joseph143

iTrader: (8)

Any progress fred?

mrfred

iTrader: (50)

mileage seems to be the same or a tiny bit less with mivec zeroed out in the cruise cells. i'll try going the other way soon.

fireroasted

iTrader: (3)

Unfortunately I have some data on the MIVEC, but because mine is busted in some illogical driving me nuts kind of way. I have either had the MIVEC map entirely zero'd out or the solenoid unplugged for over 3 weeks, and I track my MPGs all the time as my regular routine. I am about 1 almost 2 MPG less, however the real kicker is that I suspect my driving is much more mellow now since I know there is 'something' wrong with the car. Theoretically with this kind of driving I would see a mild gain in MPG. I average 23-24 and I am seeing 21-23.


shameful plugs:

In case anyone wants to see if they can help me solve this nightmare....

Here is one of my threads troubleshooting and replacing the whole system.
https://www.evolutionm.net/forums/ev...ere-start.html

Here is a vid of the noise...
https://www.evolutionm.net/forums/ev...ning-load.html

What voltage at the OCS
https://www.evolutionm.net/forums/ev...d-harness.html

mrfred

iTrader: (50)

Evaluation has been slow going because I haven't been driving it too much. Early indications are that a MIVEC map with a lot of advance in the cruise cells is giving better mileage than zero advance. I put in more advance than I had been running in quite a while, and my gas mileage this last tank was the best its been in a long time, but not by much, maybe 5 miles (not mpg) more. However, its about 20 miles better than what I got with MIVEC zeroed out in the cruise cells. I haven't gone full advance yet, but I'll try that after I get through the current tank of fuel.

Gaboyo

Interesting you bring up the kseries. Just some background. I come from the honda community. Owned both a type s and new si both tuned by me using kpro and flashpro. My type s was turbocharged at the stock compression of 11:1. I increased ignition timing in the cruise range just like you mentioned and notice increased driveability and gas mileage. I didn't run a leaner a/f ratio because of the high compression of the motor a draw back you guys dont have. Now as far as cam tuning I'm not sure if the same tuning methods can be used. In my case I would set the cam agle at a fix position. For example..... Set at 10º across every load cell. Do a third gear pull from 2500 rpm to 6000 rpm tune a/f ratio to desired range and then adjust ignition accordiingly. Once set, datalog 3 runs. Repeat all the way up to 50º both on the low and high cam tables. I would then use a virtual dyno similar to what you guys use and build my cam agle table based on the cam agles that made the most power @ a given load (rpm). I know mivec works completly different and there is no "high", "low" cam profile but couldn't the same tuning method be used with similar results? I hope I'm explaining myself clearly. I have yet to purchase an Evo but for now I'm trying to familiarise myself with the tuning side of it since I also plan to do my own tuning on this vehicle. Alright done rambling lol.

mrfred

iTrader: (50)

I've gotten through a few tanks of fuel running full advance in the cruise cells, and I feel very comfortable saying that full advance is better for mileage than no advance. However, I'm not sure I can see any more than a 2% increase in mileage when going from moderate advance to full advance. Its definitely not the hidden secret for awesome gas mileage.