Search found 159 matches

by mk e
Mon Oct 19, 2020 7:12 pm
Forum: Software
Topic: How do we tune V engines - how many WBO sensors?
Replies: 6
Views: 216

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

It does indeed need per bank fuel trim - usually the exhaust is different for steering/firewall/starter clearance, which can cause a bit of difference at different load/rpm. All OEMs do this. One independent trim bank per upstream O2 sensor. +1 That is the standard. Assume the sensors are correct a...
by mk e
Fri Oct 16, 2020 12:29 am
Forum: Your car & your engine
Topic: FrankenFerrari - V12 Ferrari 308
Replies: 47
Views: 12408

Re: FrankenFerrari - V12 Ferrari 308

so here's why the engine is apart
file.jpg
file.jpg (220.13 KiB) Viewed 177 times
and the same head tonight...good as new and ready to assemble.
1602806736_20201015_194627-resized-1024_mmthumb.jpg
1602806736_20201015_194627-resized-1024_mmthumb.jpg (107.08 KiB) Viewed 177 times
by mk e
Fri Oct 16, 2020 12:26 am
Forum: Your car & your engine
Topic: Proteus v12 club
Replies: 121
Views: 11399

Re: Proteus v12 club

bill wrote:
Fri Oct 16, 2020 12:19 am

what kind of transmission is that in the pic? some kind of front wheel drive setup?
Ferrari 308...aka the FrankenFerrari
https://rusefi.com/forum/viewtopic.php?f=3&t=1499
by mk e
Thu Oct 15, 2020 3:02 pm
Forum: Your car & your engine
Topic: 2004 BMW 760 N73 "A big mistake"
Replies: 13
Views: 486

Re: 2004 BMW 760 N73 "A big mistake"

Whoa, there!...you're not planning to drive a V12 car are you? I thought there was an understanding in the club that these are projects, to talk about, share pics of and such but never actually drive? Nobody else is driving their's........ :lol: Nice find...but now I feel like the pressure is on to ...
by mk e
Tue Oct 13, 2020 11:58 am
Forum: Your car & your engine
Topic: S1000RR Motorcycle Engine
Replies: 16
Views: 385

Re: S1000RR Motorcycle Engine

That's not how staged injection works. The point of staged injection is that the second injector slowly takes over as the duty cycle increases on the first one. On car engines, it's used for engines that make huge horsepower, but need to still idle. So they might have a 300cc injector that operates...
by mk e
Tue Oct 13, 2020 1:27 am
Forum: Your car & your engine
Topic: Proteus v12 club
Replies: 121
Views: 11399

Re: Proteus v12 club

If the dowel pins line up, ... Then you are good to go and can just punch and drill the bolt holes. I read about staring by lining up starter bolt holes and really wanted to save him from a big mistake I probably need to admit making myself when I was a young and more than a little naive :cry:
by mk e
Tue Oct 13, 2020 12:52 am
Forum: Your car & your engine
Topic: FrankenFerrari - V12 Ferrari 308
Replies: 47
Views: 12408

Re: FrankenFerrari - V12 Ferrari 308

could it be a v12 going back together and smashed heads nearly ready to bolt on? It could indeed...should be back in the (running) V12 club is 5 or 6 weeks :D
by mk e
Tue Oct 13, 2020 12:45 am
Forum: Your car & your engine
Topic: Proteus v12 club
Replies: 121
Views: 11399

Re: Proteus v12 club

You're not planning to do this from a cardboard template are you? you'll destroy the pilot bearing, clutch and maybe trand in short order if that is the plan :o The centers need to be aligned.....you MIGHT get away with a 0.005" error but much more and things will go bad pretty fast. I put a V8 tran...
by mk e
Mon Oct 12, 2020 6:01 pm
Forum: Your car & your engine
Topic: S1000RR Motorcycle Engine
Replies: 16
Views: 385

