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Powering Fuel Pump From Amp? *PIC ADDED*


JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 550096 posted 10/17/07 03:53 PM     Remind Me!  Send Private Message   Edit Post      
Hey would there be any drawbacks to powering the Fuel Pump rewire by using a distribution block from my amps...my power wire is too short to reach the front of the car and I already have a block in place...would there be less draw to the fuel pump or what? Thanks



-Jeremy
A88 Summit White - CD (No Sunroof)


Edited by JSchleim18 (05/14/08 11:34 AM)

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Terry Posten
Old Balls
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Galant VR-4 org Post #: 550097 posted 10/17/07 03:56 PM     Remind Me!  Send Private Message   Edit Post      
You need to provide us with:

Gauge and length of wire
Fuse size at battery
Amp size and draw



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grocery_getter
Senior Crab
836/2000


Galant VR-4 org Post #: 550099 posted 10/17/07 04:00 PM     Remind Me!  Send Private Message   Edit Post      
Make sure you have enough AMP reserve in the wire leading to the distribution block and that it is sized and fused properly so when the bass hit and your amp draw extra current, your fuel pump wont be starved of current.



Andre
836/2000
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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 550102 posted 10/17/07 04:02 PM     Remind Me!  Send Private Message   Edit Post      
Gauge & Length - 10AWG & would be approx. a foot and a half from relay to block
Fuse Size - 25 amp
Amp Size - 300W & 150W JL Audio



-Jeremy
A88 Summit White - CD (No Sunroof)

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Polish
Dr. Pilosh Haagenscodyberger


Galant VR-4 org Post #: 550106 posted 10/17/07 04:03 PM     Remind Me!  Send Private Message   Edit Post      
What is going from the battery to the block? If only 10 gauge then no dice. For those 2 amps and the fuel pump I'd do a 4 gauge main feed. Then 8 or 10 gauge from the block to the amps/pump. The main fuse will need to be 60-80 amps.



My car site
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Terry Posten
Old Balls
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Galant VR-4 org Post #: 550108 posted 10/17/07 04:04 PM     Remind Me!  Send Private Message   Edit Post      
How long is the feed wire from the battery to the power block?



1992 Galant VR4 click
2010 Outlander GT S-AWC Premium w/nav (wife daily)
2010 Jaguar XF Premium Luxury (my daily

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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 550113 posted 10/17/07 04:08 PM     Remind Me!  Send Private Message   Edit Post      
OK here we go...from the battery i have: 250 amp big ass fuse with 4 Gauge High Current Power wire all the way to the dist. block and then off the block i have 8 Gauge Wire going to the amps



-Jeremy
A88 Summit White - CD (No Sunroof)

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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 550115 posted 10/17/07 04:10 PM     Remind Me!  Send Private Message   Edit Post      
Quote:

How long is the feed wire from the battery to the power block?




I can't tell exactly how many feet but maybe 10-11...the battery was relocated to the intake and the dist. block is screwed to the back seats below the little opening (this is looking at it from the trunk)...the power wire runs on the driver side



-Jeremy
A88 Summit White - CD (No Sunroof)

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grocery_getter
Senior Crab
836/2000


Galant VR-4 org Post #: 550116 posted 10/17/07 04:10 PM     Remind Me!  Send Private Message   Edit Post      
What we are all worrying about is if you have enough of a wire size and fuse on the wire leading to the distribution block. That last 1.5 foot from the distribution block to the fuel pump isn't going to be as critical as the main supply to the distribution block with 450W worth of amp already on it.



Andre
836/2000
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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 550119 posted 10/17/07 04:10 PM     Remind Me!  Send Private Message   Edit Post      
OK sorry about that...i think i clarified everything else up in the last 2 posts



-Jeremy
A88 Summit White - CD (No Sunroof)

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Polish
Dr. Pilosh Haagenscodyberger


Galant VR-4 org Post #: 550122 posted 10/17/07 04:13 PM     Remind Me!  Send Private Message   Edit Post      
Ok, you are fine then. 4g is good.



My car site
Old GVR4 #1186/2000

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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 550123 posted 10/17/07 04:13 PM     Remind Me!  Send Private Message   Edit Post      
aight thanks for the help...so i should have ZERO worries letting her go through the dist. block! Great!



-Jeremy
A88 Summit White - CD (No Sunroof)

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Terry Posten
Old Balls
425/1000


Galant VR-4 org Post #: 550130 posted 10/17/07 04:24 PM     Remind Me!  Send Private Message   Edit Post      
Run a 10GA wire from the pump housing plate to a frame point (clean all gounding points and then protect). Just because you have 10GA for power does not mean that the pump is gounded good enough stock.



