3 port boost solenoid
13 September 2004, 05:24 PM
#1
Scooby Regular
Thread Starter
Join Date: Jul 2003
Location: Behind the wheel of a Time Attack R33 GTR
Posts: 5,734
Likes: 0
Received 0 Likes
on
0 Posts
3 port boost solenoid
What exactly is this?? Im due to be having my WRX mapped to just over 300bhp, so do i need one of these?? or do i already have one?
What do they actually do?
Thanks wise techy people!
Neil.
What do they actually do?
Thanks wise techy people!
Neil.
13 September 2004, 05:45 PM
#2
Firstly what year is your car?
Two port solenoids generally came in around 1997 replacing the 3 port.
Basically when playing about with boost levels and going for higher power it's better to use the 3 port because it gives better boost control
Two port solenoids generally came in around 1997 replacing the 3 port.
Basically when playing about with boost levels and going for higher power it's better to use the 3 port because it gives better boost control
13 September 2004, 06:31 PM
#3
Scooby Regular
Join Date: Nov 2000
Location: 32 cylinders and many cats
Posts: 18,658
Likes: 0
Received 1 Like
on
1 Post
It switches the pressure signal to the wastegate from either atmospheric pressure or boost pressure. This means you can have as much boost as the wastegate will allow before being blown open, or you can have the minimum the wastegate will allow by feeding all the boost pressure to it.
A 2 port is unable to bleed enough off to allow the wastegate to see atmospheric pressure. It works on lower airflows and pressures through the pneumatic tubing because of a restrictor, which is necessary to allow it to get the pressure at the wastegate diaphragm down.
A 2 port is unable to bleed enough off to allow the wastegate to see atmospheric pressure. It works on lower airflows and pressures through the pneumatic tubing because of a restrictor, which is necessary to allow it to get the pressure at the wastegate diaphragm down.
13 September 2004, 06:33 PM
#4
Scooby Regular
iTrader: (3)
Join Date: Jan 2003
Location: South Wales - Stuck on this rollercoaster, get me off!!
Posts: 5,350
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Neilo
What exactly is this?? Im due to be having my WRX mapped to just over 300bhp, so do i need one of these?? or do i already have one?
What do they actually do?
Thanks wise techy people!
Neil.
What do they actually do?
Thanks wise techy people!
Neil.
Neil, it's been almost a year mate since we were stuck in a queue at Santa Pod having a chat. You said then you were'nt thinking of doing much to the car, I see you've change your mind a little
Are going this year mate?
simb
13 September 2004, 06:47 PM
#5
Scooby Regular
Thread Starter
Join Date: Jul 2003
Location: Behind the wheel of a Time Attack R33 GTR
Posts: 5,734
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by simb 2
Neil, it's been almost a year mate since we were stuck in a queue at Santa Pod having a chat. You said then you were'nt thinking of doing much to the car, I see you've change your mind a little
Are going this year mate?
simb
Are going this year mate?
simb
nice to see im remembered!!! and yes....plans did change a touch 
getting the car mapped on the 1st, just in time for jap performance show back at the pod!! Are you going?? if so ill give you a run I cant wait, its going to be great
P.S. its a 2003 UK car by the way !!!! so im guessing i have a 2 port....will this hold up?? i dont anticipate the boost being higher than 1.3 bar.
13 September 2004, 06:55 PM
#7
Scooby Regular
Join Date: Jul 2004
Posts: 106
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by john banks
It switches the pressure signal to the wastegate from either atmospheric pressure or boost pressure. This means you can have as much boost as the wastegate will allow before being blown open, or you can have the minimum the wastegate will allow by feeding all the boost pressure to it.
A 2 port is unable to bleed enough off to allow the wastegate to see atmospheric pressure. It works on lower airflows and pressures through the pneumatic tubing because of a restrictor, which is necessary to allow it to get the pressure at the wastegate diaphragm down.
A 2 port is unable to bleed enough off to allow the wastegate to see atmospheric pressure. It works on lower airflows and pressures through the pneumatic tubing because of a restrictor, which is necessary to allow it to get the pressure at the wastegate diaphragm down.
