|
Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
|
Thread Tools | Search this Thread |
06-17-2013, 03:11 PM | #1 |
Senior Member
Join Date: Jan 2013
Drives: 2013 Asphalt FR-S
Location: Orange County
Posts: 1,639
Thanks: 632
Thanked 981 Times in 537 Posts
Mentioned: 100 Post(s)
Tagged: 0 Thread(s)
|
BRZedit E85 How-To
Greetings,
So, after much debate and sitting on the fence I finally decided to give E85 a shot... Until recently it has not been available in my area but that has changed recently. Anyway, after a lot of inner debate I finally decided to give it a shot. I figured, if I like the results it will help tide me over until Nameless releases the Tri-Y long tubes... This is not a thread to discuss the pro's and con's of ethanol, there are plenty of those around. It Is a thread to show BRZedit users how to do the "conversion" and to discuss related tuning issues. What needs doing Esentially, you will need to do two things:
Additional Fuel Requirements As i was getting ready to do the conversion i put together a little spreadsheet to help me figure out the additional fueling requirements of various ethanol blends. After some fine tuning, it turns out these numbers are VERY close and should prove helpful. You will want to pickup an ethanol content test kit so you can test the blend at your local stations. My local station turned out to be E80, i assume this will get stronger as we get deeper into the summer. So, what you need to do is figure out how many gallons of fuel you have left at a given fuel gauge reading then look up the splash blend on the chart. I fugured out where the point was that I would have 2 gallons of E10 left in the tank. I then when and picked up three 5 gallon gas cans and headed to my local E85 pump. I put 4 gallons in each can and headed home with 12 gallons of E85. I then drove around till i got to the 2 gallons left point. Scale the injectors I want to give a HUGE thank you to Tony (Toni?) over at @FA20Club.com for helping me figure out which map controls the scaling of the direct injectors. There are several suspects but it turns out GDI Pressure Multiplier A & B are the tables we will use to scale the DI's. The Port injectors are scaled using Injector Flow Scaling. On to the process:
So, with the DI's we scale up the flow rate, with the port injectors, we scale down the size to increase the pulse width. My testing showed to keep things balanced, you needed 100% change on the DI's and about 85% change on the Ports. Go ahead and add a degree of timing globally for mixes over E70. I added 1 up to 2000 rpm and 40 load, then 2 from 2000 / 40 load and up. Here is a screen shot of stock scaling vs E80 scaling: Tip-In Enrichment As many of us are noticing, the factory tip-in enrichment settings leave something to be desired... sometimes resulting in tip-in knock retard. This is an optional step, but one i have decided to use, scaling the tip-in tables up to account for the additional fuel requirements.
I have also added an additional 10% from 0.00 to 5.86% delta. This will probably need some fine tuning for each setup. Initial Tuning I did several iterations of maps based on various mix ratios from adding 4 gallons E80 at a time to the 2 gallons of E10 i had in the tank. It does take a minute for the Ethanol blend to work it's way through the system so you have the option of pulling up the logger, starting the car on the pump gas map and watching the fuel trims until they start to swing heavily in the positive direction... at that point, shut it down, flash the E map, start it back up and wait for the trims to settle down. You will want to watch the injection mode. 1 is port only, 2 is DI only, 3 is combined. You can free rev the engine and hold it at various modes to see how the rough scaling is working out. Based on all my testing, the numbers i posted should be very close. You will probably need to adjust the maf scaling a little bit at idle, once off idle the numbers should be bang on. Take it for a drive, log your trims and your injection mode. Adjust as needed. You should now be ready to hit the dyno Cold Start Tuning Will update as it starts to get cold, There are several tables to adjust from cranking enrichment to warm-up enrichment. MBT tuning You can either burn through your tank of diluted E mix and fill up again or head on to the dyno, thats up to you. I waited until the 2nd tank. Once on the dyno, dial in your AFR's. I tired several variations between low 12's (12.1) and high 12's (12.9) and did not find much difference at all so i settled on 12.6 for the first tune. Next up is timing. Hopefully you are starting from your pump gas tune with a good timing map. You will add timing 1 degree at a time and make a pull. Once you reach the point where you stop seeing noticeable gains at a given rpm, you stop adding timing there, and back it off a little bit. Work your way up the rpm range, You will not be able to add much timing bellow 4,000 or so if you were tuned on 93 octane, but it will take a lot more timing up top. Keep working your way up, watching for knock retard and or knock correction. As you add timing you may need to add a little fuel to keep AFR's where you want them. When your done with timing, do a couple of back to back pulls to make sure there is no knock retard. Back off the tune a degree or so (depends on your degree of confidence) and flash your final map. attached is the plot my my best pump gas tune vs my first E85 tune. Same mods (FA20club.com CAI, Nameless catted Front / Over pipe, Nameless axle back), same dyno, 2 weeks apart.
