3 quick turbo Qs

foggyjames · Apr 1st, 2002, 22:47

1) How does the boost gauge work.

I guess that modern ones have the ECU to blame, but how about older ones.

2) Can any of you guys post a link to a picture of the instrument panel from a T5 / an 850 with a boost gauge?

3) ditto, but for a 940 / 760 (with the one mounted beneath the rev counter). I have line drawings of these, but not photos...note to self...must get out more...

cheers

james

Apr 2nd, 2002, 06:30

I can only comment for my 850 but think all are the same.
The boost pressure for the guage is read by ' anologue' means and not by the ECU.
The reading is taken from a vacume 'tree' just by the throttle body. the vacume/pressure is then taken by a vacume hose into the back of the guage.
What I describe as a tree is a post with about 4 connections for vacume line I think 2 are blanked off with rubber caps.

foggyjames · Apr 2nd, 2002, 08:57

Very interesting - this was my suspicion. I have a 360, and you can get this very gizmo, under the guise of an econometer.

Will be funny telling the local nova owners that its a 'boost' gauge! I guess if I miss the turbo bit off then its not *too* much of a lie :)

Thanks Fraser!

James

Peter Milnes · Apr 2nd, 2002, 23:13

Yes, the higher the vacuum reading the more economically the engine would be running, is how they worked. Little "blast from the past" there.

Your owners handbook should show you pictures of this.

All the best, Peter.

Apr 1st, 2002, 22:47	#1
foggyjames 300 Register Keeper Last Online: Today 01:27 Join Date: Dec 2001 Location: Nottingham	3 quick turbo Qs 1) How does the boost gauge work. I guess that modern ones have the ECU to blame, but how about older ones. 2) Can any of you guys post a link to a picture of the instrument panel from a T5 / an 850 with a boost gauge? 3) ditto, but for a 940 / 760 (with the one mounted beneath the rev counter). I have line drawings of these, but not photos...note to self...must get out more... cheers james __________________ VOC 300-series Register Keeper '13 V70 D4 SE Lux '89 740 Turbo Intercooler '88 360 Turbo Intercooler '84 360 GLT '81 343 GLS R-Sport '79 343 DL '70 164

Apr 2nd, 2002, 06:30	#2
highfive Guest Location:	RE: 3 quick turbo Qs I can only comment for my 850 but think all are the same. The boost pressure for the guage is read by ' anologue' means and not by the ECU. The reading is taken from a vacume 'tree' just by the throttle body. the vacume/pressure is then taken by a vacume hose into the back of the guage. What I describe as a tree is a post with about 4 connections for vacume line I think 2 are blanked off with rubber caps.

Apr 2nd, 2002, 08:57	#3
foggyjames 300 Register Keeper Last Online: Today 01:27 Join Date: Dec 2001 Location: Nottingham	RE: 3 quick turbo Qs Very interesting - this was my suspicion. I have a 360, and you can get this very gizmo, under the guise of an econometer. Will be funny telling the local nova owners that its a 'boost' gauge! I guess if I miss the turbo bit off then its not too much of a lie :) Thanks Fraser! James __________________ VOC 300-series Register Keeper '13 V70 D4 SE Lux '89 740 Turbo Intercooler '88 360 Turbo Intercooler '84 360 GLT '81 343 GLS R-Sport '79 343 DL '70 164

Apr 2nd, 2002, 23:13	#4
Peter Milnes Premier Member Last Online: Apr 10th, 2014 00:01 Join Date: Feb 2002 Location: Tonyrefail	RE: 3 quick turbo Qs Yes, the higher the vacuum reading the more economically the engine would be running, is how they worked. Little "blast from the past" there. Your owners handbook should show you pictures of this. All the best, Peter.

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