Dumb, Stubborn, and bound to end up penniless…….

[aklackner]

One more long term goal coming into focus: data acquisition.

After early experience with the s300 (~3 years ago) I found the mobile/data options limited, the punch line is that mobile options have expanded and would very likely meet my needs now but I’ve already added a GPS antenna and wired things for a dedicated (RaceCapture Pro mk3) system.

The RaceCapture system is an affordable unit more oriented to DIY crowds than some big name brands but is also incredibly featured, even more so if you’re not averse to learning some Lua scripting.

The RaceCapture has a built in accelerometer, gps, Bluetooth, and wifi systems. Several inputs are available for 5v and hall sensors, (2)CAN networks provide deep expansion options.

I’ve been feeding oil pressure, and oil temp as direct 5v, GPS from the roof mounted antenna and today I was able to get input from the s300 worked out via the CAN network.

I’m still working a few things out mostly to get some data values properly converted and may do a bit of sniffing to see if there’s some other data flowing out from the s300 but I have most of the basics now covered and plenty of inputs remaining to expand things like WMI status, steering angle,or basically as complex as I’d like to get over time.

I’ll also need to workout what’s worth getting onto the phone display, program critical warnings to pop up, and configure automatic logging (to SD).

[oddomatik]

One more long term goal coming into focus: data acquisition.

Really looking forward to seeing what you come up with. I have been super interested in data and displays as a teenager in the "carputer" days with spinning hard drives and black and white screens. Raspi with bluetooth makes anything possible! The products out there these days are fantastic too if you don't mind dropping the $$$$$.

[coolhandluke]

I was thinking someone brought up RaceCapture before, I found the thread and it was you!
viewtopic.php?f=5&t=513&p=6846&hilit=da ... tion#p6846

If we want to migrate the conversation into a dedicated thread it might be cleaner. I'll ask some friends with AiM experience to chime in as well.

[aklackner]

I was thinking someone brought up RaceCapture before, I found the thread and it was you!
viewtopic.php?f=5&t=513&p=6846&hilit=da ... tion#p6846

If we want to migrate the conversation into a dedicated thread it might be cleaner. I'll ask some friends with AiM experience to chime in as well.

Yeah the RaceCapture system is a toy I’ve wanted to get implemented for awhile. I had it in before the s300 reading oil temp, oil pressure, and manifold pressure from 5v sensors but could get it to read obd2 from OEM ecu for some reason (though I didn’t really try that hard).

If there’s interest I can create a dedicated thread with what I’ve learned so far and update as I figure how to move the data around better for analysis. Maybe at some point I’ll take a more serious shot at communicating with the oem ecus. If I get this worked out it would provide a consistent logging system regardless of ecu I run then.

I just shared my configuration file on request from the developer so they can update presets they provide for kpro and s300. Hopefully it makes the system even more plug and play for Hondata users.

I still have to decide if I’ll try to implement their TireX system I picked up during the kickstarter for it. In theory continual thermal imaging the tires would provide great data and with the RaceCapture system already up and running it should only be a matter of mounting the sensors, running the harness, and importing the presets. I’m just not sure I’d ever be at a point as a driver to put the data to use.

[aklackner]

I had to push the tuning appointment back a week since I picked up a head cold and didn’t want to be sitting around a shop all gross and feeling lousy.

On the upside it gives me a bit of time to make a few last changes.

The last week or so I’ve been trying to get a better understanding of the “tables” smanage by running through a basic efi tuning course online (one of the ones included in a HPA package I bought).

Looking at the baseline in smanage and doing reading the RDX injectors are likely to be running above 90% duty cycle. Given that the RDX is rated at 270bhp I probably would be ok but decided to go up to a set of 550cc/min injectors. I ordered a set from RC but was going to be about 2 weeks since they’re backordered. So canceled that and ordered a set of deatschwerks injectors. I should get them Tuesday. The Deatschwerks are lower cost but I liked that they seem to publish more detailed data (battery offsets at multiple voltages, flow at range of pulse widths, etc). If they are an issue I can always drop the RDX injectors back in to at least get a tune down.

