User Tag List
Thanks: 0
Results 1 to 13 of 13
Thread: Laser EFI fuel system question
-
06-19-2018, 06:12 PM #1
Laser EFI fuel system question
Re-rigging a 2.4 XRI (laser injection). Was going to remove vst tank and fuel pump just to tidy things up a bit, already have a Weldon pump and filter to use in boat. Plan was to plumb from tank to pump to fuel rail, then to adjustable regulator and back to tank. I have been educated that the factory pump and vst system is capable of maintaining a consistent fuel pressure due to a vacuum referenced regulator. Has anyone done a similar swap successfully? How did it work out? What regulator did you use? Any other concerns with going this route?
-
gmacrae liked this post
-
06-19-2018, 08:09 PM #2
Aero motive efi regulator with vacumm reference
-
06-20-2018, 04:21 AM #3
Also would like to know this...Is the stock regulator 1:1 vacuum reference? ie. for every 1psi more intake pressure, the fuel pressure also increases 1psi ..?
-
06-20-2018, 04:22 AM #4
...and curious to know what you'll do with the bleed system that feeds back into the VST - will you just block them all off? ...sorry to threadjack!
-
06-20-2018, 08:25 PM #5
This regulator kit should be perfect, mine is similar but a little higher end and this one comes with some gauges etc
run from tank to pump, pump to injector rail, injector rail to regulator. Regulator to tank
yank all the vst junk. If changing. You could feed the pump and return to the vst instead of from the tank but will be much simpler and easier to just pull it all and feed/return to tank
-
06-20-2018, 08:49 PM #6
I had a few answers on Facebook as well, looked up a Bosch gold regulator with vacuum reference. $190 and not available in Canada (through Napa anyways). I have looked at a Holley adjustable with vacuum reference locally, so I'm now wondering if 39 psi is max at wot or if it should be set at 39 psi and allow vacuum port to take it from there?
-
06-20-2018, 10:41 PM #7
http://www.tomeiusa.com/_2003web-cat...regulator.html
That's the regulator I bought, intended to use with the stock VST and fuel pump still in place but haven't set it up yet. It's 1:1 and should flow plenty.
-
06-20-2018, 10:56 PM #8
The purpose of the VST is to allow the motor to be rigged with a single fuel hose from the boat with a primer bulb. If you’re going to re-engineer the system I would make it as simple as possible like 90 5.0 recommended. If you keep the VST you’re just adding complexity to something that could and should be simple and fairly bulletproof!
Josh Peterson
-
06-20-2018, 11:19 PM #9
Forgot to post the links
https://www.jegs.com/i/Aeromotive/027/13130/10002/-1
or a cheaper alternative I would chose the first one.
https://www.jegs.com/i/Aeromotive/027/13130/10002/-1
i am using this one now, it allows me to just change an internal spring to switch between efi and carb setup without changing pumps and regulators easily.
-
06-21-2018, 05:43 AM #10
-
06-21-2018, 05:45 AM #11
-
06-21-2018, 08:52 AM #12
-
06-23-2018, 12:15 PM #136000 RPM
- Join Date
- Dec 2011
- Location
- Ottawa
- Posts
- 1,365
- Thanks (Given)
- 33
- Thanks (Received)
- 47
- Likes (Given)
- 20
- Likes (Received)
- 72
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
Similar Threads
-
Detailed instructions on moving fuel system on 220 laser
By brade07 in forum Technical DiscussionReplies: 29Last Post: 03-30-2021, 07:21 PM -
Laser fuel injection. No computer for sale or trade. 40 amp charging and wirin system
By wired247 in forum Misc. Parts and AccessoriesReplies: 7Last Post: 11-11-2013, 04:52 PM -
Fuel system question
By FluidGrooves in forum Technical DiscussionReplies: 3Last Post: 05-21-2003, 10:43 AM -
another fuel system question.....
By Banana Boat in forum Technical DiscussionReplies: 1Last Post: 05-08-2003, 09:54 PM