russell hayward

Checked where my boost gauge is connected.

It is T'd into a small pipe which is connected between the big hose/pipe from the intercooler to the turbo. The other end of the existing pipe is connected to the round brass coloured thingy on the turbo, which has another T piece in it which looks standard. Can't see any spare ports visible on the inlet manifold.

Sorry for my ignorance on the proper part names.

Any help appreciated.

PS Neil, glad you like the seats !

russell hayward

Have an HKS boost gauge. Should I be getting negative readings. Positive readings are OK but the needle dies not go any lower than zero. I was under the impression negative readings should occur at idle etc.

Bob Rawle

Hi, you have the boost guage connected to the wrong place under the bonnet,
connect to the feed pipe for the pressure sensor not the turbo outlet

Ian Cook

If anyone knows its Bob

If you have a 99 car or newer there is a spare port on the inlet manifold, has a short black peice of rubber, its to the left of another pipe, you can use this spare port to connect the boost gauge without cutting anything. Its the place the STi boost gauge tells you to connect to.

russell hayward

bob can you tell me where to look please ?

Thanks.

subverbal

Hi Russell

Seats are excellent !!
Bob fitted an STi boost gauge along with the Link ECU and HKS induction filter to my 'old' car. Quite a difference in accelleration coupled with the sound of the filter - big smiles all round.

Bob - well chuffed ! Will talk to you soon.

Neil Marchant.

Ian Cook

Russel, what age is the car ?

On the manifold on top of the engine, on the right hand side, there is a small black pipe that goes towards the back of the car under the intercooler, on my 99 MY there is a second pipe to the left of this (i think on the 98 and earlier you can see a spot where this would be) this has a peice of rubber about 1 inch long pushed onto it, this is the spare port. If you dont have this, the black pipe to its right is the correct pipe (hopefully Bob can confirm this, its a while since i looked under the bonnet of a pre 99 car) that you should T the gauge off of. I will see if i can find the instructions for my STi gauge it had full diagrams on it for all Impreza's, and i will try to scan and email it to you if i can ! no guarantees, its been a few months since i did it

It sounds like yours is connected to the wrong pipe anyway !!!

russell hayward

The car is a P1.

Took a trip to see my mate Curtis at Powerstation. The gauge was T'd directly off the turbo (as I could see). A quick change and it was T'd on to the inlet manifold and full service was resumed.

However now peak boost is about 1.1 holding at 1, whereas before it was 1.3 holding at 1. Does this seem normal dur to the resiting of the pipe ??

Also, where it was T'd originally, there is a small restrictor in the pipe. Does this have to go back in any particular way or does it make no difference ? I floored it in 5th on the way home from 40 mph and boost went upto 1 bar, then dropped back to 0.5 bar until about 100mph, then it rose again.Just wondered if the restrictor could be fitted the wrong way ???

thanks

Russell

IWatkins

Russell

Cannot help you on your troubles, I would go see who ever fitted your gauge pod and get them to sort it out after giving them a kicking One reason why your gauge isn't going so high now *maybe* because of the pressure drop once the air has travelled through the intercooler and into the intake manifold.

Great sight following you out of Cheltenham this afternoon, as we passed all the traffic in the outside lane on the road past Tescos, all I could see was heads turning to the right as you went past.

Cheers

Ian

P.S. That brake kit is very nice.

Ian Cook

Hmm, would have thought the P1 would have the same extra port on the inlet manifold?

on the T piece that came with my STi boost gauge there was a restrictor in the T itself, but it wasnt needed when connecting to the manifold. I get 1 bar max, and it holds about .9, this is on a UK car though. Boost wont normally hold all the way through the rev range either, it tends to tail off unless the ECU has been reprogrammed not to, AFAIK anyway. Bobs the man to say if thats right though.

Do you now get negative boost readings though ?

russell hayward

Ian W : Didn't realise you were behind me. I was too busy looking at those negative readings ! What car were you in ?? I'd just been to Car HiFi to discuss the install. It was strange with the boost holding back like that. Only did it the once. Perhaps Bob can help ??? Perhaps we should organise a local meet ....

Ian C : Yes, there is a restrictor in the T piece, and it's still there. Again I hope Bob can guide me on which ones need/need not be there (please)!!

Thanks everyone for your help.

russell hayward

ps how do you get those smilies into your messages ??

Ian Cook

smilies, : ) but take the space out, check the FAQ at the top of the page it lists a few.

IWatkins

Russell

I was in my white GT4, joined behind you at Tescos and followed you to the Shell garage at the roadworks.

Of course, if you are really stuck on this problem (sure will be sorted in next 12 hours anyway, what with all the knowledgable guys here), you could always drop back into Powerstation and ask Rich to take a look.

And I'll be telling Curtis that you have been to the enemy for hifi

Cheers

Ian

sunilp

Ian, Russ is saying that the restrictor was there where it was T'd off originally....what is not clear is whether the restrictor was in the pipe originally (i.e. before the gauge install) or was inserted into the pipe as part of the gauge install. Not sure what the implications are for the former, but for the latter the restrictor should (AFAIK) go into the pipe with the gauge as its there to stop spikey readings and smooth the needle action (well thats what i was told with my HKS gauges!).

Russ, can you clarify?

As usual i could be talking absolute pants!

russell hayward

The restrictor was in the pipe originally before the gauge was instaled AFAIK .

There is also a restrictor in the actual T piece that came with the gauge.

Bob Rawle

Russell, mailed you to ring me, bit long winded to explain here, sounds as though the restrictor has been fitted in the wrong place or omitted. Give me a call.

russell hayward

Spoke to Bob and everything is O.K.

The reduction in boost I experienced could have been the ECU sensing some knock or things getting a bit too hot in yesterday's heat.

Many thanks Bob, top guy !!

Ian Cook

Said Bob was the man didnt I