Search found 141 matches

by blundar
Tue Feb 23, 2021 9:17 pm
Forum: Dev: Software
Topic: Fw. improvement - PANIC BUTTON
Replies: 15
Views: 4882

Re: Fw. improvement - PANIC BUTTON

The way I read this, there are two somewhat independent requests. 1. Hit button - get log event. This is a pretty common feature in a lot of software I use. The idea is a very sound one. Particularly in long datalogs, it's often hard to pick out the moment(s) of greatest interest. If you have a butt...
by blundar
Tue Feb 23, 2021 4:41 pm
Forum: Dev: Software
Topic: Feature Requests - Feature Bounty Program
Replies: 29
Views: 23826

Re: Feature Requests - Feature Bounty Program

In a hostile environment, nope.
Bluetooth is a joke. Totally vulnerable to brute force plus the keyspace is tiny.
WPA2 is close but still dicey.
by blundar
Tue Feb 23, 2021 3:23 pm
Forum: Dev: Hardware
Topic: Wideband Controller: Fully Custom, no ASIC!
Replies: 130
Views: 44545

Re: Wideband Controller: Fully Custom, no ASIC!

Update 2/23: still trying to get information out of Bosch, so far unsuccessfully. Starting to try and figure out a somewhat accurate way to make calibration gases for testing
by blundar
Mon Feb 22, 2021 4:49 pm
Forum: Tuning Support: Making it Run
Topic: EFI Part numbers and sources READ ME
Replies: 5
Views: 3291

Re: EFI Part numbers and sources READ ME

Bosch LSU 4.9 Wideband sensors. Be very wary of ordering ebay/amazon/aliexpress for these sensors. They're very heavily counterfeited and copies often do not function as well as legitimate sensors. There appear to be two variants of this sensor element. One has larger holes in the tip, one has small...
by blundar
Mon Feb 22, 2021 4:20 pm
Forum: Dev: Hardware
Topic: R42 Board, for V8 engines.
Replies: 21
Views: 6053

Re: "Proteus Little"

Small suggestion: Use a ESP32 module instead of the one you have chosen. (it looks like HC06 maybe?) The ESP32 can do Bluetooth AND Wifi and is generally much more flexible. And they're very inexpensive (~$4 single here in US, < $2 in the quantity I buy them for another product, <$1 for the SoC only...
by blundar
Mon Feb 22, 2021 4:02 pm
Forum: Tuning Support: Making it Run
Topic: EFI Part numbers and sources READ ME
Replies: 5
Views: 3291

EFI Part numbers and sources READ ME

If you're interested in using rusEFI to run an engine, there is a very good chance that you're going to need to obtain sensors, solenoids, injectors, etc. to use with your engine. This thread exists to archive part numbers for common and useful parts along with places to get them and approximate cos...
by blundar
Sat Feb 13, 2021 6:45 pm
Forum: Dev: Hardware
Topic: On-board MAP sensor MPX4250AP alternatives
Replies: 8
Views: 2625

Re: On-board MAP sensor

^^^ Which is awesome Matthew. Perfect solution.
by blundar
Sat Feb 13, 2021 6:40 pm
Forum: Dev: Hardware
Topic: Wideband Controller: Fully Custom, no ASIC!
Replies: 130
Views: 44545

Re: Wideband Controller: Fully Custom, no ASIC!

Update 2/13: Spent many hours this week trying to get in touch with someone at Bosch on the phone. Sent many emails. No response so far. If anyone happens to know someone at Bosch who may be willing to help and is in the automotive sensor division, please get in touch with Matthew or I.
by blundar
Fri Feb 12, 2021 4:03 pm
Forum: Dev: Hardware
Topic: Discrete components VR decoder with zero firmware code
Replies: 59
Views: 18048

Re: Discrete components VR decoder with zero firmware code

This is the schematic of the triple VR decoder used in the Honda ECUs. Literally millions of this circuit were in production - every Civic and integra produced from 1992 to 2000 used this.
1992 Honda discrete VR decoder
1992 Honda discrete VR decoder
honda VR 1992.png (575.53 KiB) Viewed 8237 times
by blundar
Fri Feb 12, 2021 3:51 pm
Forum: Dev: Hardware
Topic: On-board MAP sensor MPX4250AP alternatives
Replies: 8
Views: 2625

