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MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection Have a CDFP fuel pump question? Do you want to add Nitrous or Water Injection to your Mazdaspeed 3/6 ? Please come on in!

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 Old 02-28-2019, 12:06 AM   #121
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Originally Posted by SilverDemon View Post
It has been a while since the last update. I have completed the install, and have driven about 100 miles and went wide open about 6 times with this. For a base line rich map in the AIC, this is one nice set up. I should have done this before ever installing the meth injection. Although water/meth has its place in a turbo application, this is a far superior fuel delivery system.

I installed the FPR behind the small battery box I fabbed a while back, the bracket it is bolted to is actually the stock mount for the OEM battery box. I only have a mechanical gauge to set base pressure right now, my next step is to install an actual in cabin pressure gauge so I can keep tabs on the fueling. I have a boost pressure switch installed on the pre-I/C side of the piping to pull in the fuel pump relay. I put it pre I/C because that pipe will see the boost before the intake manifold will, in turn activating the pump with enough time to pressurize the system. I also installed an LED in the dash on the output side of the relay just to let me keep tabs on the pump circuit. The boost switch is made by Design Flex, it is a very robust high quality switch with a 10 million cycle life, and it can be end user adjustable. It has a burst pressure of 300psi and can be set to engage from 1 - 25psi.

Fabbing up the bracket for the cell. I used the mount for the spare tire and built a battery box type clamping device to hold the cell in place. I used all 1/8" angle and lined it with a rubber gasket to keep everything isolated from vibrations.

Built a false floor and a simple wooden box around the exposed fuel cell. Not sure if I like this, I might end up forming up some aluminum sheet metal and then covering it with carpet, but it will do for now

Dropped the lines to bulk head fittings through the trunk floor, added a fuel filter. By using the bulk head fittings it keeps the lines tucked up close to the under body.

The filter breather on the vent line.

One thing I found out the hard way is the lines that run inside the hatch area has to be ran with Teflon core hose. I ran them first with standard Aeromotive -6, this will permeate the fumes from the fuel, not good when the car sits for a few hours. I have since swapped out the lines with the correct ones after these pics were taken.

For tuning right now, I pulled 3° of timing out of the ignition tables until I get the AFR's ironed out with the PI. I am also running pump gas in the cell right now until I make sure everything is right with the system. I am going to the speed shop this week to pick up some 112 octane and I will slowly bring the tuning back up to where it was with the 1100cc's of meth...LOL!!
Hey man, awesome write up. Do you mind sharing how you did the routing for the hose? I have mine setup like this.
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 Old 02-28-2019, 09:14 AM   #122
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Please don't quote pictures especially when you try to revive a 6 year old thread.
Mazda for life...or until i can afford something better...

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