|
02-25-2014, 03:22 AM | #1 |
Drives: Toyota Echo Join Date: Feb 2014
Location: Australia
Posts: 23
|
Return fuel line.
Any one running a return fuel line with an aftermarket fuel rail and fuel pressure reg or is it not important... Would love to hear every ones opinions. TIA
|
02-25-2014, 08:35 AM | #2 |
Embracing Curves
Drives: '14 Prius Executive Join Date: Aug 2013
Location: mid-western Germany
Posts: 256
|
As the fuel is scarcely compressible, I see no advantage in moving the pressure regulation circuit from the tank to the engine.
|
02-25-2014, 08:49 AM | #3 |
Drives: Toyota Echo Join Date: Feb 2014
Location: Australia
Posts: 23
|
Thanks for your reply. I'm more concerned about whether or not a return fuel line is necessary. If I don't have one will there be to much pressure in the fuel rail?
|
02-25-2014, 08:52 AM | #4 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
|
When upgrading the fuel system for forced induction systems, a return fuel system upgrade allows you to install a 1:1 fuel pressure regulator. That allows you to have the fuel pressure increase by 1 PSI for 1 PSI of boost (to compensate for the plenum pressure).
For my supercharged Yaris, I modified a stock pressure regulator to increase the fuel system pressure to 6 PSI (which is the max boost for the S/C). I also increased one to 60 PSI for fnkngrv for his turbo setup.
__________________
|
02-25-2014, 09:36 AM | #5 |
Drives: Toyota Echo Join Date: Feb 2014
Location: Australia
Posts: 23
|
Thanks mate
|
02-25-2014, 02:12 PM | #6 |
Mr. 155 and climbing
Drives: Seriously Modded 07 Sedan Join Date: Jun 2006
Location: In The Hotbox
Posts: 4,742
|
what is your goal here?
__________________
Team Tiamat Racing on Facebook Youtube Channel: Team Tiamat Racing Class record holder in Land Speed @ 154.5mph for 1.5 mile and 145.5mph in the mile in the F (2.016 to 3.014 L), G (1.524 to 2.015 L), and H (1.016 to 1.523 L) classes. |
02-25-2014, 06:41 PM | #7 |
Drives: Toyota Echo Join Date: Feb 2014
Location: Australia
Posts: 23
|
My goal is to find out how necessary a return fuel line is for turbo application on a 1nz-fe..
|
02-25-2014, 08:25 PM | #8 | |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
|
Quote:
So, the question is how much boost are you intending? If you are going to stay in the 8 psi range, then you don't need to upgrade the fuse pump, but if you are going to go above about 12psi, then you will start to run into the limits of the stock pump.
__________________
|
|
02-26-2014, 01:56 AM | #9 | |
Drives: Toyota Echo Join Date: Feb 2014
Location: Australia
Posts: 23
|
Quote:
I'm in the process of pulling down the block, and forged pistons and rods will be installed, ideally looking at 12-15 PSI for a daily driver. |
|
04-28-2014, 08:21 PM | #10 |
Mr. 155 and climbing
Drives: Seriously Modded 07 Sedan Join Date: Jun 2006
Location: In The Hotbox
Posts: 4,742
|
Having a return style system will be crucial at that level of boost. Scott, GSD, and I determined that even with a modified stock pump the single line system will begin seeing issues at even just 9psi. This is with 1zz (240cc) injectors. You could do the lazy route and go with tC injectors (335cc) or the likes, but you will essentially being running pretty inefficient which will net you other problems or nowhere close to the potential you should see.
__________________
Team Tiamat Racing on Facebook Youtube Channel: Team Tiamat Racing Class record holder in Land Speed @ 154.5mph for 1.5 mile and 145.5mph in the mile in the F (2.016 to 3.014 L), G (1.524 to 2.015 L), and H (1.016 to 1.523 L) classes. Last edited by fnkngrv; 04-28-2014 at 09:41 PM. |
04-28-2014, 09:37 PM | #11 | |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
|
Quote:
__________________
Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
|
04-28-2014, 09:40 PM | #12 |
Mr. 155 and climbing
Drives: Seriously Modded 07 Sedan Join Date: Jun 2006
Location: In The Hotbox
Posts: 4,742
|
__________________
Team Tiamat Racing on Facebook Youtube Channel: Team Tiamat Racing Class record holder in Land Speed @ 154.5mph for 1.5 mile and 145.5mph in the mile in the F (2.016 to 3.014 L), G (1.524 to 2.015 L), and H (1.016 to 1.523 L) classes. |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
DIY - Removing the gas tank from under the car (to access the fuel filter, etc.) | CTScott | DIY / Maintenance / Service | 1 | 08-21-2013 03:57 PM |
Yaris Fuel Pump | HTM Yaris | General Yaris / Vitz Discussion | 12 | 03-22-2012 03:34 AM |
The "let's brainstorm how to make a piggyback work" thread | eTiMaGo | Forced Induction Forum | 83 | 08-17-2011 03:54 PM |
Any body have good data on the Yaris fuel system? | LtNoogie | Performance Modifications | 9 | 03-26-2009 08:01 AM |
Low fuel light | falkor_99 | General Yaris / Vitz Discussion | 35 | 08-24-2007 03:20 PM |