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Search: Posts Made By: bobxyz
Forum: performance & modifications Yesterday, 03:16 PM
Replies: 287
Views: 7,553
Posted By bobxyz
Wow, you folks have been busy. For everyone who...

Wow, you folks have been busy. For everyone who is contributing clear and useful information, THANK YOU! It's always great to learn new things from those who are willing to share and who can teach...
Forum: performance & modifications 06-15-2021, 11:21 PM
Replies: 287
Views: 7,553
Posted By bobxyz
OK, let's talk topology. Here's your first...

OK, let's talk topology. Here's your first recommendation:



This is the same exact topology that I referenced. It may look a bit different in the datasheet (page 18) because the datasheet...
Forum: performance & modifications 06-15-2021, 03:05 PM
Replies: 287
Views: 7,553
Posted By bobxyz
I'd love to know what an actual expert would say...

I'd love to know what an actual expert would say about HK's recommended controller chip and example designs.

For those following this thread with access to real EV Inverter design engineers, and...
Forum: performance & modifications 06-15-2021, 01:25 PM
Replies: 287
Views: 7,553
Posted By bobxyz
I'm at work so this will be brief. HK, cut...

I'm at work so this will be brief.

HK, cut the crap. Quit recommending that hobbyists make their own high voltage motor controllers using ebay amplifier modules, 30 year old small motor...
Forum: performance & modifications 06-14-2021, 12:11 AM
Replies: 287
Views: 7,553
Posted By bobxyz
It's way over budget, but here are some really...

It's way over budget, but here are some really rough and optomistic cost guesses to convert a 240/740/940 RWD brick to a very basic full EV using a donor Lexus GS450H.

Let's start with a salvage...
Forum: performance & modifications 06-12-2021, 12:31 PM
Replies: 287
Views: 7,553
Posted By bobxyz
That chip and evaluation board are for open loop...

That chip and evaluation board are for open loop control of small motors, not for automotive traction motors. Think cordless drill, handheld vacuum cleaner, or toy RC car.
Forum: performance & modifications 06-12-2021, 12:39 AM
Replies: 287
Views: 7,553
Posted By bobxyz
I was curious about the Lexus GS450H...

I was curious about the Lexus GS450H possibilities so I did a little more surfing. My rough understanding is as follows.

The Lexus ~2006-2011 GS450H is RWD hybrid luxury sedan and uses a 6-cyl...
Forum: maintenance & nonperformance 06-11-2021, 08:55 PM
Replies: 20
Views: 470
Posted By bobxyz
Clip a meter or a test light to the blue coil...

Clip a meter or a test light to the blue coil power wire and a nearby ground. Check that you have +12volts when you turn the key on AND while cranking. If the ignition switch is flakey, it might...
Forum: maintenance & nonperformance 06-11-2021, 06:50 PM
Replies: 8
Views: 500
Posted By bobxyz
What do the rear turn signals, and side markers...

What do the rear turn signals, and side markers (if you have them), do? If you find a bulb that's not blinking at all, it might be shorted internally causing the relay to short cycle. You can try...
Forum: maintenance & nonperformance 06-11-2021, 09:06 AM
Replies: 4
Views: 333
Posted By bobxyz
The sensor determines when the fan turns on. ...

The sensor determines when the fan turns on. From your brickboard post, a '91 R12 sensor will turn on sooner (at a lower pressure) than a '93 R134a sensor. The fan turning on earlier won't hurt...
Forum: maintenance & nonperformance 06-10-2021, 11:38 PM
Replies: 4
Views: 333
Posted By bobxyz
See last picture (click for bigger) and comments...

See last picture (click for bigger) and comments here: http://forums.turbobricks.com/showpost.php?p=5994144&postcount=63

Currently, I don't have a front A/C electric fan in my '85 (mechanical fan...
Forum: performance & modifications 06-10-2021, 08:47 PM
Replies: 287
Views: 7,553
Posted By bobxyz
Is the Lexus GS450H gearbox part # 263241762 ? ...

Is the Lexus GS450H gearbox part # 263241762 ? If so, those seem pretty $$$ reasonable on ebay: https://www.ebay.com/b/Complete-Auto-Transmissions-for-Lexus-GS450h/171115/bn_20971871

Wonder how...
Forum: maintenance & nonperformance 06-10-2021, 07:47 PM
Replies: 13
Views: 487
Posted By bobxyz
Automotive Belt Sander (or sometimes called a...

