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I’ve wound the wastegate spring out a bit (it did have the 034 heavy duty spring), and it is stable at full boost, which is right up there at about 1.2 bar above atmospheric. Been out again in it and it’s driving lovely, boosts so strong and early, 2krpm and it is already going for it. My destroyer of worlds is back.
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Oh god yes Dave,I am so going to have a beer later. Thank you for letting me highjack your thread over the last couple of days.
It goes to show, I bought a souped up turbo that led to a Roose boost pipes kit, turbosmart, 034 wastegate spring, N300 ECU, N75, MFTS and it was just the DV installed incorrectly.
The turbosmart and 034 spring are now consigned to the spare parts pile.Leave a comment:
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Two years! Two bloomin’ years since the turbo was fitted and I’ve finally got full boost. Huge thanks to John’s (newish) posts and indeed everyone who has methodically itemised their boost problems over the years. I’ve read them all.Having spent a fair wedge on new boost pipes, a spare ECU, N75 and MFTS I was running out of options. Then John posted this on Dave’s thread...
[quote]This is weird.
If you remove the N75 and fit a manual boost controller you should be able to turn the boost up. So there must be something physically wrong.
WG is very worn and opening itself by leaking through the valve guide.
You have a leak which blows above 0.7bar (but I’m sure you would hear that whooshing)
DV is broken or plumbed wrong.[\quote]
And that got me thinking about DV control.
This morning I replaced all the vacuum pipes and found a couple of life expired ones and then, the smoking gun. The vacuum pipe was off the DV and neatly tucked into the wiring loom clip. Pound to a penny it’s been like that since the turbo change.
Methodically tested and checked everything again and then went for a run. Wham, straight up to full boost, no hesitation, bang!
First time in 2-years.
John, you utter star, thank you. As indeed is this forum for having such a huge breadth of knowledge and technical data....
I’m a happy man today...
As John suspected, the inlet manifold pipes were just toast.
Renewed all the main sections, here’s just a bit of it.
Then found this hiding in the wiring loom clip.
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Very nice I think I will copy you with what you’ve done on your engine bay but without the new hoses just needs a good clean might get that done before it’s paint job. Love your Avant
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Yesterday late afternoon project was to clean everything up before putting the bumper back on.... It came up well.
Took it for a test run an took some pictures whilst I was at it.
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I cannot find a part number that’s obvious. But looking at 7zap ours is definitely 8A0863821N shape and fixings. It’s certainly not rodent proof...
I’ll have another look tomorrow once it stops chucking it down.
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Ah what this?
It is pickling as we speak. Will check out tomorrow.
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Look very nice fitted.
While you have your undertray off, could you take a couple of pics for me and the part number. I'm on the look out for one and the part numbers are very confusing on 7zap. Some say its the same as the 80 cabriolet but I'm not sure.Leave a comment:
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Fitted the new boost hoses today.... My gawd it took an age, fettling jubilee clip positions, tidying, cleaning and occasional profanity.
I’ve finished the plumbing but ran out of time to put the front end back on, so it’s going to bed like this tonight.
Started and shunted the cars about and it runs fine, boost gauge seems to be doing the right things for a quick blip.
Fingers crossed it’s leak free tomorrow and thanks to the forum, used it several times today and it helped immensely.
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