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01-05-2014, 02:23 PM | #26 | |
Scooby Newbie
Member#: 296048
Join Date: Sep 2011
Chapter/Region:
Tri-State
Location: Kenilworth, NJ
Vehicle:2011 STI Blurple |
Quote:
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01-05-2014, 02:44 PM | #27 |
Scooby Specialist
Member#: 176128
Join Date: Mar 2008
Chapter/Region:
South East
Location: I <3 E85
Vehicle:5862 ...baby boosted |
^when i spoke to the people at dccd they said that 16.5 A is a continuous rating. It could see flashes of much higher amperage as long as it comes back down.
so i guess it depends on how long you stay in boost and how much boost you end up running |
01-05-2014, 02:53 PM | #28 |
Scooby Newbie
Member#: 296048
Join Date: Sep 2011
Chapter/Region:
Tri-State
Location: Kenilworth, NJ
Vehicle:2011 STI Blurple |
They told me the same thing.However 10 seconds at full boost hardly qualifies as a spike
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01-05-2014, 04:26 PM | #29 |
Scooby Newbie
Member#: 283968
Join Date: May 2011
Chapter/Region:
MWSOC
Location: Fort Wayne, IN
Vehicle:2003 WRX MBP |
(I have designed some high current dc motor controllers that I've used in robotics)
continuous current rating is ASSUMING you can keep it in an acceptable temperature range, time to start designing a heat sink and blower setup... Also, once you throw PWM into the equation, yes you can run higher peak current, but keep in mind switching losses also contribute to heat this is why controllers are designed, and not just wiring one FET to a pump good luck |
01-06-2014, 01:25 PM | #30 | |
Scooby Guru
Member#: 51961
Join Date: Jan 2004
Chapter/Region:
RMIC
Location: Broomfield, CO
Vehicle:2005 STi 2012 WRX |
Quote:
Not exactly the most scientific research, but as a matter of reference just do a quick Google image search for "pwm motor driver" and look at the output stage of just about any of them. |
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01-06-2014, 02:27 PM | #31 |
Scooby Specialist
Member#: 172698
Join Date: Feb 2008
Chapter/Region:
MWSOC
Location: Des Moines, IA
Vehicle:11 STi BW 8374 E85 02 v8 Spec C E85 |
Don't have anything useful in regards to the wiring and control question, but I too am wondering why you want to use an electric jet pump.
Are you are hitting a limitation with the stock return line venturi jet pump? Are you trying to bypass this to return directly to the oem plastic sump housing? Or do you have some other motive for what you are trying to do? I'm very interested in why you want to do this. I've got a walbro 400 crammed into my oem sump housing and its all plumbed like stock currently. I'm using the FuelPro controller, wired into the OEM FPC harness but grounded directly do the chassis. I tried using the OEM ground but the FuelPro did not like this and they advised using a chassis ground which made it behave perfectly. I'm not having issues with overrunning even the stock FPR and I'm not dropping fuel pressure even up to 26 psi. I'm at about 84% IDC on 1400 cc injectors. Stock rails, lines & fpr. |
01-06-2014, 02:48 PM | #32 |
Scooby Newbie
Member#: 359175
Join Date: Jun 2013
Location: North Huntingdon PA
Vehicle:2010 Forester XT |
I am curious would a different Jet pump help?
http://www.rhdjapan.com/sard-jet-pum...preza-gdb.html |
01-06-2014, 02:52 PM | #33 | |
Scooby Specialist
Member#: 172698
Join Date: Feb 2008
Chapter/Region:
MWSOC
Location: Des Moines, IA
Vehicle:11 STi BW 8374 E85 02 v8 Spec C E85 |
Quote:
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01-06-2014, 03:06 PM | #34 |
Scooby Specialist
Member#: 37146
Join Date: May 2003
Chapter/Region:
MWSOC
Location: CA
Vehicle:2005 Legacy GT Stage tree fitty |
The PWM is actually on the common wire from the stock fuel pump control module. Plenty of LGT guys including me have hard wired a stock location fuel pump. I have a dedicated 10 AWG wire going from the battery to a relay, then to the pump. The relay stays constantly latched closed using the reference voltage from the ECU.
DW sells a decent relay kit ready to go, which is what I bought. I then had to add some wiring and do the solder work with heat shrink. What you end up with is speed control of the pump using the factory controllers but you have the higher current capacity and virtually no voltage drop. The one foot length of smaller wire to the pump directly can handle up to 20A and not drop much voltage at all. |
01-06-2014, 03:26 PM | #35 | |
Scooby Guru
Member#: 51961
Join Date: Jan 2004
Chapter/Region:
RMIC
Location: Broomfield, CO
Vehicle:2005 STi 2012 WRX |
Quote:
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01-07-2014, 10:01 PM | #36 | |
Scooby Newbie
Member#: 296048
Join Date: Sep 2011
Chapter/Region:
Tri-State
Location: Kenilworth, NJ
Vehicle:2011 STI Blurple |
Quote:
I am aware of the sard jet pump but being that I already own a dw65 why not use it? I don't have a build thread so here is a quick rundown. 2011 STI element tuning pro comp long block, stock location gtx35r, amr inlet, hyrda standalone, ID1300 injectors. Every killer b part aeromotive340 fuel pump and rails |
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01-07-2014, 10:16 PM | #37 |
Scooby Newbie
Member#: 81369
Join Date: Feb 2005
Location: Dickinson, ND
Vehicle:2007 STI Black |
we have been using igbt's (another type of transistor) for years in pwm VSD's for ac motors most of them make it 10 years or more no problem with carrier frequency of 2.2-3.0khz thats alot of switching.
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01-08-2014, 02:35 PM | #38 | |
Former Vendor
Member#: 227549
Join Date: Oct 2009
Location: Guelph, Ontario
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Quote:
Just wanted to let you all know that we have made improvements to our product and 17-18 Amps @ 13.5 volts is easily accommodated well over time periods you have mentioned above. Yes, as you have mentioned, heat transfer is one of the aspects and we have made improvement on that front too. Kind regards, -Jeff |
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01-20-2014, 11:15 AM | #39 |
Scooby Newbie
Member#: 296048
Join Date: Sep 2011
Chapter/Region:
Tri-State
Location: Kenilworth, NJ
Vehicle:2011 STI Blurple |
Thanks for the update. I'll be using your fpc
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01-20-2014, 11:19 AM | #40 | |
Scooby Specialist
Member#: 172698
Join Date: Feb 2008
Chapter/Region:
MWSOC
Location: Des Moines, IA
Vehicle:11 STi BW 8374 E85 02 v8 Spec C E85 |
Quote:
I keep melting the lids with my walbro 400. |
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08-08-2018, 04:17 PM | #41 |
Scooby Newbie
Member#: 385361
Join Date: Mar 2014
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Not to Necro, but...
Did anybody end up trying anything with an ssr or a few?
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08-12-2018, 12:05 AM | #42 |
Scooby Guru
Member#: 32669
Join Date: Feb 2003
Chapter/Region:
SCIC
Location: Woodland Hills
Vehicle:2007 2.34LR, EFR7670 LINK G4+ hybrid STi |
Just ordered a MOSFET output 60A DC SSR. I see members on the Link ECU forum that have used them successfully. Gonna give it a try myself. Got a quality SSR and heat sink for about $100. For the lowest voltage drop/internal resistance, use a MOSFET output SSR. Cheaper ones can have more than a 2V voltage drop. MOSFET is usually less than .4V.
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