Re: On-board MAP sensor

Something with a minimum of 4 bar capability and the ability to have a barometric pressure sensor as well? Worst case offer the ability to upgrade to a different sensor and utilize the mpx4250ap as the barometric sensor. None of the decent pressure sensors I know of have integrated baro. If you wer...
by blundar
Fri Feb 12, 2021 3:49 pm
Forum: Dev: Hardware
Topic: On-board MAP sensor MPX4250AP alternatives
Replies: 8
Views: 2625

Re: On-board MAP sensor

I've used the MPXH6xxx sensors with great success. They come in a ported version but they're MUCH physically smaller than the 4250AP. They come in 2.5bar (6250) 3bar (6300) and 4 bar (6400). They're SOP8 so easy to solder, very linear, good temperature characteristics, very high quality, generally a...
by blundar
Sun Dec 27, 2020 12:58 am
Forum: Dev: Software
Topic: Limp Home and Engine Protection
Replies: 18
Views: 5996

Re: Limp Home and Engine Protection

I think my asks are going to be more of a 2.0 than a 1.0 but... Error handling is soooo critical. I think that this splits into two pieces: 1. Define conditions that cause an error count 2. Define how to respond to a given error The nice thing about this is that some existing functions (like a rev l...
by blundar
Thu Nov 05, 2020 4:32 am
Forum: Tuning Support: Making it Run
Topic: Why this forum exists?
Replies: 0
Views: 3966

Why this forum exists?

This forum exists for a simple reason: many users struggle to get their engine running well because of the garbage they put in, not the tool they are using. Just as it is possible to create ugly pictures with great paintbrushes, it's entirely possible to make a great engine run very poorly with a gr...
by blundar
Mon Oct 19, 2020 5:08 pm
Forum: Dev: Software
Topic: How do we tune V engines - how many WBO sensors?
Replies: 6
Views: 2483

Re: How do we tune V engines - how many WBO sensors?

^^^ what he said. Additionally, it's fairly easy to check if cylinders are assigned to the wrong sensor. 1. in closed loop, make a significant but non-life threatening change to the fueling on a cylinder (10-20%) 2. Observe which sensor(s) see the AFR deflection 3. Rinse, repeat #1 and #2 until all ...
by blundar
Sun Sep 27, 2020 10:45 pm
Forum: User Support
Topic: Soldering tricks & hints
Replies: 52
Views: 28767

Re: Soldering tricks & hints

Andrey asked me to explain what I'm using for desoldering ECU connectors off OEM ECUs. I have two tools that I use for this. One is a small wave solder machine / solder pot. It's a medium size (~100kg reservoir, ~3000W, ~150kg total machine weight) solder pot. It heats a reservoir of solder to melti...
by blundar
Sun Sep 06, 2020 3:01 am
Forum: Tuning Support: Making it Run
Topic: AFR target table
Replies: 15
Views: 6312

Re: AFR target table

I would completely make use of the PE vs. non-PE modes on my RB20DET skyline because it's so easy to make boost at low throttle angles going up a hill.
by blundar
Sun Sep 06, 2020 3:00 am
Forum: Tuning Support: Making it Run
Topic: AFR target table
Replies: 15
Views: 6312

Re: AFR target table

For cable throttle: 1. VE table for airflow and just airflow. 2. Pressure vs. maximum lambda (leanest allowable commanded) Why? So you don't end up at 1.1 lam @ 220kpa @ 3000 RPM on a small-turbo car 3. TPS vs RPM for power enrichment mode enable 4a. Power enrichment: RPM vs target lambda table, pre...
by blundar
Mon Aug 31, 2020 1:38 pm
Forum: Tuning Support: Making it Run
Topic: AFR target table
Replies: 15
Views: 6312

Re: AFR target table

I think this way of handling fuel (driver demand based, essentially) is a great idea. I'd do a similar thing on my skyline as it's entirely possible to get a couple pounds of boost at 3000RPM at 15% throttle going up a hill - and I have no desire to be at .8 there. Being able to modify or otherwise ...
by blundar
Wed Dec 07, 2016 2:21 pm
Forum: Dev: Software
Topic: Post cranking goes lean
Replies: 10
Views: 6032

Re: Post cranking goes lean

My bad... I misunderstood at first reading. There are typically two enrichments: 1. long term CLT vs. enrichment (I described previously, not what was being discussed) 2. short term "post startup" enrichment immediately after crank (what the topic was, I missed it first go) #2 is implement...
by blundar
Tue Dec 06, 2016 4:18 am
Forum: Dev: Software
Topic: Post cranking goes lean
Replies: 10
Views: 6032

Re: Post cranking goes lean

Post startup enrichment is pretty common...

extra% vs CLT is very simple. works fine.