1. Would changing to an aftermarket 3-port solenoid offer any benefit to a standard car fitted with a factory 2-port solenoid (i.e. my unmodified MY99 UK car)? Specifically, would it make the car any smoother or add more mid-range torque, etc.?
2. If it would have a positive effect, what is involved in fitting one? Is it simply a case of locating and removing the in-line restrictor, or does that remain in-situ?
Cheers,
Andy
Trending Topics
13 September 2004, 08:51 PM
#10
Scooby Regular
Join Date: Nov 2000
Location: 32 cylinders and many cats
Posts: 18,658
Likes: 0
Received 1 Like
on
1 Post
Fitting is easy - just goes on the old mounts and the plug needs minor modification. Whether the duty cycles in the ECU are correct is another matter, so really it benefits from a remap to avoid under or more likely overboost.
You can pick up used solenoids from breakers for about £30.
You can pick up used solenoids from breakers for about £30.
13 September 2004, 10:07 PM
#11
Scooby Regular
iTrader: (5)
Join Date: Feb 2003
Location: Worcester
Posts: 2,625
Likes: 0
Received 0 Likes
on
0 Posts
don't know if it was Bobs mapping or the 3 port but my 02wrx hits 1.3 the defi alarm sounds and the boost stays put, so much different to the dancing boost gauge that I used to have
13 September 2004, 10:39 PM
#12
Neilo
John's answer spot on
The Bugeye OEM ECU can't cope with the 3 port so it's best to fit it at the time of mapping. Bob Rawle fits them at the same time as strapping on the rest of the mapping kit
It goes with the territory
Shaun
John's answer spot on
The Bugeye OEM ECU can't cope with the 3 port so it's best to fit it at the time of mapping. Bob Rawle fits them at the same time as strapping on the rest of the mapping kit
It goes with the territory
Shaun
13 September 2004, 10:56 PM
#13
Scooby Regular
Thread Starter
Join Date: Jul 2003
Location: Behind the wheel of a Time Attack R33 GTR
Posts: 5,734
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Midlife......
Neilo
John's answer spot on
The Bugeye OEM ECU can't cope with the 3 port so it's best to fit it at the time of mapping. Bob Rawle fits them at the same time as strapping on the rest of the mapping kit
It goes with the territory
Shaun
John's answer spot on
The Bugeye OEM ECU can't cope with the 3 port so it's best to fit it at the time of mapping. Bob Rawle fits them at the same time as strapping on the rest of the mapping kit
It goes with the territory
Shaun
14 September 2004, 01:11 AM
#14
Scooby Regular
iTrader: (3)
Join Date: Oct 2002
Location: Aberdeenshire
Posts: 2,787
Likes: 0
Received 0 Likes
on
0 Posts
I quizzed Andy Forrest about this the other day and he responded that he wouldn't bother with one unless running > 1.2bar. Seeing as i will be having mine remapped shortly i am going to have one ready for then as a precaution.
14 September 2004, 06:23 PM
#16
Scooby Regular
Join Date: May 2001
Posts: 823
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Midlife......
Neilo
John's answer spot on
The Bugeye OEM ECU can't cope with the 3 port so it's best to fit it at the time of mapping. Bob Rawle fits them at the same time as strapping on the rest of the mapping kit
It goes with the territory
Shaun
John's answer spot on
The Bugeye OEM ECU can't cope with the 3 port so it's best to fit it at the time of mapping. Bob Rawle fits them at the same time as strapping on the rest of the mapping kit
It goes with the territory
Shaun
17 September 2004, 05:00 PM
#21
Scooby Regular
Join Date: Aug 2002
Posts: 5,206
Likes: 0
Received 0 Likes
on
0 Posts
John or anyone
Would it be a good idea to install an uprated fuel pump at the time of changing to the 3 port boost solenoid?
ie. Is it something that would need to be installed prior to map or doesn't the map effct the uprated fuel pump
Pete
Would it be a good idea to install an uprated fuel pump at the time of changing to the 3 port boost solenoid?
ie. Is it something that would need to be installed prior to map or doesn't the map effct the uprated fuel pump
Pete
Thread
Thread Starter
Forum
Replies
Last Post
Mattybr5@MB Developments
Full Cars Breaking For Spares
28
28 December 2015 11:07 PM