Forced Induction motors that have died

jwick

It's recommended to do the fuel pump relay above 500whp regardless of fuel pump used.

__________________
'10 G37T 6MT Graphite/Graphite - BP - G37T Build

shadow85

What is the fuel pump relay?

Is that something like the CJM S1.SE fuel system?

jwick

Do your research. Every question you've asked is covered on this forum already. Use the search function.

__________________
'10 G37T 6MT Graphite/Graphite - BP - G37T Build

phunk

A fuel pump relay kit is a modification to upgrade the wiring to the fuel pump. Larger fuel pumps pull more current and the factory fuel pump wiring circuit will become a "restriction".

The relay/wiring upgrade is a standalone modification from the rest of the fuel system. Although the CJM Billet Top Hat really finishes off the relay/wiring upgrade because it uses larger terminals through the fuel tank flange. Using the stock top hat means that your wiring upgrade still has to bottle neck down to fit through the stock fuel pump wiring connector.

__________________

KN21283

So without the relay kit, would it cause low throttle voltage?

I'm having trouble with low voltage and trying to figure it out any *info would be appreciated.

phunk

it would be unrelated to the throttle. At least, I cannot imagine it having any adverse side effects on other systems in the vehicle. But I am no electrical engineer. Without the relay kit on an upgraded fuel pump, the fuel pump wiring will be overheating and could be preventing the fuel pump from operating at full system voltage, reducing its output.

I have run the stock wiring (in my personal car) with an Aero 340 and with a Walbro 400 and the wires get impressively hot. Surprising it never blew a fuse or melted a relay but there is no doubt that the pump is not operating at its peak like this. I did start melting the plastic around the terminals on the stock fuel pump hat.

__________________

jchammond

Your question about low throttle voltage Doesn't have anything to do with the explanation that Mr."Phunk" gave about upgrading the wiring to the fuel pump/pumps...It's about preventing a restriction in the wiring;that would keep plenty of juice to the pump/without overheating the circuit...(Look up OHM's LAW & Study).
Another thing you can research is a good (Wire Sizing Chart) to let you know the recommended size wires to be used in a circuit-pending amperage draw & length of wire in an automotive circuit.
I know this is just barely scratching the surface of electrical connection's,wiring,relay's,voltage,amperage,etc.. .& i apologize for getting off topic with the electrical conversation;as i know this is about (FI) engine's.
Also Voltage is used in different automotive circuit's,sensor's in different value's....not alway's battery voltage.
Good Explanation Mr."Phunk"

__________________
MazWorx built long block | FI-TT-100 Stage 2.75 | IPT built 7A/T

http://www.the370z.com/members-370z-...s-musings.html