my test map (a/f's)
my test map (a/f's)
x-axis is 10%-130%y-axis is 500rpm -7500rpm increasing in increments of 500 rpms
i was bored in class so i decied to make a fuel map.. so some comments are welcome..
i know its not the clearest, but when i get some free time ill put it on a excel spreed sheet.
all coments pointers, tips welcome, i based this map on my t04b and when it hits boost.
the a/f range form 15:1-10:1
i extended the map to 7500rpms and 130% throttle to compensate for a boost creep, so id be safe that why the a/f is around 11-10:1 around threre.
hope this helps some people this is my basic understanding of how it should look in a rom tune/standalone,
alll thats left to do is caculate the pulse width need to generate this a/f with your bigger injectors and it should be a decent map.
also i made it lean on low throttle b/c i wanted to matain a good drivablilty.
ignition map comming soon...
Modified by turbo2nr at 7:24 PM 4/16/2007
Re: (turbo2nr)
Unless you are making sick boost 11.5 - 11.9 AF ratio is where you want to be. And, you don't calculate anything with a MAF system - this is done for you. I don't know if AF ratios are displayed properly on the DE but you will watch your wide band to get the proper AF ratio.
Re: (Edub1)
Re: (turbo2nr) 6:57 PM 4/17/2007
And, you don't calculate anything with a MAF system - this is done for you.
what do you mean my this im a little lost.
And, you don't calculate anything with a MAF system - this is done for you.
what do you mean my this im a little lost.
Re: (NateDogg)
Well having a basic map like this is good, but Edub is right, the KA calls upon a cell depending on tps, maf, and load. Thats why it's usually such a pain to have a KA tuned. Now if you were just using a MAP sensor and RPM this would work out pretty much perfectly.
But Having a map like that one definitely is a great learning curve of understanding of how tuning works. As long as you have someone to point you in the right direction.
But Having a map like that one definitely is a great learning curve of understanding of how tuning works. As long as you have someone to point you in the right direction.
Re: (turbo2nr)
The way a MAF system works is by maintaining a base pulse width based on info from the MAF and other factors such as "K." The fuel map further modifies the base pulse according to load. Essentially, the computer calculates a base pulse and any additional MAF reading indicates the load on the engine. That is to say that according to the MAF reading the computer knows A) base pulse width at all times and B) how far the throttle is open. It uses A as described and B to look at the table to know how much to enrich or enlean for the given load.turbo2nr wrote:Re: (turbo2nr) 6:57 PM 4/17/2007
And, you don't calculate anything with a MAF system - this is done for you.
what do you mean my this im a little lost.
So, BPW goes on behind the scene and load is trimmed out with the table. The cool thing about this is you can tune fuel while NA and it will stay the same at any boost level. You just have to know where boost will be. Timing is some thing different.
Re: (turbo2nr)
No, a MAP or speed density system is a lot more involved. Honestly, you won't learn about tuning from asking a few questions. I posted a primer on E tuning in this forum. This should cover the basics. If you want to learn about a SD system look at the MegaSquirt website.turbo2nr wrote:so basically if i conver to a map sensor its less to account for so i can do a fuel table based on load and rpm only instead of many variable factors?
the more factors the harder it is to tune as what i see so far...
If my new intake doesn't clean up my AF ratios, I'm going MegaSquirt.
no i have a basic understanding but i just want more info before i actuall attempt.
my plan is too start super conservative and then lean and add timing form there.
i have basic understand of all the engine sensors and how they operate and that the ecu is dependant on multiple factors to pull a cell form the map for a air fuel ratio and timing degree.
the emanage ultimate isnt that involved as a full stand alone, it allows for dummie errors. honestly my biggest diffuclity in the emanage is choosing the correct jumpers and wiring it up correctly and seting the parameters. emanage auto corrects for injectors size and pulse width. and then its gives you a map you can alter. so its not rocket science.
im using the emu to get my feet wet to speak, then im moving to full stand alone. but i was trying to gather useful info and see if i was on the right track which i seem to be.
thanks for all the useful info
my plan is too start super conservative and then lean and add timing form there.
i have basic understand of all the engine sensors and how they operate and that the ecu is dependant on multiple factors to pull a cell form the map for a air fuel ratio and timing degree.
the emanage ultimate isnt that involved as a full stand alone, it allows for dummie errors. honestly my biggest diffuclity in the emanage is choosing the correct jumpers and wiring it up correctly and seting the parameters. emanage auto corrects for injectors size and pulse width. and then its gives you a map you can alter. so its not rocket science.
im using the emu to get my feet wet to speak, then im moving to full stand alone. but i was trying to gather useful info and see if i was on the right track which i seem to be.
thanks for all the useful info
Re: (turbo2nr)
Oh, so you're using Emanage. You have to tell people that. In that case I can't tell you much cuz I've never tuned one. All I can tell you is that you want to be 11.5 - 11.9 under boost.
Re: (Edub1)
What are you using to monitor Knock?
Also honestly speaking the EMU is the closest piggy back out there to a full stand alone. Iv have played with EMU and EMB and love them.
The EMB is not as involved, but I played with my friends AEM EMS, and a EMU on a CRX I used to own, I was really really surprised as how close the EMU is to a full stand alone. If you are a OBD2 person and have to do ECU emissions testing I highly recommend getting a EMU.
And as for learning about tuning. Once again MR Edub is correct. You can't learn about it just from reading, especially if your a person like me that has to learn hands on.
One word of good advice if you have a spare engine block thats stock I recommend learning on that. I have blown up two engines in my process of learning both times from detonation. Now it wasn't anything major but enough to teach me a lesson or two.
Mike
Also honestly speaking the EMU is the closest piggy back out there to a full stand alone. Iv have played with EMU and EMB and love them.
The EMB is not as involved, but I played with my friends AEM EMS, and a EMU on a CRX I used to own, I was really really surprised as how close the EMU is to a full stand alone. If you are a OBD2 person and have to do ECU emissions testing I highly recommend getting a EMU.
And as for learning about tuning. Once again MR Edub is correct. You can't learn about it just from reading, especially if your a person like me that has to learn hands on.
One word of good advice if you have a spare engine block thats stock I recommend learning on that. I have blown up two engines in my process of learning both times from detonation. Now it wasn't anything major but enough to teach me a lesson or two.
Mike