency and I know it's not too magical, but it would be nice to at least try to take advantage of the fuel, and maybe the decreased displacement would get me closer to where I want to be.
any advice would be greatly appreciated! :bandito: