Would 740cc injectors give me 400bhp at 3bar of pressure?
24 January 2007, 09:40 PM
#1
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Mar 2004
Location: N.Ireland
Posts: 4,088
Likes: 0
Received 0 Likes
on
0 Posts
Would 740cc injectors give me 400bhp at 3bar of pressure?
For people in the know.
I am looking to run my 2002 STI at roughly 400bhp and i know i need to get my ECUTEK mapped to roughly 1.5-1.6 bar at the top end of rpm to produce this.
I know i need to up the fuel pressure from 3bar to 3.5 or 4bar to be able to keep existing 505cc STI Pink injectors and dont have an adjustable regulator to do this.
If i was to purchase a set of 740cc injectors could i just use standard fuel pressure to run 400bhp and therefore not have to purchase an adjustable fuel pressure regulator?
I am looking to run my 2002 STI at roughly 400bhp and i know i need to get my ECUTEK mapped to roughly 1.5-1.6 bar at the top end of rpm to produce this.
I know i need to up the fuel pressure from 3bar to 3.5 or 4bar to be able to keep existing 505cc STI Pink injectors and dont have an adjustable regulator to do this.
If i was to purchase a set of 740cc injectors could i just use standard fuel pressure to run 400bhp and therefore not have to purchase an adjustable fuel pressure regulator?
24 January 2007, 09:53 PM
#3
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Mar 2004
Location: N.Ireland
Posts: 4,088
Likes: 0
Received 0 Likes
on
0 Posts
whats the turbo got to do with it??? 
I have an APS SR40 turbo capable of 440bhp and Hyperflow TMIC, 3 inch System, Ecutek tek 3, Equal length headers, 3 inch up pipe and dopwnpipe all wrapped, perrin intake, aps cast induction hose with k and n filter in wing, avcr boost controller etc...etc
now btt for somone that knows what they are talking about
I have an APS SR40 turbo capable of 440bhp and Hyperflow TMIC, 3 inch System, Ecutek tek 3, Equal length headers, 3 inch up pipe and dopwnpipe all wrapped, perrin intake, aps cast induction hose with k and n filter in wing, avcr boost controller etc...etc
now btt for somone that knows what they are talking about
24 January 2007, 09:56 PM
#5
Scooby Regular
Oops you posted before I read your other post.
I'm running 650's to get 400, and a friend on mine is running 650's also. I run an SX fuel reg with mine, and he doesn't.
I'm running 650's to get 400, and a friend on mine is running 650's also. I run an SX fuel reg with mine, and he doesn't.
Trending Topics
24 January 2007, 10:03 PM
#8
Scooby Regular
Got mine here:
650cc Injectors Subaru Impreza 00-06 Flat4online.co.uk Subaru Impreza Mitsubishi Evolution EVO Walbro Fuel Pumps Injectors Intercoolers
I run 3.7 hot idle with the SX reg. I can find out what pressure my mate runs with the SX.
650cc Injectors Subaru Impreza 00-06 Flat4online.co.uk Subaru Impreza Mitsubishi Evolution EVO Walbro Fuel Pumps Injectors Intercoolers
I run 3.7 hot idle with the SX reg. I can find out what pressure my mate runs with the SX.
24 January 2007, 10:08 PM
#9
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Mar 2004
Location: N.Ireland
Posts: 4,088
Likes: 0
Received 0 Likes
on
0 Posts
Got mine here:
650cc Injectors Subaru Impreza 00-06 Flat4online.co.uk Subaru Impreza Mitsubishi Evolution EVO Walbro Fuel Pumps Injectors Intercoolers
I run 3.7 hot idle with the SX reg. I can find out what pressure my mate runs with the SX.
650cc Injectors Subaru Impreza 00-06 Flat4online.co.uk Subaru Impreza Mitsubishi Evolution EVO Walbro Fuel Pumps Injectors Intercoolers
I run 3.7 hot idle with the SX reg. I can find out what pressure my mate runs with the SX.
thanks for you help, if you could find out that would be great
24 January 2007, 11:17 PM
#14
Ecu Specialist
The answer to the original question is yes, 740's will be more than adequate, 650's will also hit 400 at std fuel pressures however you would need an uprated fuel pump in any case (Walbro 255).
I would change to 800's to go past 440 on factory pressure using the oem new age ecu.
With a MD321H you would only need to run at 1.4 bar to click over 400 bhp on the std engine btw. Been there mapped that as they say, and most of those using 550cc injectors at std pressure.
cheers
bob
I would change to 800's to go past 440 on factory pressure using the oem new age ecu.
With a MD321H you would only need to run at 1.4 bar to click over 400 bhp on the std engine btw. Been there mapped that as they say, and most of those using 550cc injectors at std pressure.
cheers
bob
25 January 2007, 08:30 AM
#15
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Mar 2004
Location: N.Ireland
Posts: 4,088
Likes: 0
Received 0 Likes
on
0 Posts
The answer to the original question is yes, 740's will be more than adequate, 650's will also hit 400 at std fuel pressures however you would need an uprated fuel pump in any case (Walbro 255).
I would change to 800's to go past 440 on factory pressure using the oem new age ecu.
