Adaptronic What do the volumetric efficiency % numbers mean?
#1
Full Member
Thread Starter
What do the volumetric efficiency % numbers mean?
Just got my s6 FD plug and play in, and got it running but its running really badly. Its a single turbo, id1000 primaries, id2000 secondaries, greddy t78 turbo, aeromotive fpr, ffe fuel rails. 44psi base fuel pressure. I kind of understand volumetric efficiency after watching the adaptronic videos on youtube, but im not understanding fuel maps when im looking at mine. Theres 2 fuel maps, one that shows the VE %, and one that shows injector ms. So why would i want to see both of these? When i change one map does it change the other? Or what do each of these maps do? On the VE % fuel map, it'll have like 80% (for example) across the whole map. What exactly does this mean? 80% of what? What is happening if you raise or lower this number? To lean out or richen a map do you adjust the VE % or injector ms? (I know ms changes the length the injectors are open so that would lean/richen it). Not looking to tune this myself. Just want to learn and maybe get it running okay for a little bit. No full boosting of course haha. Thanks! Sorry for all the questions im curious
#2
You should be using fuel and ignition map 1. Fuel/ignition map 2 is what's considered the secondary or dual map. This is one that you would switch to with an auxiliary button to activate a 2nd tune( like a race gas map).
You should have the ve boxes checked in the tuning tabs. This will change the fuel maps to ve from inj ms, and also activate the automated injector staging.
To lean out the engine decrease the ve numbers, and to enriched increase the ve numbers. It's basically an arbitrary number that represents airflow.
First things first you need to pull up the gauge page and verify all sensors are working properly. If you are using the internal map sensor( 4 bar) and you have the map sensor( in analogue calibrations) set to external( this would be the Oem) then the car will run real rich.
The manual comes with the software you downloaded. You will find it in your c drive under Adaptronic. It's labeled select manual. You should read it before using the ecu.
We do have an rx7 QuickStart guide that will be done this week and included in paper version with all new ecu purchases and available for download too.
If you need further help you need to take a datalog of the problem and email the log with ecu file to tech@adaptronic.com.au
You should have the ve boxes checked in the tuning tabs. This will change the fuel maps to ve from inj ms, and also activate the automated injector staging.
To lean out the engine decrease the ve numbers, and to enriched increase the ve numbers. It's basically an arbitrary number that represents airflow.
First things first you need to pull up the gauge page and verify all sensors are working properly. If you are using the internal map sensor( 4 bar) and you have the map sensor( in analogue calibrations) set to external( this would be the Oem) then the car will run real rich.
The manual comes with the software you downloaded. You will find it in your c drive under Adaptronic. It's labeled select manual. You should read it before using the ecu.
We do have an rx7 QuickStart guide that will be done this week and included in paper version with all new ecu purchases and available for download too.
If you need further help you need to take a datalog of the problem and email the log with ecu file to tech@adaptronic.com.au
#4
Full Member
Thread Starter
Thanks for the help guys! Got it running pretty good for now! Whats the best way to learn what everything in tuning actually does and represents rather than me just blindly putting in numbers until it runs okay? Like how do you learn what the VE % should be at 2000rpms at -6 inches vacuum? Or how much timing advance degrees i should be running? How did you guys start out and learn all this?
#5
Full Member
Join Date: Sep 2013
Location: Philippines
Posts: 183
Likes: 0
Received 0 Likes
on
0 Posts
Hi mate,
I'm no Pro tuner, but I guess learning to tune will be a mix of good fundamental knowledge and lots of hands on experience. Here's a good video to watch -
Cheers.
I'm no Pro tuner, but I guess learning to tune will be a mix of good fundamental knowledge and lots of hands on experience. Here's a good video to watch -
Cheers.
#6
Full Member
Thread Starter
Thanks mark! I watched that along with a few other videos! Helped me understand a lot more but itd be nice to learn even more! Also, it seems like my VE numbers are really high, i dont get why? Like my idle ve numbers are at like 100% and thats where it runs best, is that okay?
Trending Topics
#8
Full Member
Thread Starter
I did the set primary to ID1000 and then hit apply preset (or whatever it says cant remember exactly atm) and then did apply. Then did the set secondary to ID2000 and did the same thing. Shouldnt it be okay? Or are you supposed to do it differently?
#9
Ok, then that isn't the issue. Sounds like your engine just wants more fuel. You are using a wideband right? How many inches of vacuum does the engine pull at idle? What type of port?
You are fine, just increase and decrease the VE numbers so you get your target AFRS.
Generally this is 13.1 at idle, 14.7 while cruising, 13.1 at zero psi, 12.5 at 5psi, 11.9 at 10psi, and 11.5 near 15 psi, etc.
You are fine, just increase and decrease the VE numbers so you get your target AFRS.
Generally this is 13.1 at idle, 14.7 while cruising, 13.1 at zero psi, 12.5 at 5psi, 11.9 at 10psi, and 11.5 near 15 psi, etc.
#10
Full Member
Thread Starter
Ok, then that isn't the issue. Sounds like your engine just wants more fuel. You are using a wideband right? How many inches of vacuum does the engine pull at idle? What type of port? You are fine, just increase and decrease the VE numbers so you get your target AFRS. Generally this is 13.1 at idle, 14.7 while cruising, 13.1 at zero psi, 12.5 at 5psi, 11.9 at 10psi, and 11.5 near 15 psi, etc.
#11
Junior Member
Join Date: Apr 2001
Location: Ballarat, Victoria, Australia
Posts: 39
Likes: 0
Received 0 Likes
on
0 Posts
Thread
Thread Starter
Forum
Replies
Last Post