__________________
~Namaste~ Last edited by mad_sb; 06-17-2013 at 04:33 PM. |
The Following 10 Users Say Thank You to mad_sb For This Useful Post: | ATL BRZ (06-17-2013), Drift-Office (06-17-2013), evox2frs (06-17-2013), jamesm (06-17-2013), JiB (06-18-2013), Lateapex (06-27-2013), Lonewolf (06-17-2013), SportInjected (06-17-2013), Sportsguy83 (06-17-2013), Wayno (02-25-2015) |
06-17-2013, 03:19 PM | #2 |
Banned
Join Date: Mar 2013
Drives: 2013 FR-S
Location: Orlando, FL
Posts: 2,929
Thanks: 1,166
Thanked 2,293 Times in 1,180 Posts
Mentioned: 313 Post(s)
Tagged: 4 Thread(s)
|
Awesome! This is the type of stuff this community needs.
|
06-17-2013, 03:41 PM | #3 |
NASA SpecE30 Racer
|
Nice write up. How much timing did you end up running at 7000 RPM?
__________________
- King Tut
Street/Track Car: 2006 Honda S2000 TT3 || Race Car: 1987 BMW 325is SpecE30 || Tow Vehicle: 2014 RAM 1500 EcoDiesel Sold Cars: 2012 BMW M3 || 2013 Subaru BRZ || 2012 Porsche Cayman R || 2009 Chevrolet Z06 || 2009 BMW M3 || 2004 BMW M3 || 2004 Nissan 350Z |
06-17-2013, 04:10 PM | #4 |
Banned
Join Date: Aug 2012
Drives: 2013 White Out FR-S
Location: Florida
Posts: 1,335
Thanks: 24
Thanked 1,162 Times in 501 Posts
Mentioned: 323 Post(s)
Tagged: 2 Thread(s)
|
Nice work for those of use who dont like to search what are your mods again....
|
The Following User Says Thank You to FA20Club.com For This Useful Post: | mad_sb (06-17-2013) |
06-17-2013, 04:27 PM | #5 |
Senior Member
Join Date: Jan 2013
Drives: 2013 Asphalt FR-S
Location: Orange County
Posts: 1,639
Thanks: 632
Thanked 981 Times in 537 Posts
Mentioned: 100 Post(s)
Tagged: 0 Thread(s)
|
FA20 CAI, Nameless Catted Over / Front Pipe, Nameless Axle Back. FA20 Oil Cooler once i get off my butt again
__________________
~Namaste~ |
06-17-2013, 04:31 PM | #6 |
Senior Member
Join Date: Jan 2013
Drives: 2013 Asphalt FR-S
Location: Orange County
Posts: 1,639
Thanks: 632
Thanked 981 Times in 537 Posts
Mentioned: 100 Post(s)
Tagged: 0 Thread(s)
|
logged is around 28*.. cam timing makes a big difference in what you can run up top as well.
__________________
~Namaste~ |
06-17-2013, 04:33 PM | #7 | |
I Love custom Turbo kits
Join Date: Mar 2012
Drives: Limited BRZ
Location: Miami
Posts: 10,770
Thanks: 20,004
Thanked 8,343 Times in 4,361 Posts
Mentioned: 441 Post(s)
Tagged: 12 Thread(s)
|
Quote:
You are awesome. Thanks a lot, lots of people will appreciate this!
__________________
|
|
06-17-2013, 05:27 PM | #8 |
Banned
Join Date: Aug 2012
Drives: 2013 White Out FR-S
Location: Florida
Posts: 1,335
Thanks: 24
Thanked 1,162 Times in 501 Posts
Mentioned: 323 Post(s)
Tagged: 2 Thread(s)
|
gimme a call later
|
06-17-2013, 06:11 PM | #9 |
Senior Member
Join Date: Jan 2013
Drives: 2013 Asphalt FR-S
Location: Orange County
Posts: 1,639
Thanks: 632
Thanked 981 Times in 537 Posts
Mentioned: 100 Post(s)
Tagged: 0 Thread(s)
|
__________________
~Namaste~ |
04-24-2020, 09:30 PM | #10 | |
VizMark Performance
Join Date: May 2012
Drives: 2014 Scion FR-S Monogram Series 6MT
Location: St Augustine
Posts: 22
Thanks: 0
Thanked 6 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 2 Thread(s)
|
Quote:
__________________
Regards,
Jeff Gray 904-566-5505 VizMark Performance |
|
|
|
Thread Tools | Search this Thread |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
BRZedit Drive By Wire Info | mad_sb | Engine, Exhaust, Transmission | 20 | 03-20-2021 01:19 PM |
BRZEdit (ECUEdit) | illmatic | Software Tuning | 246 | 06-02-2016 01:15 PM |
BRZedit Cam Tuning Info | mad_sb | Engine, Exhaust, Transmission | 11 | 01-25-2015 04:58 AM |
BRZedit tuned + Bolt-on parts | BRZPDX | Northwest | 35 | 05-21-2013 12:34 AM |
My Initial (all stock) BRZedit tune | mad_sb | Engine, Exhaust, Transmission | 6 | 02-16-2013 12:20 PM |