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Search: Posts Made By: Lorenfb
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Forum: 964 Forum
03-15-2019, 08:27 PM
Replies: 79
Views: 20,439
Posted By Lorenfb

The varistor is used to prevent an excessive...

The varistor is used to prevent an excessive motor startup current, i.e. before the back EMF of the motor occurs.
It really can't damage the motor, and is used to protect the circuit board traces....
03-15-2019, 08:16 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

1. Yes, the 2170 cell is better in the M3 than...

1. Yes, the 2170 cell is better in the M3 than the 18650 in the MS/MX.
2. Drivetrain? Provide info. Oh yes, Tesla followed Nissan by using a PM motor (more efficient) in the M3 vs an AC motor in the...
03-15-2019, 01:13 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

1. The MY should have been the M3 at the $35K...

1. The MY should have been the M3 at the $35K price point THREE YEARS AGO!!!!!!
2. At the actual delivery date, i.e. probably 2021, the marketplace will be super competitive for the MY.
3. The...
Forum: 964 Forum
03-15-2019, 12:49 PM
Replies: 79
Views: 20,439
Posted By Lorenfb

1. The microprocessor chip(uP) used was an 8 bit...

1. The microprocessor chip(uP) used was an 8 bit microcontroller with OTP (one time programmability via EPROM technology).
The last 4 bit microprocessor available/used in designs was in the mid to...
03-15-2019, 11:29 AM
Replies: 774
Views: 53,684
Posted By Lorenfb

The Tesla Model Y (MY) arrives, and it's a big...

The Tesla Model Y (MY) arrives, and it's a big yawn! The MY is just a lower cost MX, as is the M3 a lower cost MS. Leave it to Tesla to be incompetent in its product strategies.
03-09-2019, 05:15 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

Interesting read: ...

Interesting read:





https://seekingalpha.com/article/4247546-tesla-shareholders-must-separate-ideology-investment
03-05-2019, 12:06 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

Many appear to ignore this fact, and that the...

Many appear to ignore this fact, and that the mass BEV market is less than $25K especially when the consumer considers his perceived BEV negatives, i.e. charging time & range.
03-04-2019, 11:00 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

Yes, most here know accounting basics. Why not...

Yes, most here know accounting basics. Why not actually present some Tesla numbers like:

Gross sales for 2018 - $21B ($21 x 10^9)
Unit sales - 245,000 (2.45 x 10^5), ASP $84K
GP - $4B ($4 x...
03-04-2019, 01:21 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

And in what future quarter will Tesla be...

And in what future quarter will Tesla be profitable with a marginal M3 GP?



An then we have a repeat of the 2016 M3 reservation scam quoting overly optimistic delivery times. Remember, in 2016...
03-04-2019, 01:56 AM
Replies: 774
Views: 53,684
Posted By Lorenfb

Tesla euphoria exists over there too: ...

Tesla euphoria exists over there too:

https://cimg8.ibsrv.net/gimg/rennlist.com-vbulletin/720x520/teslainfoa_8b17e443584c9edc24d2ae18790603c9181f7e54.jpg
Forum: 964 Forum
03-02-2019, 04:25 PM
Replies: 79
Views: 20,439
Posted By Lorenfb

Remember, the units you have utilizes an analog...

Remember, the units you have utilizes an analog design, i.e. it has +/- 5/10% components. The later module is a digital design.
Forum: 964 Forum
03-02-2019, 03:30 PM
Replies: 79
Views: 20,439
Posted By Lorenfb

Remember, the speed signal just requires a basic...

Remember, the speed signal just requires a basic trigger pulse at some minimum pulse width with a varying frequency, i.e. there's no measurement of a duty cycle.
As long as your freq generator...
Forum: 993 Forum
02-22-2019, 11:32 PM
Replies: 41
Views: 3,136
Posted By Lorenfb

I should have stated that the reliability issue...

I should have stated that the reliability issue occurs because the chip needs to be removed to re-flash it, and then reliably re-soldered, i.e. it has 68 very tiny solder pins.
Given the mounting of...
Forum: 993 Forum
02-22-2019, 01:04 PM
Replies: 41
Views: 3,136
Posted By Lorenfb

It's just that some mods are inherently...

It's just that some mods are inherently unreliable.
02-22-2019, 12:11 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

TM-Spy app shows an 'Insane" mode MS run at full...

TM-Spy app shows an 'Insane" mode MS run at full power for about 4 seconds of around 375 kW at 1,300 Amps.
Note how the pack voltage sags around 100 volts under that load.
...
Forum: 993 Forum
02-22-2019, 11:44 AM
Replies: 41
Views: 3,136
Posted By Lorenfb

Thanks for the response. At least you're aware of...

Thanks for the response. At least you're aware of potential issues. FVD has had some problems with 996 DME ECM re-flashes where the DME ECM became intermittent.
Anytime chips are removed for...
02-21-2019, 04:00 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

Interesting Nissan Leaf Li-ion battery resistance...

Interesting Nissan Leaf Li-ion battery resistance data over time and temperature:

11/20 -13,700 miles, 76 mohms per LeafDD, 20 Deg, 73% SOC
11/27 -13,800 miles, 67 mohms per LeafDD, 25 deg, 63%...
02-21-2019, 02:05 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

If a BEV manufacturer's objective was to maximize...

If a BEV manufacturer's objective was to maximize the power efficiency of the vehicle's drive train beyond having tweaked the motor, using the fastest semiconductors with
the lowest Vsat in the...
02-21-2019, 12:33 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

Maybe take a basic electronics class.

Maybe take a basic electronics class.
Forum: 993 Forum
02-21-2019, 12:16 PM
Replies: 41
Views: 3,136
Posted By Lorenfb

You use a higher octane fuel now, right? If not,...

You use a higher octane fuel now, right? If not, you probably in some cases, e.g. high ambient temp, greater engine loads, have less HP than before. Remember, the 993 has knock sensors
which retard...
02-21-2019, 01:22 AM
Replies: 774
Views: 53,684
Posted By Lorenfb

Exactly! That's one of the reasons Tesla uses TMS...

Exactly! That's one of the reasons Tesla uses TMS (thermal mgmt system), i.e. to prevent excessive battery heat while charging. The Leaf with their 40 kWhr (~ 140 mile range)
model has to...
02-21-2019, 12:53 AM
Replies: 774
Views: 53,684
Posted By Lorenfb

You obviously missed the point being made in your...

You obviously missed the point being made in your video, that the 2170 can be charged at a higher rate that can the 18750. The guy states that! This is the point also being
made in the video I...
02-20-2019, 08:13 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

Instead of wasting 2 hrs watching a poorly...

Instead of wasting 2 hrs watching a poorly presented "2170 battery test", which basically only concluded that 2170 can charge at a higher rate than the 18650, read here;...
02-20-2019, 07:33 PM
Replies: 774
Views: 53,684
Posted By Lorenfb

Another perspective on the 18650 vs the 2170; ...

Another perspective on the 18650 vs the 2170;
https://www.youtube.com/watch?v=uJMG01wesTs
Forum: 993 Forum
02-20-2019, 01:58 PM
Replies: 41
Views: 3,136
Posted By Lorenfb

And the reality: ...

And the reality:
http://forums.rennlist.com/rennforums/911-forum/701786-performance-tuning-the-myth.html
Showing results 1 to 25 of 479
 


 
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