Im about to upgrade my fuel pump and had a few questions. First which pump is better as an upgrade? The Walbro 255lph or the mk4 Denso 280lph? If i were to install the Mk4 pump, would I have to do the 12Volt upgrade as well like the Walbro?
Fuel Pump Question
- Thread starter 1988ma70supra
- Start date
mk4 is better but its like 3-4x the price. mk4 is drop in but rewiring 20+ year old wiring never hurts.
I had a discussion, looks like a year ago - http://www.supramania.com/forums/showthread.php?t=78225
with my considerations of pro and con.
I decided MKIV for reliability, no chance of Chinese Walbro,
and as jdub stated, it draws more amps and routes through the 15amp efi fuse
but as some documentation shows denso can draw up to 21amps.
take it for what it's worth.
with my considerations of pro and con.
I decided MKIV for reliability, no chance of Chinese Walbro,
and as jdub stated, it draws more amps and routes through the 15amp efi fuse
but as some documentation shows denso can draw up to 21amps.
take it for what it's worth.
Bosch is also an option. Do some research "search function" but most of the data here will yeild that the MKIV is the best quality.
^
X2 on the 12v rewire.
^
X2 on the 12v rewire.
I put in my Walbro About 4 years ago, before I even heard of the 12 volt mod, and I have had no problems yet.
To be clear; My research and decision to do 12v rewire because of amp draw is only concerning the MKIV pump.
I did not research the walbro in that respect.
I did not research the walbro in that respect.
With a rewire (10ga optimal) there is less resistance and more output. More strands = better current. This will guarantee sufficient power supply to factory pump or aftermarket. When Fuel Pressure and load is put on the pump it needs more power, and if your wire can't supply the needed power it burns up. On a note if that pump draws 15 amps WOT and that 22ga wire can't supply it consistently , you've got problems.
Checkout this site for reference. http://www.roadraceengineering.com/fuelpumpflowrates.htm
As you will notice a rewire on a stock pump can prove to be helpful too.
Checkout this site for reference. http://www.roadraceengineering.com/fuelpumpflowrates.htm
As you will notice a rewire on a stock pump can prove to be helpful too.
If you choose to go the Walbro route, make sure you find the sticky on the Fake Walbros out of china.
Here is the warning on Fuel Pumps.Net site (they are a true Walbro distributor)
http://www.fuel-pumps.net/walbro-forgeries.html
Here is the warning on Fuel Pumps.Net site (they are a true Walbro distributor)
http://www.fuel-pumps.net/walbro-forgeries.html
So whether i go Denso or Walbro I should still do the 12volt mod right?
Or are you guys talking about rewiring it all together?
Or are you guys talking about rewiring it all together?