Automotive Belt Sander (or sometimes called a Belt Surfacer, or Platen Grinder) in action: https://www.youtube.com/watch?v=_X091HmGt7M
Forum: performance & modifications 06-07-2021, 09:04 AM
Replies: 5
Views: 558
Posted By bobxyz
Either speedo will work. Are you going to mount...

Either speedo will work. Are you going to mount it in the main cluster? If so, I'd pick the easiest to adapt/mount.

Yes, you want the 12 pulse output for the LH2.4 VSS wire. If it's not...
Forum: aftermarket engine management 06-05-2021, 02:23 PM
Replies: 37
Views: 6,476
Posted By bobxyz
The stuffed boards showed yesterday and they look...

The stuffed boards showed yesterday and they look nice! I'm really impressed - the design files were uploaded late a week ago Wednesday (5/26), and I have 10 fab'd and assembled boards in hand (6/4),...
Forum: aftermarket engine management 06-05-2021, 01:51 PM
Replies: 45
Views: 3,365
Posted By bobxyz
The datasheet doesn't say explicitly, but I'd...

The datasheet doesn't say explicitly, but I'd sure expect that the 15KHz is the tooth rate (i.e. 15000 rpm with a 60-tooth wheel). Odds are that the sensor will operate much faster, and that the...
Forum: performance & modifications 06-05-2021, 12:52 PM
Replies: 5
Views: 558
Posted By bobxyz
Ahh, another gem from Art. The '93 940 speedo...

Ahh, another gem from Art. The '93 940 speedo pins are:
1 - ground
2 - 48pulse output to ABS (unused for you)
3 - switched +12v power
4 - pulse input from VR differential sensor
5 -...
Forum: performance & modifications 06-03-2021, 09:29 AM
Replies: 287
Views: 7,553
Posted By bobxyz
^^^ Thanks! That's great info - I'll need to...

^^^ Thanks! That's great info - I'll need to spend some time looking up those parts. I guess an e-conversion on a TBricks budget, or most anyone's budget, is out of the question at this time. Do...
Forum: maintenance & nonperformance 06-03-2021, 09:19 AM
Replies: 28
Views: 2,802
Posted By bobxyz
Picture of disti alignment at TDC (it's off a tad...

Picture of disti alignment at TDC (it's off a tad - the hold-down bolt hole isn't quite centered in the picture). Notice the scribe mark in the edge of the disti housing versus the tip of the rotor:...
Forum: maintenance & nonperformance 06-01-2021, 07:36 PM
Replies: 4
Views: 515
Posted By bobxyz
I know what you're talking about. I always...

I know what you're talking about. I always assumed that the coolant holes in the gasket were sized to adjust the cooling.

If you go down the two sides of the gasket, the holes are:
Exhaust...
Forum: maintenance & nonperformance 06-01-2021, 07:27 PM
Replies: 9
Views: 716
Posted By bobxyz
Do you mean the foam rubber encased hard lines...

Do you mean the foam rubber encased hard lines with the triple bends shown here (click for full size)? AFAIK, those are 100% original and I've never seen anything different....
Forum: performance & modifications 05-29-2021, 06:15 PM
Replies: 287
Views: 7,553
Posted By bobxyz
Oh, that's not much of a budget. A LS swap is...

Oh, that's not much of a budget. A LS swap is much more, and that's _just_ an engine swap.

Adding an e-Alternator seems like it might work, and would give better acceleration from standstill. ...
Forum: aftermarket engine management 05-27-2021, 11:21 PM
Replies: 37
Views: 6,476
Posted By bobxyz
I stayed up late last night and finished off the...

I stayed up late last night and finished off the PCB design. Sent my money off to 深圳市嘉立创科技发展有限公司...
Forum: performance & modifications 05-25-2021, 08:06 PM
Replies: 8
Views: 1,270
Posted By bobxyz
See:...

See: http://forums.turbobricks.com/showpost.php?p=6058707&postcount=208
Forum: maintenance & nonperformance 05-24-2021, 01:55 PM
Replies: 37
Views: 3,483
Posted By bobxyz
Well, the fuel has to be coming from either the...

Well, the fuel has to be coming from either the mechanical K-Jet injectors or the electric start injector. If the pie plate/distributor seem good, and you don't have any leaking, I'd look at the...
Forum: maintenance & nonperformance 05-24-2021, 09:38 AM
Replies: 37
Views: 3,483
Posted By bobxyz
Hi Charlie, happy Monday. Is the pie plate /...

