Maximum output of stock EJ22 Turbocharger and stock fuel pum
Posted: Sat Aug 31, 2002 6:50 pm
-----Original Message-----
From: William D. Robinson [mailto:vultureboy@mindspring.com]
Sent: Saturday, August 31, 2002 3:12 PM
To: BC-BFLegacyGroups@yahoo.com
Subject: RE: Maximum output of stock EJ22 Turbocharger and stock fuel
pump.
It has been my experience that the first weak link you encounter when
turning up the boost is the stock fuel pump. Walbro makes a high flow pump
that fits a lot of cars like ours. I think mine fits a MItsubishi Eclipse.
It is an essential investment. While you are at it, solder a stout jumper
around that problematic fuel pump connector under the passenger side rear
seat. Odds are that when you first look at that white connector, it will
already be cooked brown and showing signs of excessive resistance.
At about the same time you upgrade the fuel pump, you will want to install
an intercooler and duct it for lots of airflow coming through a bigger
scoop, such as the scoop off a 98 Impreza RS or Impreza Outback. Our stock
hoodscoops were never intended for an air-to-air application and are
inadequate.
The next step is to add a rising rate fuel pressure regulator. 2/1 ratio is
probably fine. I have a Vortech 4/1 unit that works well, but I might be a
tad rich at max boost.
When I installed the Mitsubishi T-04 turbocharger from a JDM Legacy on my 92
Lagacy EJ22T, I had to make some modifications in the exhaust, so I never
had the experience of changing nothing but the turbo. I guess the new one
flows better, but maybe most of that improvement is the 3" exhaust and
custom downpipe. Nobody knows!
I do know this however: When I turned up the intercooled boost to around
13psi, with the stock turbo, half throttle was as fast as full throttle.
When I upgraded the turbo and exhaust it was faster, but half was still as
good as full. When I upgraded the fuel pump to the Walbro unit, half was
half and full became full. The fuel pump and its connector are the key to a
poor man's Nirvana and they are cheap.
Bill Robinson
From: William D. Robinson [mailto:vultureboy@mindspring.com]
Sent: Saturday, August 31, 2002 3:12 PM
To: BC-BFLegacyGroups@yahoo.com
Subject: RE: Maximum output of stock EJ22 Turbocharger and stock fuel
pump.
It has been my experience that the first weak link you encounter when
turning up the boost is the stock fuel pump. Walbro makes a high flow pump
that fits a lot of cars like ours. I think mine fits a MItsubishi Eclipse.
It is an essential investment. While you are at it, solder a stout jumper
around that problematic fuel pump connector under the passenger side rear
seat. Odds are that when you first look at that white connector, it will
already be cooked brown and showing signs of excessive resistance.
At about the same time you upgrade the fuel pump, you will want to install
an intercooler and duct it for lots of airflow coming through a bigger
scoop, such as the scoop off a 98 Impreza RS or Impreza Outback. Our stock
hoodscoops were never intended for an air-to-air application and are
inadequate.
The next step is to add a rising rate fuel pressure regulator. 2/1 ratio is
probably fine. I have a Vortech 4/1 unit that works well, but I might be a
tad rich at max boost.
When I installed the Mitsubishi T-04 turbocharger from a JDM Legacy on my 92
Lagacy EJ22T, I had to make some modifications in the exhaust, so I never
had the experience of changing nothing but the turbo. I guess the new one
flows better, but maybe most of that improvement is the 3" exhaust and
custom downpipe. Nobody knows!
I do know this however: When I turned up the intercooled boost to around
13psi, with the stock turbo, half throttle was as fast as full throttle.
When I upgraded the turbo and exhaust it was faster, but half was still as
good as full. When I upgraded the fuel pump to the Walbro unit, half was
half and full became full. The fuel pump and its connector are the key to a
poor man's Nirvana and they are cheap.
Bill Robinson