Fuel pump re-wire/hotwire - who has done it? - 3000GT/Stealth International Message Center
3000GT/Stealth International 3000GT/Stealth International
 

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   3000GT/Stealth International Message Center > Modifications and Technical Support > Engine - Turbo

3SI.org is the premier Mitsubishi 3000GT Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 07-18-2010, 07:19 PM   #1 (permalink)
Twin Turbo
 
GTOJOE's Avatar
 
Join Date: May 2008
Location: Melbourne, Australia
Drives: 1990 GTO TT
GTOJOE is an unknown quantity at this point
Feedback Score: 6 reviews
Question Fuel pump re-wire/hotwire - who has done it?

Has anyone done this? Has anyone else had the same issues Jeff had with unstable fuel pressure? I am using the stock pump while he was using the Supra pump. However at some stage I plan on fitting a Walbro pump instead.

Stealth 316 - Fuel Pump Re-Wire

Or should I be following this one instead?

RDR 3000GT/Stealth Fuel Pump Rewiring

Cheers,

Joe
__________________
1990 JDM GTO TT with Vi-PEC plug-in V44 EMS, TD04-13T's, 3SX Downpipe, MP Hi-flow cat, ARC SMIC's, Aeromotive Stealth 340LPH pump, Fuelab 515 FPR, Ninja Performance 75amp hotwire kit, oohnoo fuel loop & rail adapters, Nylon braided ethanol fuel line, NGK AFX Wideband, K&N FIPK, Iridium plugs, Turbo XS racing BOV, 3SX poly mounts, Custom 280km/h speedo.

Waiting install
Injector Dynamics 725cc, HKS Twin Spark DLI.

Helpful stuff
How to convert a JDM 180km/h speedo to 280km/h

Understanding MAF part numbers and compatibility
GTOJOE is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 07-18-2010, 07:33 PM   #2 (permalink)
Verified Seller
 
soccermania688's Avatar
 
Join Date: Sep 2007
Location: Long Island, NY
Drives: Mitsubishis
soccermania688 is an unknown quantity at this point
Feedback Score: 9 reviews
Default Re: Fuel pump re-wire/hotwire - who has done it?

What i did was run a 10 awg wire from the battery to the pump. using a regular 30a automotive you use the stock fuel pump power wire as your relay trigger. you also need to do the resistor by-pass. The stock wires are very small and go a long distance so there really isn't enough power getting to the pump under stock wiring. I can't feel the transition from low speed to high speed anymore and its a lot smoother.

If you ever upgrade your pump you might over run your stock fpr and then all you would need is an aftermarket fpr. I don't think a walbro would overrun the stock fpr if its still in good conditon
__________________
2007 BMW 335i 6MT BLK/BLK 1995 3000GT VR4 l SOLD l

1992 3000GT VR4 - SOLD

Last edited by soccermania688; 07-18-2010 at 07:44 PM.
soccermania688 is offline   Reply With Quote Quick reply to this message
Old 07-18-2010, 08:17 PM   #3 (permalink)
Twin Turbo
 
GTOJOE's Avatar
 
Join Date: May 2008
Location: Melbourne, Australia
Drives: 1990 GTO TT
GTOJOE is an unknown quantity at this point
Feedback Score: 6 reviews
Default Re: Fuel pump re-wire/hotwire - who has done it?

Have you noticed any issues with fuel pressure? Should I be also fitting an aftermarket FPR?
GTOJOE is offline   Reply With Quote Quick reply to this message
Old 07-18-2010, 09:03 PM   #4 (permalink)
Verified Seller
 
soccermania688's Avatar
 
Join Date: Sep 2007
Location: Long Island, NY
Drives: Mitsubishis
soccermania688 is an unknown quantity at this point
Feedback Score: 9 reviews
Default Re: Fuel pump re-wire/hotwire - who has done it?

Quote:
Originally Posted by GTOJOE View Post
Have you noticed any issues with fuel pressure? Should I be also fitting an aftermarket FPR?
Its not necessary with the stock pump. Fuel pressure seems fine but I don't have a gauge on it.
soccermania688 is offline   Reply With Quote Quick reply to this message
Old 07-18-2010, 09:15 PM   #5 (permalink)
Slow Learner
 
x2xtreme360's Avatar
 
Join Date: Mar 2007
Location: Cazenovia, NY
Drives: Like a German
x2xtreme360 Level 1x2xtreme360 Level 1x2xtreme360 Level 1
Feedback Score: 17 reviews
Default Re: Fuel pump re-wire/hotwire - who has done it?

I just did this yesterday... so it's funny to me that this thread pops up

My fuel pressure has been high for awhile. I already had the resistor bypass mod done. Here are my before and after numbers.