Hi Charlie, happy Monday. Is the pie plate / fuel distributor sticking open every once in a while? Not sure why this would favor #2 though.
Forum: maintenance & nonperformance 05-24-2021, 12:33 AM
Replies: 37
Views: 3,483
Posted By bobxyz
What exactly do you mean by fouled? Carbon...

What exactly do you mean by fouled? Carbon fouled on tip and insulator? Oily? Wet? Getting carbon fouling after 5 starts seems pretty weird.

Have you checked that the oil separator isn't...
Forum: aftermarket engine management 05-19-2021, 11:09 PM
Replies: 37
Views: 6,476
Posted By bobxyz
Status Du Jour: Design, parts selection, and...

Status Du Jour: Design, parts selection, and schematics are good. Initial PCB sizing, to match an Arduino Leonardo R3 Shield, and placement seem fine. Learning the layout tools and routing is...
Forum: aftermarket engine management 05-19-2021, 08:37 PM
Replies: 125
Views: 8,530
Posted By bobxyz
</ramble on> Let's try this again. ...

</ramble on>
Let's try this again. Here's a link to a ~2003 Bosch ignition modules doc:
www.pim-engineering.com/tiedostot/ignitionmodules.pdf

My read of this [aka good guess] is that there were...
Forum: aftermarket engine management 05-19-2021, 09:18 AM
Replies: 125
Views: 8,530
Posted By bobxyz
I've never had much luck finding good Bosch...

I've never had much luck finding good Bosch datasheets for 30+ year old parts. From an old ausrotary.com post, here's the best I have on the recommended coil to go with the 137 module:

You could...
Forum: performance & modifications 05-15-2021, 11:54 AM
Replies: 5
Views: 1,579
Posted By bobxyz
The 0 261 201 012 is the correct Turbo EZK box...

The 0 261 201 012 is the correct Turbo EZK box for LH2.2. From here https://brickboard.com/FAQ/700-900/EngineFIComputer.htm#ECUAMMReferenceChart
you want a 0 280 000 541 Turbo ECU box.

What are...
Forum: aftermarket engine management 05-09-2021, 08:41 PM
Replies: 1
Views: 1,571
Posted By bobxyz
Basic connection problems could be an old...

Basic connection problems could be an old worn-out USB cable -- try a new(ish) one.

Otherwise, I'd be looking for poor power or ground connections. Can you check the voltages with a meter at the...
Forum: aftermarket engine management 05-09-2021, 08:23 PM
Replies: 37
Views: 6,476
Posted By bobxyz
Status: I'm still looking at options to use an...

Status: I'm still looking at options to use an Arduino Leonardo 32U4 cpu with external buffer circuits to give good hysteresis and noise tolerance. I want to stay with the 32U4 so that I can use a...
Forum: maintenance & nonperformance 05-07-2021, 09:23 PM
Replies: 13
Views: 1,934
Posted By bobxyz
OK, do you have anything else non-factory that's...

OK, do you have anything else non-factory that's been connected to the "ign" wire during the MS install?

Most likely, something gets powered on by MS, which then back-powers the "ign" wire, and...
Forum: maintenance & nonperformance 05-07-2021, 08:08 PM
Replies: 13
Views: 1,934
Posted By bobxyz
If you connect the dashboard lamp to the wrong...

If you connect the dashboard lamp to the wrong spade on the alternator, it can provide an alternate path for +12v when the key is off.
Forum: maintenance & nonperformance 05-07-2021, 07:54 PM
Replies: 13
Views: 1,934
Posted By bobxyz
Let me guess, you've connected the power to the...

Let me guess, you've connected the power to the main MegaSquirt relay to something other than _direct_ from the ignition switch?

If so, can you sketch out how your MS main/fuel relays are wired...
Forum: aftermarket engine management 05-04-2021, 11:12 PM
Replies: 37
Views: 6,476
Posted By bobxyz
I'm making progress on the design, but am not...

I'm making progress on the design, but am not quite there yet. Here's what the schematics look like currently (click for bigger):
https://i.ibb.co/j66KQr9/Schematic-in-progress-2021-05-04.png...
Forum: maintenance & nonperformance 05-01-2021, 02:28 PM
Replies: 7
Views: 1,779
Posted By bobxyz
I think it's the 91 ABS system that has an extra...