Re: S1000RR Motorcycle Engine

That makes sense. For a single fuel staged injection it would make sense to do it in the third part of those calculations. Since the desired amount of fuel is mostly constant. Although I believe that with the upper injectors on the desired total fuel mass will be a little lower (this is where the e...
by mk e
Fri Oct 09, 2020 11:55 am
Forum: Your car & your engine
Topic: 1998 BMW V12 engine M73 #55
Replies: 73
Views: 29633

Re: 1998 BMW V12 engine M73 #55

AndreyB wrote:
Wed Oct 07, 2020 2:57 pm
No clear plans for this v12 so not spending any time on it.
Well get that engine a home man!
https://philadelphia.craigslist.org/pts/d/philadelphia-2000-bmw-z3-parts/7175531912.html
by mk e
Thu Oct 01, 2020 12:25 am
Forum: Your car & your engine
Topic: 1998 BMW V12 engine M73 #55
Replies: 73
Views: 29633

Re: 1998 BMW V12 engine M73 #55

The lag you're feeling on the 750i is all added by the computer - remember it's supposed to be a luxobarge, not a sports car. There are plenty of modern electronic throttle cars that are very snappy - I know my Miata certainly is and an E46 M3 is because it's ETB ITB (!). And the OEMs need to worry...
by mk e
Mon Jul 06, 2020 10:09 pm
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

Funny that you've asked today since we are working on a yet another improvement today, after being happy with scheduler for a while :) Ok...so...its been a little over 3 weeks...did the changes help or weren't really needed and more trouble than they were worth? or??????? Inquiring minds what to kn...
by mk e
Fri Jun 19, 2020 12:35 pm
Forum: Hardware
Topic: Possible future hardware low side driver CJ950
Replies: 6
Views: 755

Re: Possible future hardware

On average Bosch chips do not have detailed 90 pages datasheets. With a 2 page product information sheet there is nothing we can do about those chips. yeah, I think they make you sign an NDA and prove you're a real manufacture to get the data sheet, and that's only if they have a business plan that...
by mk e
Wed Jun 17, 2020 1:59 pm
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

It been a long time since I've touched the o5e stuff but I know I have a 5634 demo board loaded that will run when powered up. It has an eTPU crank/cam generator that we then jumper back into the ePTU crank/cam inputs for testing. The freescale engineer told me the demo eTPU code we used is the exac...
by mk e
Wed Jun 17, 2020 2:30 am
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

Thinking a bit more....I suspect the OEM need for crank position accuracy (not just precision alone) is about misfire. I'm not really sure there is another answer. For sure error multiplies but even then....I don't know. Spark timing at all rpm and and fuel pulse duration at low power they also care...
by mk e
Wed Jun 17, 2020 12:44 am
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

maybe. no doubt 1Mhz is .036 degree at 6k and if you are servicing the interrupt at that and getting the item processed before the next clock tick then I guess its a real number. The concern is that error propagates. The general rule of thumb is that if you want to pass a gauge R&R the gauge need to...
by mk e
Tue Jun 16, 2020 9:37 pm
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

The size of the timer counter isn't particularly important. The rollover logic to "extend" the timer is pretty straightforward. It's only complicated if you need to schedule events multiple rollovers in the future. Our 1mhz, 32 bit timer rolls over every 71 minutes, so that's not a concern. The 24 ...
by mk e
Tue Jun 16, 2020 9:32 pm
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

Thanks. Sadly the code means nothing to me....I can read very basic math functions, that's about it so thank you for the simple answer too :oops: Ok, so with a fixed 1Mhz clock, and a common 36 tooth wheel, say cranking at 250 rpm = 9000 teeth/min = 150 teeth/sec = 6666 clock tic/tooth I think? Acro...
by mk e
Tue Jun 16, 2020 8:32 pm
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

Question.

