I am lookign forward to a really nice write up on the tuning of a three-port with the load based boost control. (Hint hint, he he..) I have been lazy and am, this week hopefully, going to go full tilt and get it off the Hallman and onto the three port.

 

MIVEC just increases the engine's efficiency by optimizing it's dynamic compression with regard to load and rpm. On a boosted engine this is done by late intake valve, with MIVEC maps at hands I suppose you can almost find the optimal valve schedule for a given boost profile. This makes me very sad not having this feature

 

Updated the second post with info about AFR tuning. The first post maxed out at 20,000 characters. I guess I write too much

 

great writeups continue .... you should post your excel calculation xml

 

this is just what i was lookin for man, im definately subscribed

 

Nevermind the request, i made one and posted it for everyone

 

Nice calc. You might want to round to the nearest tenth.

 

nj1266,

Great post. Thanks for taking the time for making a nice write-up all in one place.

The only bad thing is that the moderators don't make many stickies in this forum. I think that's one of the main reasons people haven't written a comprehensive post like this before. People get tired of writing and having to write over and over.

Hoepfully, one of these will get stickied so that we can all add pertinent information and have one comprehensive tuning thread.

Thanks again for the time on a great post.


ERic

 

yip Awesome job man!!

Thats why EvoM rocks so much knowledge from awesome peeps on these boards.
To much to learn not enough time.

thanks for a great write up.....

Sticky this MODS

 

Quick question, how does one apply the excel calculator? Thanks!

 

just put in what the data asks for... and then change your values to what the data gives you

more detailed... look at your log, find an AFR that you want to change. Find the corresponding section in your AFR map on your rom.... for example, your log at 5000 and 260 load says you are at 11.6 and you want to be at 11.4, you look on your AFR map in the rom see what the value is then....

first number in the calculator - Desired AFR = 11.4
second number in the calculator - Current value = may be 9.5 or whatever it is on your AFR map in your rom at that location
third number in the calculator - Logged AFR = 11.6
fourth number in the calculator is what is computed for you to enter in your fuel table to get you to your desired 11.4 afr... in this case the value it gives you is 9.3

 

done

 

I can't get the afr calculator to work. What program are you using to open it.

 

use microsoft excel

 

Its an xlsx extension, which I belive is for Office 2007, and chance of a .xls for those who don't have Micro$ofts latest and fattest?

MB