06-25-2014, 07:48 PM | #687 | |
Member
Join Date: May 2014
Drives: 2010 MX-5
Location: SoCal
Posts: 93
Thanks: 24
Thanked 13 Times in 11 Posts
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
|
Quote:
I would recommend running the system in open loop (pretty much like Phantom), see what range of boost you are working with, and then try to may be optimize it in a closed loop. Your thoughts ? Any news from the tuning front? I would say Shiv's tuning tables from the Phantom setup could be a good starting point. Last edited by AN; 06-25-2014 at 08:46 PM. |
|
06-25-2014, 08:49 PM | #688 | |
Senior Member
Join Date: Jun 2012
Drives: DGM BRZ limited
Location: Indiana
Posts: 366
Thanks: 98
Thanked 145 Times in 95 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
|
Quote:
|
|
06-25-2014, 09:45 PM | #689 | |
Senior Member
Join Date: Jan 2012
Drives: '13 GBS Subaru BRZ
Location: Minneapolis, MN
Posts: 2,030
Thanks: 680
Thanked 664 Times in 382 Posts
Mentioned: 26 Post(s)
Tagged: 1 Thread(s)
|
Quote:
For some reason the ESC doesn't like the signal from the Unichip. One thing I noticed when controlling the ESC with the servo tester is that it sometimes but not always seems to have a boot up delay with a beep the first time I speed it up after its powered on.
__________________
-Fortes fortuna adiuvat (Fortune favors the bold)
|
|
06-25-2014, 10:29 PM | #690 | |
Senior Member
Join Date: Jun 2012
Drives: DGM BRZ limited
Location: Indiana
Posts: 366
Thanks: 98
Thanked 145 Times in 95 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
|
Quote:
|
|
The Following User Says Thank You to rusty959 For This Useful Post: | neutron256 (06-25-2014) |
06-25-2014, 10:52 PM | #691 | |
Senior Member
Join Date: Jan 2012
Drives: '13 GBS Subaru BRZ
Location: Minneapolis, MN
Posts: 2,030
Thanks: 680
Thanked 664 Times in 382 Posts
Mentioned: 26 Post(s)
Tagged: 1 Thread(s)
|
Quote:
__________________
-Fortes fortuna adiuvat (Fortune favors the bold)
|
|
06-26-2014, 11:09 AM | #692 |
Senior Member
Join Date: Jan 2012
Drives: '13 GBS Subaru BRZ
Location: Minneapolis, MN
Posts: 2,030
Thanks: 680
Thanked 664 Times in 382 Posts
Mentioned: 26 Post(s)
Tagged: 1 Thread(s)
|
Okay so good news is my Unichip control system seems to be working perfectly as is the Fatboy V2 ESC. The problem is that the AquaStar T20 motor seems to have developed an intermittent problem with one of its connectors. It's a neat motor, but I have no love for it's complex wiring setup.
So now I need a new motor, I already had one on order, but it's coming from china so it won't be here for a week or so. SkyRC Beast X513 3Y http://www.skyrc.com/index.php?route...product_id=145 It's less powerful, but I wanted to see how it will work. Assuming it's not powerful enough I'm going to need a heftier motor. TP Power is looking like a great candidate. Thanks @AN
__________________
-Fortes fortuna adiuvat (Fortune favors the bold)
|
The Following User Says Thank You to neutron256 For This Useful Post: | AN (06-26-2014) |
06-26-2014, 11:26 AM | #693 |
Senior Member
Join Date: Jan 2012
Drives: '13 GBS Subaru BRZ
Location: Minneapolis, MN
Posts: 2,030
Thanks: 680
Thanked 664 Times in 382 Posts
Mentioned: 26 Post(s)
Tagged: 1 Thread(s)
|
Here is my favored motor so far for my 24V system. It's 1440kv 3850W continuous output, and it has the needed 8mm shaft. At a peak voltage that would give 41K RPM.