The timer(s) that you use, how many bits are they? Just talking with another guy about the S12/S12x stuff being 16 bit vs the newer gens of OEM chips with time coprocessors (eTPU or GTM), both I think using 24 bit timers....which made be realize I had no idea what you guys have? 16? 32?
by mk e
Mon Jun 15, 2020 10:38 pm
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

On the dyno, .5 is about 1%, maybe a bit less....depending on the engine. Older stuff that wants 30-35 degrees, .5 degree matters less. Modern stuff that might want 15-20 degrees, 0.5 matters a lot more. That said, the 0.5 average error isn't the big issue, it's the 3.5 degree random max error...tha...
by mk e
Mon Jun 15, 2020 12:13 pm
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

Got curious this morning and found some speeduino accuracy test data https://speeduino.com/forum/viewtopic.php?f=13&t=223 At 13000rpm, 3.5 degree worst case and 1 degree typical error. 1/2 that at 1/2 the rpm Some one else commented that the bosch ecus are 0.75 degree at 12000...which seems high hon...
by mk e
Sun Jun 14, 2020 2:26 am
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

Awesome....perfect is never done :)

Someone was asking me about o5e stuff today and I suggest he head over here....which reminded me of the one thing I wasn't sure is better than o5e, timing accuracy. Can't wait to see where you get it.
by mk e
Sat Jun 13, 2020 10:43 pm
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 72
Views: 21614

Re: [info] rusEfi Scheduler Performance & Accuracy

Where did you guys ever end up with the scheduler work? Decide the improvements that were made got it where you were happy?
by mk e
Sat May 30, 2020 11:22 am
Forum: Misc
Topic: How does ABS work?
Replies: 7
Views: 1667

Re: How does ABS work?

As for why you appear to have 3 valves per brake pad. I'm not sure. I know there is a cross over valve, such that if the front left brake line breaks, this valve will engage and block flow to the front left, as well as the rear right. Basically it's usually a metal ball in the brake lines. If you h...
by mk e
Tue May 12, 2020 4:24 pm
Forum: Hardware
Topic: Injector setup (find offset table)
Replies: 8
Views: 992

Re: Injector setup (find dead time)

Deadtime or offset is a function of voltage and fuel pressure so you will almost certainly NOT get a good correlation to a point value if you alter these parameters as you're describing. You can find tables in a few different control scheme formats to see what it should look like at places like this...
by mk e
Thu May 07, 2020 1:33 pm
Forum: Software
Topic: E85 / Flex fuel logic
Replies: 27
Views: 7178

Re: E85 / Flex fuel logic

winner winner chicken dinner. :) I think he no play PUBG ... You caught me, I don't play any games...they all bore the shit out of me, I just can't for the life of me understand the point of them. I make things that are real when I have time...today I'm working on retaining wall then a patio, killi...
by mk e
Sun May 03, 2020 1:45 am
Forum: Software
Topic: E85 / Flex fuel logic
Replies: 27
Views: 7178

Re: E85 / Flex fuel logic

winner winner chicken dinner. :)
by mk e
Wed Apr 29, 2020 10:39 pm
Forum: Software
Topic: E85 / Flex fuel logic
Replies: 27
Views: 7178

Re: E85 / Flex fuel logic

It should as simple as: Read fuel sensor Interpolated between E10 and E85 tuning There shouldn't be any more to it that that I don't think? It my setup I use the stoich value and mass flow so I won't use 2 tuning tables, I'd use use the stoich values to calculate required fuel volume and get the inj...
by mk e
Sun Apr 05, 2020 1:40 am
Forum: Software
Topic: Fast start features
Replies: 15
Views: 3190

Re: Fast start features

JPh wrote:
Wed Apr 01, 2020 9:00 pm
Perhaps I will enhance the starting ability by adding supercapacitor.
Or a proper battery ;)

Seriously, its easy to get caught up in trying to make something perfect and end up with something unusable or fragile instead.....I've fallen for that many times over the year :oops:
by mk e
Tue Mar 31, 2020 2:58 pm
Forum: Software
Topic: Dwell problem during starting ? No - caution at flywheel setup
Replies: 37
Views: 4390

Re: Dwell problem during starting ? No - caution at flywheel setup

That trigger wheel has both a missing and added tooth.....the scope trace looks correct I think for the wheel design I think, does the software support this style trigger wheel? It does look like the sensor should be rotated 90deg as mentioned though.