1992 Galant VR4 click
2010 Outlander GT S-AWC Premium w/nav (wife daily)
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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 550164 posted 10/17/07 05:30 PM     Remind Me!  Send Private Message   Edit Post      
no the ground is 10GA IIRC...i ran it from the relay and did everything as per VFAQ



-Jeremy
A88 Summit White - CD (No Sunroof)

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Qship
Unregistered


Galant VR-4 org Post #: 550193 posted 10/17/07 06:31 PM     Remind Me!  Send Private Message   Edit Post      
Yes but that's the relay ground; it's not connected to the fuel pump. He's talking about grounding the fuel pump as well, so you're upgrading both the hot and cold sides (relative to the pump) of the circuit for optimal flow. Which is a good idea btw; I'm going to go ground my fuel pump this afternoon. Thanks for the tip.

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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 550201 posted 10/17/07 06:44 PM     Remind Me!  Send Private Message   Edit Post      
Ohh aight I got you now!...I shall do that tomorrow...Thanks



-Jeremy
A88 Summit White - CD (No Sunroof)

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iceman69510 Galant VR4.org Moderator
Turn Right Racing
855/2000


Galant VR-4 org Post #: 550254 posted 10/17/07 08:42 PM     Remind Me!  Send Private Message   Edit Post      
I had a grounding issue following my rewire, new fuel pump and reconnecting a wire that broke off the fuel pump housing. I added a second ground to make sure it was good and stable. Good advice to make sure the ground is good, because otherwise it can shut down the fuel system.



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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 644805 posted 05/10/08 09:29 PM     Remind Me!  Send Private Message   Edit Post      
Quoting Terry Posten:

Run a 10GA wire from the pump housing plate to a frame point (clean all gounding points and then protect). Just because you have 10GA for power does not mean that the pump is gounded good enough stock.




Bringing this thread back up...would I be able to get away with grounding this wire from the housing plate to the bolt that the rear bumper bolts to (that big ass bolt coupled with another one for the bumper support)??? Thanks



-Jeremy
A88 Summit White - CD (No Sunroof)

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curtis Galant VR4.org Moderator
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Galant VR-4 org Post #: 644812 posted 05/10/08 10:31 PM     Remind Me!  Send Private Message   Edit Post      
I'll also add its always good when moving the battery to the trunk to run a separate ground all the way to the front into a distribution block. I've seen cars do some werid stuff without it. Also it doesn't hurt to run a larger cable from the alternator over to the fuse block. I actually have two on mine. One is the factory one and the other is just a stock wire from a suzuki grand vitara or something. The whole harness was laying behind my buddies shop so it was free. Its a little larger gauge than the stock vr4 one.


Reason for all this. Why run a 2 gauge positive cable from the battery in the trunk to the front of the car when its only being feed from a wire a 1/4 of the size and is 16 years old.



92 GVR4 0475/1000
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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 645907 posted 05/14/08 11:35 AM     Remind Me!  Send Private Message   Edit Post      
Here's a pic for reference:



Would this be a good ground point for the fuel pump rewire?

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Wizardawd
Senior Member
598/1000


Galant VR-4 org Post #: 645933 posted 05/14/08 12:36 PM     Remind Me!  Send Private Message   Edit Post      
The bolt holding the rear bumper support yes. On the pump, no.

Make sure that you get as much of a paintless, large surface contact point as possilbe. And since the bumper support bolts are fairly beefy, you'll be able to attach a fairly large connector to it as well. Star washers do wonders as well.

Wiz



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JSchleim18
Minor 69er
1157/2000


Galant VR-4 org Post #: 645936 posted 05/14/08 12:44 PM     Remind Me!  Send Private Message   Edit Post      
OK So the bumper support part is a definite...now where would I attatch the other end to actually ground the fuel pump rewire? Do I need to take the fuel pump sending unit back out?

EDIT - It looks like I just need to run the 10G wire from the fuel pump itself to the ground point on the bumper support...Thanks!



-Jeremy
A88 Summit White - CD (No Sunroof)


Edited by JSchleim18 (05/14/08 12:51 PM)

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marvinmadman
Senior Member
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Galant VR-4 org Post #: 646093 posted 05/14/08 09:47 PM     Remind Me!  Send Private Message   Edit Post   
I had some issues once with my capacitor grounded there. I had to move it to the shock tower. The area was cleaned and everything...



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