Boost pressure

Sweety · 31-01-2015, 01:48

On a 2.7TDI T2 am I right in thinking the standard boost pressure should be around 0.9bar / 12-13psi ? The reason I'm asking is my old gauge used to show 1.2bar but the new gauge is showing 0.75bar

now I'm sure the old gauge was over reading a bit & at time would get to 1bar then jump to 1.2. What I noticed when fitting the new gauge was the T that came with it had a brass insert with a tiny hole in it on the part that the hose fits on to go to the gauge but the old T didn't have this so was wondering if the full boost pressure isn't reaching the gauge:

if it makes any difference the new gauge uses 3mm ID hose where the old one had 3mm ID 3.5" long which went into a brass fitting & had 1mm semi ridged pipe coming out of it to the gauge only thing I can think of is poss swapping over the It's to see if that makes any difference

Sweety · 31-01-2015, 14:59

Well changed the T piece & the readings are still the same so must have a gauge that likes to under read

was going to tweak the boost a little but the lock nut is stuck fast so was scared to keep trying in case I bent the rod

what's the best way of doing it hold the rod with a pair of vice grips whilst slackening the lock nut

& how many turn of the rod will I need just want to up it a bit but not to the point I start to run lean fuel wise

Banshee · 31-01-2015, 16:20

Quote:

Originally Posted by Sweety

Well changed the T piece & the readings are still the same so must have a gauge that likes to under read

was going to tweak the boost a little but the lock nut is stuck fast so was scared to keep trying in case I bent the rod

what's the best way of doing it hold the rod with a pair of vice grips whilst slackening the lock nut

& how many turn of the rod will I need just want to up it a bit but not to the point I start to run lean fuel wise

Dude get some pics up and that, I want to do this mod

rustic · 31-01-2015, 16:50

I fitted a boost gauge to mine, but there was quite a lot of turbo noise transmitted to the dial assembly, so I fitted a restrictor in the line to the meter, and this stopped the noise, and didn't affect the meter accuracy, or speed of response.
So maybe this answers the query of why a plug with a fine hole was fitted on one of your meters.

Banshee · 31-01-2015, 19:20

Quote:

Originally Posted by rustic

I fitted a boost gauge to mine, but there was quite a lot of turbo noise transmitted to the dial assembly, so I fitted a restrictor in the line to the meter, and this stopped the noise, and didn't affect the meter accuracy, or speed of response.
So maybe this answers the query of why a plug with a fine hole was fitted on one of your meters.

Different with yours though bud as you just "T" piece off the vac pipe near the actuator don't you?

The TDi's are different but I really want to fit one

rustic · 31-01-2015, 19:33

Quote:

Originally Posted by Banshee

Different with yours though bud as you just "T" piece off the vac pipe near the actuator don't you?

The TDi's are different but I really want to fit one

Yes I "T'd" off the small pipe that connects to the aluminium pipe that has TURBO on it. No intercooler on mine.

Sweety · 01-02-2015, 17:35

Quote:

Originally Posted by Banshee

Dude get some pics up and that, I want to do this mod

Here you go Banshee pic of it plumbed into the turbo

Sweety · 01-02-2015, 17:35

Closer pic

Banshee · 01-02-2015, 18:14

So you've got the pipe going of the actuator and then T pieced it further down to re-attach the original actuator pipe?

31-01-2015, 01:48	#1
Sweety Senior Member Join Date: May 2013 Location: Northumberland Vehicle: Terrano 2.7TDI SE LWB Posts: 3,604	Boost pressure On a 2.7TDI T2 am I right in thinking the standard boost pressure should be around 0.9bar / 12-13psi ? The reason I'm asking is my old gauge used to show 1.2bar but the new gauge is showing 0.75bar now I'm sure the old gauge was over reading a bit & at time would get to 1bar then jump to 1.2. What I noticed when fitting the new gauge was the T that came with it had a brass insert with a tiny hole in it on the part that the hose fits on to go to the gauge but the old T didn't have this so was wondering if the full boost pressure isn't reaching the gauge: if it makes any difference the new gauge uses 3mm ID hose where the old one had 3mm ID 3.5" long which went into a brass fitting & had 1mm semi ridged pipe coming out of it to the gauge only thing I can think of is poss swapping over the It's to see if that makes any difference

31-01-2015, 16:50	#4
rustic Senior Member Join Date: Feb 2007 Location: Staffordshire Vehicle: Maverick Mk I 2.7 TD LWB Posts: 7,825	I fitted a boost gauge to mine, but there was quite a lot of turbo noise transmitted to the dial assembly, so I fitted a restrictor in the line to the meter, and this stopped the noise, and didn't affect the meter accuracy, or speed of response. So maybe this answers the query of why a plug with a fine hole was fitted on one of your meters. __________________ Ford Maverick GLX 1995 2.7TD LWB in illusion silver, 98k miles. Owned since new, for 22 years. Best car I have ever owned. Just wish I could drive it more.

01-02-2015, 18:14	#9
Banshee Moderator Join Date: Jul 2012 Location: West Midlands Vehicle: 04 2.7 SWB Terrano II Van Posts: 13,526	So you've got the pipe going of the actuator and then T pieced it further down to re-attach the original actuator pipe? __________________ Moderator 04' Terrano II SE 2.7 TDi SWB Commercial in Silver - Project Thread Toyo Open Country M/T 33's on 10J Steels, Super Strong Steering Job Navara D22 Snorkel, Front LOKKA, Maunal Hubs, EGR Blank TunitII ECU Chip, 3" Body Lift, 2" Suss Lift, Heat Exchanger Black Interior, 3.0 Borg&Beck Clutch, Eckes Heated Fuel Filter 99' Y61 Patrol GR SE 2.8 TD6 LWB in Blue/Silver - Project Thread Engine Transplant - In Progress!!!

31-01-2015, 14:59	#2
Sweety Senior Member Join Date: May 2013 Location: Northumberland Vehicle: Terrano 2.7TDI SE LWB Posts: 3,604	Well changed the T piece & the readings are still the same so must have a gauge that likes to under read was going to tweak the boost a little but the lock nut is stuck fast so was scared to keep trying in case I bent the rod what's the best way of doing it hold the rod with a pair of vice grips whilst slackening the lock nut & how many turn of the rod will I need just want to up it a bit but not to the point I start to run lean fuel wise