Different tuning options

[nickmpower]

I am going to be installing a Downing atlanta supercharger on my 318. I have been looking into different options for tuning. While it is not necessarily needed as people have had these on there cars for over 100k miles, they tend to run lean.

a main concern of mine is that my car has a AFM meter.

The first option and one i am most reluctant to do is megasquirt. It just seems like such a pain in the ass, and is pretty expensive. Not to mention getting it to work the with gauges ect.

another option is to delete the rising rate fuel pressure regulator that the dasc uses, get bigger injectors, and use the Miller WAR or tunerpro to edit the chip myself. I am been looking at tunerpro and it doesnt seem too hard. I am mainly wondering how well I could tune by just using the afm instead also having something that takes boost into account (the rising rate regulator). Obviously it wouldn't be an issue at full throttle but it could be at part throttle. I have seen many turbo chips but most of them use a MAF.

What do you guys think?

[Shuasha]

NickG has tunes for those setups if you want a chip tune.

[nickmpower]

he only has an ecu reflash for the obd2 cars

[Shuasha]

In that case, ditch the 4 pot and buy an S52... more power and less hassle. :)

[123456789123456]

Either get the WAR chip which is interesting or start burning chips. You only need a Willem programmer which is about $30 and chips .50 each. I got one and can burn chips for you or you can have Metric burn them. We both get our tunes from Mark D which are pretty good as long as we get some LM-2 logs of some pulls from you.

John S

[SiGmA]

in that case, ditch the 4 pot and buy an s52... More power and less hassle. :)+1000

[nickmpower]

bump, does anyone have experience with tunerpro? it would be nice to have someone who could give me some help with this.

The first question i have is injector sizing. I have seen the map scale factors but have no idea how I would adjust these for bigger injectors. I'm thinking that most likely I will multiply by the stock injector size and divide by my new injector size?

For creating the base map, I want to adjust for boost. Knowing the boost level at certain RPMs, I was thinking I should multiply the fuel values by atmospheric pressure plus boost and divide by atmostpheric pressure. This seems like it should be pretty accurate for accounting for the extra fuel.

[Matt]

Tunerpro is just a binary file editor. That's like asking a bunch of writers if anyone has experience with paper and pen.

In order to modify the ECU, you will need to understand how it works and change it to work with your new hardware.

[nickmpower]

yes i know what it is. I have been looking at the binary for it.

here is the xfd and bin for my car if anyone wants to take a look

http://tunerpro.net/download/bindefs/BMW/BMW_175_318i_soft378.xdf

http://tunerpro.net/download/bins/BMW/318i_175_soft1267356378.bin

also why are there so many part throttle maps?

[Ammaretor]

In that case, ditch the 4 pot and buy an S52... more power and less hassle. :)

+2000

OR an M52 then turbo it after while ...

[SiGmA]

bump, does anyone have experience with tunerpro? it would be nice to have someone who could give me some help with this.

The first question i have is injector sizing. I have seen the map scale factors but have no idea how I would adjust these for bigger injectors. I'm thinking that most likely I will multiply by the stock injector size and divide by my new injector size?

For creating the base map, I want to adjust for boost. Knowing the boost level at certain RPMs, I was thinking I should multiply the fuel values by atmospheric pressure plus boost and divide by atmostpheric pressure. This seems like it should be pretty accurate for accounting for the extra fuel.To change injector sizing, you adjust the injector constant based on the size difference of your new injectors over stock injectors. So like you said, stock injector divided by new injector size.

For the base map, scaled in more fuel as load increases. And buy an Ostrich2 so you can see what load bin you are in when you are tuning, so you make sure to adjust the correct one.

[nickmpower]

Yeah i plan to buy ostrich but i was hoping to learn as much as I cna before i start tuning. For the low load the load is given as values of 14 thru 90 and high load is 130-190, any idea as to what these values stand for?