Some questions on tuning Dawes/Needle valves

[Lemo79]

Hey hodge,
I put the EGR block in and fitted my Dawes yesterday, wasn't going to put a needle valve in. I to now have similar problems at 100 as yourself. Boost will settle at 12 flat road no throtle change, then boost will drop to 5, egt will rise to 400 then will go back to 12 egt drop and so on. Was thinking I may need to go the needle valve. Will play a bit more first.

Lemo.

[Lemo79]

Oh, also happy with the quicker spool up since blocking the EGR, much more pleasant around town to drive and I thought I was happy with it before.

[Hodge]

Hey mate good to hear it made a difference. I strongly suggest you get a needle valve too, for more control of the spool up rate. Since I blocked the EGR, I had to come off my needle valve a little but because it was pooling up way too quick. And YES what you described, is exactly my car at the moment. Cruising at a 100, boost bounces everywhere, and with each change, EGT's also change when boost drops. I'm trying to now fine-tune it using very minor adjustments, but it'll take time to find it's sweet spot.
But I repeat again, overall dawes/needle valves changed my car entirely. It's an absolute must.

[mudski]

Put the needle valve in and you will know about quicker spool up.

[Hodge]

Well this morning car began shutting down again while idle. Just like it did after blocking off egr. I've touched and changed nothing and it ran fine. However my Max boost now soared past 17 and it hit low 19s, even though I haven't touched touched any valves for days.
No engine light or anything. I checked for codes and nothing came up.
Hmmm .

[Lemo79]

Going out on a limb here, but did you inspect the throtle body when you done the EGR block, and if so is there a chance you may have swapped the vacuum lines to the two butterflies in the body, so when the ecu is trying to activate the swirl butterfly at idle it is actually activating the shutdown butterfly? Like I said out on a limb, but just a thought.

Lemo.

[mudski]

So it wasnt doing this priorto egr block? Grab the egr plate I have with the hole in it. Sounds very strange but this may be the issue.

[Hodge]

Definitely wasn't doing this prior to egr block. It wasn't doing it prior to Dawes and needle valve either, or after for that matter.
Egr plate in, and kept stalling on idle. No rev change, or any warning at all. Just turns of, it's as if I turn the key.
Then starts back up no dramas.

Funny thing is it began doing it the evening I put the plate in. Then the next day and yesterday it didn't do it. But this morning it's stalling again.

[Hodge]

And yes sorry forgot to mention as per my earlier post. Fort the first time since setting the valves it's boosting above 17 which was my initial Max. And I haven't changed a thing.
Don't know if that may or may not have anything to do with it. I doubt.
Will see how it his this arvo on the way home.

[mudski]

Come past and grab the other plate bud if you want...As Lemo said you haven't changed any of the vac hose at the throttle body. No holes in them or one come off???