Some systems adjust the target lambda / eq mix. Some add %. As long as you're not trying to pass emissions you can be very crude.
by blundar
Thu Dec 10, 2015 3:04 am
Forum: Dev: Software
Topic: CAN support
Replies: 68
Views: 34902

Re: CAN support

A friend of mine worked on a J2534 interface using a STM32F103. He got most of the way done with it. Is your friend planning to release this as a $49 product or open design by any chance? Is he doing smth for himself or a commercial product? My friend is intending to release it as a commercial prod...
by blundar
Thu Dec 10, 2015 3:00 am
Forum: Dev: Software
Topic: CAN support
Replies: 68
Views: 34902

Re: CAN support

And in case it wasn't clear from the last post... 95 or 99% working doesn't cut it for a J interface. Many computers can cost $500-1000 to replace if you fuck them up. Bricking computers while programming is extremely undesirable. A lot of what you're paying for with the more expensive J interfaces ...
by blundar
Thu Dec 10, 2015 2:56 am
Forum: Dev: Software
Topic: CAN support
Replies: 68
Views: 34902

Re: CAN support

And $250 is CHEAP for a J interface! My MyCanic was about $800 when I got it and the CarDAQ plus my buddy has was close to $1600 new) I guess that's the part which I am failing to comprehend. How comes there is no such thing as a $49 open hardware/open source J2534? well... There is a lot of nitty ...
by blundar
Wed Dec 09, 2015 4:35 am
Forum: Dev: Software
Topic: CAN support
Replies: 68
Views: 34902

Re: CAN support

Andrey, you're making this too hard. CAN is just like ethernet or USB (well not JUST like) - it's a transport mechanism. It's almost as inconsequential as TCP/IP is for delivering movies with Netflix. It's a means to an end, that's all. There are some standards and conventions, but no magic. The hig...
by blundar
Fri Nov 06, 2015 2:35 am
Forum: You and your build
Topic: 3S-FE soon to be 3S-GTE 1995 Rav4 2door
Replies: 14
Views: 8661

Re: 3S-FE soon to be 3S-GTE 1995 Rav4 2door

and toyota vr sensors tend to age poorly and are very finicky to deal with. specifically very low voltage output at low rpm while cranking.
by blundar
Fri Nov 06, 2015 2:34 am
Forum: You and your build
Topic: 3S-FE soon to be 3S-GTE 1995 Rav4 2door
Replies: 14
Views: 8661

Re: 3S-FE soon to be 3S-GTE 1995 Rav4 2door

12 evenly spaced teeth on crank wheel
1 tooth on cam sensor
mag (VR) sensors
by blundar
Tue Dec 23, 2014 5:27 am
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 70
Views: 41602

Re: Ignition modules

Why are you making things so hard? Denso "pencil" coils come in all shapes and sizes with 3 or 4 pin connectors. Toyota uses them. Honda uses them. Nissan uses them. Mitsufeces uses them. Subaru use them. They support ~150-200hp/cylinder with a 0.020" spark gap and a copper plug or 0....
by blundar
Tue Dec 23, 2014 5:15 am
Forum: Dev: Software
Topic: Powershifting?
Replies: 3
Views: 2830

Re: Powershifting?

The "semi-proper" thing to do is put a strain gauge on the shifter. Many higher-end sequential transmissions actually require this. The idea is that the strain gauge picks up force on the shifter, momentarily kills power from the engine (usually kills spark) and allows the shift to happen ...
by blundar
Sun Dec 21, 2014 4:24 pm
Forum: You and your build
Topic: 2003 Dodge Neon (#9)
Replies: 109
Views: 74543

Re: 2003 Dodge Neon (#9)

That's pretty cool. We'll make a tuner out of you eventually, Andrey. Maybe. :)
by blundar
Fri Dec 05, 2014 6:54 pm
Forum: Misc
Topic: LS swap: rusEfi as a piggyback?
Replies: 5
Views: 4355

Re: LS swap: rusEfi as a piggyback?

Trans control is something we have not yet gotten into. I'm a thumbs up from a hardware support side of it. Do you have a schematic of either side of this transmission? Either something that shows the car side and what's connected to it, or even better would be something that shows the internals. H...