I think it's the 91 ABS system that has an extra converter box between the differential sensor and the speedometer. I've never seen one, but try looking behind the glovebox. What's the Kxxxx number...
Forum: maintenance & nonperformance 05-01-2021, 11:11 AM
Replies: 7
Views: 1,779
Posted By bobxyz
Sounds like the speed sensor in the differential,...

Sounds like the speed sensor in the differential, what Volvo calls the Speedometer Impulse Sender, is too far away from the slotted wheel inside the differential. For the pre ABS cars, this can be...
Forum: maintenance & nonperformance 05-01-2021, 11:04 AM
Replies: 7
Views: 1,883
Posted By bobxyz
It's completely normal on any car of that era for...

It's completely normal on any car of that era for lots of the dashboard lights to turn on when the alternator isn't working. This is used as a bulb check before starting the car. If the alternator...
Forum: projects & restorations 04-29-2021, 01:12 PM
Replies: 6
Views: 2,576
Posted By bobxyz
Why LH2.2 and not LH2.4? LH2.4/EZ116K has...

Why LH2.2 and not LH2.4?

LH2.4/EZ116K has much better tuning and chipping support, which will help with your non-factory setup. [The 123 distributors do give you ignition tuning capability, but...
Forum: aftermarket engine management 04-26-2021, 11:54 PM
Replies: 37
Views: 6,476
Posted By bobxyz
Sorry, I haven't had as much time as expected to...

Sorry, I haven't had as much time as expected to work on this project in the last few days, and haven't had time to fully follow all the recent discussions.

I'm still planning on using simple RC...
Forum: aftermarket engine management 04-23-2021, 08:51 AM
Replies: 37
Views: 6,476
Posted By bobxyz
I don't know how bad the electrical noise will...

I don't know how bad the electrical noise will be. I'm planning to start with simple passive filters (Rs and Cs), and just resistor dividers to get to 3.3v logic levels. For sampling the inductive...
Forum: aftermarket engine management 04-22-2021, 02:40 PM
Replies: 37
Views: 6,476
Posted By bobxyz
If you're talking about a 240 with an electronic...

If you're talking about a 240 with an electronic speedometer, then yes, a pre-processed and filtered VSS signal is easily available. The filtering circuits are on the speedometer PCB. The signal...
Forum: aftermarket engine management 04-22-2021, 08:06 AM
Replies: 37
Views: 6,476
Posted By bobxyz
Glad to hear that you can use jlcpcb.com. That...

Glad to hear that you can use jlcpcb.com. That makes it easier for anyone to order boards directly, instead of my needing to figure out customs and international shipping.

I was going to use...
Forum: performance & modifications 04-22-2021, 12:15 AM
Replies: 28
Views: 7,750
Posted By bobxyz
Thanks, just call us "geeks at play" ;) If...

Thanks, just call us "geeks at play" ;)

If you're interested, here's the high level view. The LH Jetronic system splits the engine control between the EZK box (ignition) and the ECU box...
Forum: performance & modifications 04-21-2021, 06:54 PM
Replies: 3
Views: 1,770
Posted By bobxyz
Be nice to this guy and offer to split the...

Be nice to this guy and offer to split the profits on any parts that you sell instead of using yourself.

The Turbo Fan Shrouds are increasingly rare and, if there's two, the extra will pay for...
Forum: aftermarket engine management 04-21-2021, 07:50 AM
Replies: 37
Views: 6,476
Posted By bobxyz
Hi Diego, Wow, you've done a lot of work! Very...

Hi Diego, Wow, you've done a lot of work! Very nice.

A couple years ago, I started to work on a similar project to monitor LH2.4+EZK using a simple Arduino board. I wanted
- a dashboard...
Forum: performance & modifications 04-19-2021, 11:10 PM
Replies: 28
Views: 7,750
Posted By bobxyz
I didn't have time to take any additional...

I didn't have time to take any additional measurements, but I did figure out how to easily fool the EZK Knock detection so that it doesn't cause a CEL. CEL is short for Check Engine Light, the...
Forum: performance & modifications 04-19-2021, 08:55 AM
Replies: 28
Views: 7,750
Posted By bobxyz
apollokid - I agree that real measurements from a...

apollokid - I agree that real measurements from a running engine are much better. My benchtop setup is limited. 3 temperature resistors (normal, hot, cold), no O2 control (sensor usually...
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