TP Power: TP 4070 3Y http://www.tppowerusa.com/motors/in-...ame&order=DESC
__________________
-Fortes fortuna adiuvat (Fortune favors the bold)
|
06-26-2014, 12:35 PM | #694 | |
Member
Join Date: May 2014
Drives: 2010 MX-5
Location: SoCal
Posts: 93
Thanks: 24
Thanked 13 Times in 11 Posts
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
|
Quote:
My recommendation would be the 5650 -6D 1800 KV motor. Its a 56mm Motor, more tq, 4200W Continuous power, 50k rpm max rpm. This motor should rev up to 43k rpm on a 24v pack easily. You are not pushing it too much as far as peak V goes. And remember, this motor will only need more current if it sees more load. So in your setup, it should have no problem giving max possible boost low down the engine rpm. As Engine revs higher, the motor will need more current to keep the boost up. I guess you will reach the battery current capacity at high engine rpm. Then you can start looking at integrating your BoostCaps . btw, its a build your own motor so I suspect some build time on it. They might even work with you on the kind of shaft you need for this. |
|
The Following User Says Thank You to AN For This Useful Post: | neutron256 (06-26-2014) |
06-26-2014, 08:04 PM | #695 | |
Senior Member
Join Date: Jun 2012
Drives: DGM BRZ limited
Location: Indiana
Posts: 366
Thanks: 98
Thanked 145 Times in 95 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Fair enough. Probably the only other big thing I can think of is I know one of my ESC's required the throttle to be at 0% for a certain amount of time before it would enable. |
|
06-27-2014, 01:29 PM | #696 |
Member
Join Date: May 2014
Drives: 2010 MX-5
Location: SoCal
Posts: 93
Thanks: 24
Thanked 13 Times in 11 Posts
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
|
Okay ... Friday is a slow day at work ... so I started spending more time with Airflow calculations. If you are able to spin the Seadoo 215 compressor at 43k RPM, you can move 20 lb/s of air. (assuming at sea level). 20 lb/s should give you a pretty healthy boost. Per my calculations, as much as 12 psi @ 4500 rpm (not likely due to compressor surge line), tapering off to just under 3psi @ 7500 rpm. matrix below.
This sounds really good, may be too good to be true. In my opinion, limiting factor here would be: Battery Current available for the TP Motor. Compressor Surge line at lower engine rpms. BTW @ Neutron256, If you are getting the TP Motor and haven't yet ordered it, I would recommend the 5840S-6D (Link) over 5650-6D. They both have exactly same specs (Power, Peak V, Peak I, Max RPM, KV). However, the 5840S seams to have heat dissipation grooves etc. |
06-27-2014, 01:36 PM | #697 | |
Senior Member
Join Date: Jan 2012
Drives: '13 GBS Subaru BRZ
Location: Minneapolis, MN
Posts: 2,030
Thanks: 680
Thanked 664 Times in 382 Posts
Mentioned: 26 Post(s)
Tagged: 1 Thread(s)
|
Quote:
The new motor should be here Monday. It looks like they use a 6 hole mounting pattern so I will have to adapt the compressor which is currently setup for a 4 hole mount.
__________________
-Fortes fortuna adiuvat (Fortune favors the bold)
|
|
06-27-2014, 01:52 PM | #698 | |
Member
Join Date: May 2014
Drives: 2010 MX-5
Location: SoCal
Posts: 93
Thanks: 24
Thanked 13 Times in 11 Posts
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
|
Quote:
|
|
06-27-2014, 01:59 PM | #699 |
Member
Join Date: May 2014
Drives: 2010 MX-5
Location: SoCal
Posts: 93
Thanks: 24
Thanked 13 Times in 11 Posts
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
|
@neutron256 Also, about the Seadoo SC, that wheel looks really heavy, the blades are really thick (did you notice that too) ... I tried to do some reading online and concluded that since water-crafts hop over waves while in full throttle, their engines go thru very extreme rpm fluctuations ... impellers are not able to keep up with such fluctuations. As a result, they had to introduce a clutch assembly to the supercharger drive so that the impeller can 'slip' during such fluctuations. For the impeller to maintain its rpm during fluctuations, they had to give it more weight/momentum so that it can 'slip' well.
Do you see this helping/hurting this application ? Does a heavy impeller translate into a less responsive engagement. Also, a heavy impeller means bigger current draw while the impeller accelerates to its peak rpm. Your thoughts ? |
06-27-2014, 02:08 PM | #700 | |
Senior Member
Join Date: Jan 2012
Drives: '13 GBS Subaru BRZ
Location: Minneapolis, MN
Posts: 2,030
Thanks: 680
Thanked 664 Times in 382 Posts
Mentioned: 26 Post(s)
Tagged: 1 Thread(s)
|
Quote:
This can also be addressed with a programmable ESC that supports soft starts and breaking, as well as governing which works to maintains constant speed under shifting loads. The Fatboy V2 ESC I'm using has all these features.
__________________
-Fortes fortuna adiuvat (Fortune favors the bold)
|
|
|
|
Tags |
hairdyerperformance, only pulls hard one gear |
Thread Tools | Search this Thread |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Full throttle Electric Supercharger Build Thread | fenton | Forced Induction | 11295 | 02-19-2024 03:42 PM |
DUP THREAD MODZ PLZ DELETE KTHX | SloS14 | Forced Induction | 0 | 07-09-2013 05:41 PM |
Electric Turbocharger | Shankenstein | Forced Induction | 91 | 06-24-2013 02:47 PM |
Electric 86 | frosty86 | Scion FR-S / Toyota 86 GT86 General Forum | 8 | 11-10-2012 02:16 PM |
WRX Electric turbo | Neilus | Engine, Exhaust, Transmission | 42 | 05-03-2012 09:20 PM |