Also I’m still playing with the Blox billet TB. Seems they don’t actually have a gasket for the 66mm unit (something about their move to SoCal) and the paper gasket they have for the 70mm they sent me looks like it would have a vacuum leak due to overlap between idle adjustment and IACV inlet on Honda manifolds? So I ordered some Sealing grade PTFE sheet (1/16”) and roughed out my own.

Blox gasket on OEM IM (vacuum leak between IACV inlet and idle air outlet)

Custom ptfe gasket

[oddomatik]

Also I’m still playing with the Blox billet TB. Seems they don’t actually have a gasket for the 66mm unit (something about their move to SoCal) and the paper gasket they have for the 70mm they sent me looks like it would have a vacuum leak due to overlap between idle adjustment and IACV inlet on Honda manifolds? So I ordered some Sealing grade PTFE sheet (1/16”) and roughed out my own.

Looks really good... I've been thinking about a laser cutter as I get into CNC stuff...

https://www.d-series.org/threads/jrsc-j ... st-5169088

[aklackner]

I got the Blox billet TB in. Much smoother than Edelbrock but I guess I knew that already.
I ran into an issue with the OEM GSR throttle cable holder but I made some minor adjustments to make things work out. I was able to get idle reset without an issue. Throttle control

[aklackner]

Little feature with me and 01-0386 from Radwood.(@~31:15)

https://youtu.be/6Rv1NbbGMRM

[oddomatik]

Little feature with me and 01-0386 from Radwood.(@~31:15)

https://youtu.be/6Rv1NbbGMRM

If only the other viewers knew there were 78 pages of drama, struggle, victory, and engineering porn to go along with the car! You are humble!

[aklackner]

New injectors are in, but this stuff is so frustrating. I chose Deatschwerks specifically because they provide more data to enable accurate tuning.

Well when you actually try to use that data (battery offset and flow at multiple pressures) the car barely idles. Now this is where it gets really confusing, you don’t know if the issue is that the provided information is wrong or the baseline. If the original tuner of the baseline didn’t have accurate dead time or flow data for the injectors used they would have approximated. Any variation from real values would be encapsulated in the fuel tables. An additional consideration is that at low pulse rates (<2ms, like you may have at idle) injectors are non-linear, meaning they may flow a lower rate than they will once into higher duty cycles. So differences here should be compensated for with increasing fueling duration in these zones but amount will vary by injector.

Now for my new injectors Deatschwerks provided injector flow tests of the actual injectors. These show rates for the set averaging to 588cc/min @43.5 psi,13.7v. My fuel pressure gauge (at fuel filter) registers ~50psi idle w/ vacuum - ~60psi w/o vacuum. This should put the injectors between the claimed 3bar and 4bar differential pressure ranges or 616- 718 cc/min. My voltage reads ~14v at idle as well and testing is conducted @13.7v. So testing data should be very representative.

However, with the new injectors the car only idles properly with single digit fuel trim if 550cc/min is used for injector rate with dead time about 3x the provided values in the 14v range (specifically hondata’s preset times for deatschwerks 660 injectors)?

Well at least it seems to idle properly and as long as it drives to Church, I suspect they can work the rest out. There should be plenty of fuel supply now so it’s one less thing to cause an issue for them. I’ll try to take a drive tomorrow and datalog it to validate AF ratios aren’t off the charts outside of idle. My biggest concern is that on the dyno atmospheric conditions are very static, it’s not until atmospheric conditions shift that issues with dead times would present due to compensation amplifying the corrections encapsulated in the fuel tables.

I also threw in a fresh set of ngk platinum laser plugs gapped down to .035”(.89mm).

While I had the injectors disconnected and plugs out I ran a compression test just to confirm everything still looked as expected. Read 230psi on cylinders 1,2,&4. Cylinder 3 read 225psi or ~2% variance. Good enough to set my mind at ease that there’s not some issue lurking that would prevent a successful tune.