BEFORE:
11.23V Cold idle
10.76V Under boost
11.07V Hot idle

AFTER:
13.91V Cold idle
13.96V Under boost
13.95V Hot idle

Battery voltage: 14.09V

Obviously, the mod kept the fuel pump voltage very stable. Before it was done, voltage would DROP when it was needed most... under boost.

I ran 10AWG from the battery back to the pump. I thought about using 8AWG but went with 10 because Hosfelt didn't have 8AWG and they were VERY cheap. My install is VERY clean and I am quite satisfied with the results.

Fuel pressure is even higher now at around 50psi. Coming up next for me is an AFPR. On the plus side, my injectors flow more at 50psi... so I might even be able to go higer than 14psi of boost.

BTW, the Erik Gross method isn't the way to go... even he himself has stated high fuel pressure after doing it his way.
__________________

Vacuum reduction, Powdercoated misc, cruise relocate, Evo9 BOV, Custom catch cans, Russell fuel filter, SS braided fuel lines, High flow fuel loop, Autogage fuel gauge, Catless DP, DNP Y-pipe, Fuel pump hotwire.

FS/FT: 94 3000GT base $3k
x2xtreme360 is offline   Reply With Quote Quick reply to this message
Old 07-18-2010, 09:22 PM   #6 (permalink)
Twin Turbo
 
GTOJOE's Avatar
 
Join Date: May 2008
Location: Melbourne, Australia
Drives: 1990 GTO TT
GTOJOE is an unknown quantity at this point
Feedback Score: 6 reviews
Default Re: Fuel pump re-wire/hotwire - who has done it?

Thanks for the update. I will be using 8 guage wire. My main concern was the high FP. But if it doesn't cause issues I'll go ahead with it.

Cheers,

Joe
GTOJOE is offline   Reply With Quote Quick reply to this message
Old 07-18-2010, 09:25 PM   #7 (permalink)
Forum Member
 
Ferriolom's Avatar
 
Join Date: Mar 2009
Location: Herkimer, NY
Drives: 1991 Stealth R/T TT
Ferriolom is an unknown quantity at this point
Feedback Score: 3 reviews
Default Re: Fuel pump re-wire/hotwire - who has done it?

I did the rewire in may with a 40amp relay. I have sufficent amps to the fuel pump.
Running a 255 without an FPR (I need one like Xtreme does)
kwikwire.com sells a kit for this for like $25 if you don't want to do it custom tho..
Ferriolom is offline   Reply With Quote Quick reply to this message
Old 07-18-2010, 09:26 PM   #8 (permalink)
Slow Learner
 
x2xtreme360's Avatar
 
Join Date: Mar 2007
Location: Cazenovia, NY
Drives: Like a German
x2xtreme360 Level 1x2xtreme360 Level 1x2xtreme360 Level 1
Feedback Score: 17 reviews
Default Re: Fuel pump re-wire/hotwire - who has done it?

Quote:
Originally Posted by GTOJOE View Post
Thanks for the update. I will be using 8 guage wire. My main concern was the high FP. But if it doesn't cause issues I'll go ahead with it.

Cheers,

Joe
You will probably have higher fuel pressure... as I said, mine is at 50psi right now when it should be at ~38psi at idle.
x2xtreme360 is offline   Reply With Quote Quick reply to this message
Old 07-18-2010, 09:28 PM   #9 (permalink)
Forum Member
 
Ferriolom's Avatar
 
Join Date: Mar 2009
Location: Herkimer, NY
Drives: 1991 Stealth R/T TT
Ferriolom is an unknown quantity at this point
Feedback Score: 3 reviews
Default Re: Fuel pump re-wire/hotwire - who has done it?

Depends. I don't think you will overrun the stock FPR with a rewired stock pump will you? With a 255 you NEED an AFPR though...
Ferriolom is offline   Reply With Quote Quick reply to this message
Old 07-18-2010, 09:39 PM   #10 (permalink)
Twin Turbo
 
GTOJOE's Avatar
 
Join Date: May 2008
Location: Melbourne, Australia
Drives: 1990 GTO TT
GTOJOE is an unknown quantity at this point
Feedback Score: 6 reviews
Default Re: Fuel pump re-wire/hotwire - who has done it?

I'm running stock boost [with free boost mod] atm and don't intend on increasing it until I have a Walbro 255. In this case I would fit an aftermarket FPR at the same time. Depending on finances I might fit the FPR sooner rather than later.
GTOJOE is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  3000GT/Stealth International Message Center > Modifications and Technical Support > Engine - Turbo

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the 3000GT/Stealth International Message Center forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Free email addresses do not work(yahoo, hotmail, gmail,...)
We are currently being blocked by AOL so any AOL based address may not work(aol.com, aim.com, netscape.net, cs.com)
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 01:02 AM.




Garage Plus vBulletin Plugins by Drive Thru Online, Inc.

Search Engine Optimization by vBSEO 3.3.2