With a MD321H you would only need to run at 1.4 bar to click over 400 bhp on the std engine btw. Been there mapped that as they say, and most of those using 550cc injectors at std pressure.
cheers
bob
I would change to 800's to go past 440 on factory pressure using the oem new age ecu.
With a MD321H you would only need to run at 1.4 bar to click over 400 bhp on the std engine btw. Been there mapped that as they say, and most of those using 550cc injectors at std pressure.
cheers
bob
I take it my standard pink injectors wont take me to 400bhp then at standard pressure?
Last edited by scoobboy; 25 January 2007 at 05:51 PM.
25 January 2007, 12:43 PM
#18
Former Sponsor
iTrader: (20)
Join Date: Oct 2006
Location: 8.95 @ 168mph. Zero to 1KM 194.1mph
Posts: 1,150
Likes: 0
Received 0 Likes
on
0 Posts
Scoobboy,
If you can get Subaru fit 650cc injectors for £200, please let me know where from.
Here's a comparison of a re-mapped P1 running a VF28, v an MD321H on the same car.
The MD321H competes very well low down with the much smaller VF28, and then goes on to give another 87bhp !
Both mapped, and information supplied by Bob Rawle.
If you can get Subaru fit 650cc injectors for £200, please let me know where from.
Here's a comparison of a re-mapped P1 running a VF28, v an MD321H on the same car.
The MD321H competes very well low down with the much smaller VF28, and then goes on to give another 87bhp !
Both mapped, and information supplied by Bob Rawle.
25 January 2007, 05:31 PM
#19
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Mar 2004
Location: N.Ireland
Posts: 4,088
Likes: 0
Received 0 Likes
on
0 Posts
Scoobboy,
If you can get Subaru fit 650cc injectors for £200, please let me know where from.
Here's a comparison of a re-mapped P1 running a VF28, v an MD321H on the same car.
The MD321H competes very well low down with the much smaller VF28, and then goes on to give another 87bhp !
Both mapped, and information supplied by Bob Rawle.
If you can get Subaru fit 650cc injectors for £200, please let me know where from.
Here's a comparison of a re-mapped P1 running a VF28, v an MD321H on the same car.
The MD321H competes very well low down with the much smaller VF28, and then goes on to give another 87bhp !
Both mapped, and information supplied by Bob Rawle.
26 January 2007, 11:26 AM
#22
Scooby Regular
Join Date: Dec 2005
Posts: 294
Likes: 0
Received 0 Likes
on
0 Posts
Can this be achieved on an 01 JDM STI using the standard top mount intercooler and a full 2.5" scoobysport decat exhaust system or is a FMIC and 3" exhaust system required ?
Thanks
Ken
26 January 2007, 12:29 PM
#24
Former Sponsor
iTrader: (20)
Join Date: Oct 2006
Location: 8.95 @ 168mph. Zero to 1KM 194.1mph
Posts: 1,150
Likes: 0
Received 0 Likes
on
0 Posts
Scoobboy,
I don't sell the Sard brand, I sell the Power Enterprise brand, which uses a different method to seal the bottom o ring, which I prefer.
The Power Enterprise have an extra groove, and o ring, and they are a bit more expensive than the Sard.
If you want to call me, I'll see what I can do for you. Alternatively, I have the Fuelab billet regulator kits in stock, which with increased fuel pressure, should give you 400bhp on the STi Pinks, and save you money.
Mark.
I don't sell the Sard brand, I sell the Power Enterprise brand, which uses a different method to seal the bottom o ring, which I prefer.
The Power Enterprise have an extra groove, and o ring, and they are a bit more expensive than the Sard.
If you want to call me, I'll see what I can do for you. Alternatively, I have the Fuelab billet regulator kits in stock, which with increased fuel pressure, should give you 400bhp on the STi Pinks, and save you money.
Mark.
26 January 2007, 02:16 PM
#25
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Mar 2004
Location: N.Ireland
Posts: 4,088
Likes: 0
Received 0 Likes
on
0 Posts
Scoobboy,
I don't sell the Sard brand, I sell the Power Enterprise brand, which uses a different method to seal the bottom o ring, which I prefer.
The Power Enterprise have an extra groove, and o ring, and they are a bit more expensive than the Sard.
If you want to call me, I'll see what I can do for you. Alternatively, I have the Fuelab billet regulator kits in stock, which with increased fuel pressure, should give you 400bhp on the STi Pinks, and save you money.
Mark.
I don't sell the Sard brand, I sell the Power Enterprise brand, which uses a different method to seal the bottom o ring, which I prefer.
The Power Enterprise have an extra groove, and o ring, and they are a bit more expensive than the Sard.
If you want to call me, I'll see what I can do for you. Alternatively, I have the Fuelab billet regulator kits in stock, which with increased fuel pressure, should give you 400bhp on the STi Pinks, and save you money.
Mark.
Is it a hard job to fit and whats involved and what is max bhp can be produced safely on pinks
17 May 2007, 01:58 PM
#30
Scooby Regular
Join Date: Mar 2007
Location: The right side of 30psi
Posts: 539
Likes: 0
Received 0 Likes
on
0 Posts