Boost control on an AEL

[AndyP]

I hooked up a boost gauge to my 2.5TDi last night to check everything is as it should be before chipping it. Now I've found it's boosting too much, it's supposed to have 0.8bar ( 12psi ) but the boost just ssems to keep building as the revs rise. I did a short burst of WOT and backed off when it was at 19psi and still rising

Looking at the turbo, it seems the wastegate is built into the hot side, so I'm thinking it's stuck shut, does this sound right?

[K7ERG]

Could be stuck or there is a chip there already. I am sure Spinks chips go to 1.3bar so around 19psi.

Does the car go well?

[GT500]

Yes it does!
Shakes its prop like a good un!

Had a go yesterday.

[K7ERG]

My last one did that with 160bhp 340nm which was chipped by previous owner.(unknown make). The one I have now doesnt and its 201bhp 406nm using Spinks chip @ 0.9 bar with 3" system, k24 and some other mods

[AndyP]

Could be chipped already, I must admit I was expecting it to be quicker than it is if it has been chipped. It seems to be making tons of boost but not getting the fuel to match, I'll have to pull the ECU and have a look.

[MGaz]

I hooked up a boost gauge to my 2.5TDi last night to check everything is as it should be before chipping it. Now I've found it's boosting too much, it's supposed to have 0.8bar ( 12psi ) but the boost just ssems to keep building as the revs rise. I did a short burst of WOT and backed off when it was at 19psi and still rising

Looking at the turbo, it seems the wastegate is built into the hot side, so I'm thinking it's stuck shut, does this sound right?

my question is, how do you connect a permanent boost gauge? :mischeif:

Also, I remember seeing one nicely mounted in the centre air vent on someone's C4 A6 . looked good. any idea where i can buy one like this?

[AndyP]

I bought this

http://www.ebay.co.uk/itm/2505308287...84.m1497.l2649

and spliced it into the 8mm line at the back of the inlet manifold, then just used std 4mm vacuum line to the boost gauge. It's taped to the dash at the moment while I work out how to get it into the centre vent

[MGaz]

I bought this

http://www.ebay.co.uk/itm/2505308287...84.m1497.l2649

and spliced it into the 8mm line at the back of the inlet manifold, then just used std 4mm vacuum line to the boost gauge. It's taped to the dash at the moment while I work out how to get it into the centre vent

is there like a proper vent/bracket mount that will fit in place of the original centre vent? The one i remember seeing a picture of looked like it was 'meant' to be there. Had a real nice fit.

[AndyP]

I think there is, :corey: used to know where to get them from, I'm just going to get a spare vent and put a hole cutter through it.

[MGaz]

I hooked up a boost gauge to my 2.5TDi last night to check everything is as it should be before chipping it. Now I've found it's boosting too much, it's supposed to have 0.8bar ( 12psi ) but the boost just ssems to keep building as the revs rise. I did a short burst of WOT and backed off when it was at 19psi and still rising

Looking at the turbo, it seems the wastegate is built into the hot side, so I'm thinking it's stuck shut, does this sound right?

where does the ECU get its boost readings from? is it from the same pipe at the back of the inlet that you fitted your boost gauge to?

Also,.. seeing as the EGR on these cars gunk up the insides of the inlet manifold, would some of the crap get forced in to the pipe on the back of the inlet manifold causing an incorrect boost reading ? Just thinking out loud.

[turboaudis4]

i took the clock out of my urs4 & put a boost gauge in my dash i have pics somewhere