PERRIN - 2008WRX: Fuel System

PERRINJeff · 10-21-2007, 08:18 PM

Click Here to return to the links page

Of course to support this cars potential power, we need fuel. I used our high flow fuel rails and modified fuel injectors. We have had great success with our simple and very effective way to increase the size of the injectors. The 2006 WRX+ injectors are top feed style that (in stock form) flow 540CC/min of fuel. Our PERRIN Performance modified injectors flow over 800cc/min. We have hear people assert that these injectors have a bad spray pattern, and cause poor fuel economy. This is just not the case. I have found that people who say this are people who have never used them.

With the intake manifold removed, and rails installed, it was time to install the fuel pump. I changed out the stock fuel pump for a good old Walbro fuel pump. I did not test it but I assume the OEM pump would probably not flow enough fuel to make anywhere near 400WHP. Should only take an hour, right?

In a prior post I mentioned that Subaru moved the tank under the rear sear. Take note that, before you install a fuel pump, make sure that you didn’t just fill up the night before. This is messy!

Ironically I have never done an install of a fuel pump on a legacy GT, but how hard could it be??

Tragedy,
Well this install would have worked out fine If I hadn’t broken off the nipple from the output fitting, while installing the o-ring adapter from the OEM pump. This was of course the only pump we had so we would be putting the OEM fuel pump to the test! Could it do 400WHP??

* Registered users of the site do not see these ads.

PERRINJeff · 10-21-2007, 08:19 PM

wRxbeater11 · 11-05-2007, 11:58 PM

Jesus looks like fun.

REDCHARGE · 03-20-2009, 11:47 PM

reminds me of my escort pump.....hehehehee 4 screw drivers is right .

10-21-2007, 08:18 PM	#1
PERRINJeff NASIOC Manufacturer Member#: 74110 Join Date: Nov 2004 Location: PERRIN Performance	PERRIN - 2008WRX: Fuel System Click Here to return to the links page Of course to support this cars potential power, we need fuel. I used our high flow fuel rails and modified fuel injectors. We have had great success with our simple and very effective way to increase the size of the injectors. The 2006 WRX+ injectors are top feed style that (in stock form) flow 540CC/min of fuel. Our PERRIN Performance modified injectors flow over 800cc/min. We have hear people assert that these injectors have a bad spray pattern, and cause poor fuel economy. This is just not the case. I have found that people who say this are people who have never used them. With the intake manifold removed, and rails installed, it was time to install the fuel pump. I changed out the stock fuel pump for a good old Walbro fuel pump. I did not test it but I assume the OEM pump would probably not flow enough fuel to make anywhere near 400WHP. Should only take an hour, right? In a prior post I mentioned that Subaru moved the tank under the rear sear. Take note that, before you install a fuel pump, make sure that you didn’t just fill up the night before. This is messy! Ironically I have never done an install of a fuel pump on a legacy GT, but how hard could it be?? Tragedy, Well this install would have worked out fine If I hadn’t broken off the nipple from the output fitting, while installing the o-ring adapter from the OEM pump. This was of course the only pump we had so we would be putting the OEM fuel pump to the test! Could it do 400WHP?? * Registered users of the site do not see these ads. Last edited by PERRINJeff; 10-22-2007 at 10:27 PM.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
FS : VT Red Perrin Topfeed Fuel rail kit,Greddy BOV,STi pinks,Samco Intercooler hoes, TGVs	riderdude125	NESIC Private Classifieds	12	06-19-2010 04:48 PM
FS : VT.Red Perrin Topfeed Fuel rail kit,Greddy BOV,STi pinks,Samco Intercooler hoes, TGVs	riderdude125	Engine/Power/Exhaust	2	06-05-2010 09:44 AM
PERRIN - 2008WRX: Perrin 2008 Subaru WRX Hatchback Build	PERRINJeff	NASIOC Project Cars	44	03-09-2010 12:38 PM
PERRIN - 2008WRX: Building The Exhaust	PERRINJeff	NASIOC Project Cars	14	07-24-2009 05:14 PM
PERRIN - 2008WRX: Project Overview	PERRINJeff	NASIOC Project Cars	9	12-11-2007 10:16 PM

10-21-2007, 08:19 PM	#2
PERRINJeff NASIOC Manufacturer Member#: 74110 Join Date: Nov 2004 Location: PERRIN Performance

11-05-2007, 11:58 PM	#3
wRxbeater11 Scooby Specialist Member#: 12682 Join Date: Nov 2001 Chapter/Region: Tri-State Location: Farmingdale, 07727	Jesus looks like fun.

03-20-2009, 11:47 PM	#4
REDCHARGE Scooby Newbie Member#: 187304 Join Date: Aug 2008 Location: NY Vehicle: 2008 WRX RALLY BLUE	reminds me of my escort pump.....hehehehee 4 screw drivers is right .