Some questions on tuning Dawes/Needle valves

[Hodge]

Mudski helped me big time setting this up. Fkn top bloke.
I've got another patrol now. Seriously, It literally is like another car now. I'm kicking my self for not installing this earlier. Spool up is now so smooth, with boost not being all over the place like it used to be around town. It maxes at 17, no matter what I do. The biggest difference I noticed was in my EGT's. It used to hit 450-500 with ease. I s*** you not, it hasn't gone above 350 since I started tuning it up. So for those without this portion of the NADS, you're missing out! I was gonna block the EGR today too, until I found my little issue below, so I won't touch it until I get this sorted.

At 100km/h , where it's recommended to aim for 10 or so PSI when cruising. I can't seem to make it hold around that PSI at a steady level. It's all over the shop. 15, then drops to 5, then goes to 9, then 11 then 3. I'm trying to hold my foot on the pedal as steady as possible , even tried cruise control on a long stretch of level 100km/h road and it does the same thing. At lower speeds and gears the spool up curve is very smooth, and cruising at 60km/h for example it sits around 5-6 PSI no dramas. So, if this works at lower speeds, why is it bouncing on me around at 100 or above? I've found a nice sweet spot around town for both valves, and I"m worried if I start mucking around with it, I'll lose it. Thoughts ????

The other thing is my exhaust and the snorkel. And this one you'll think I'm a nutter.
Since I began tuning and tinkering with this, I noticed my exhaust sounds different, it has a deeper element to it. Thought it was me, and the stubbies I've had, but even the bloke next door asked me today, If I've changed the exhaust or something because it definitely has more depth to it now.
The snorkel had this sound, like it's taking a breath of fresh air everytime I came off the throttle, but after the valves were fitted and adjusted, it is now completely gone. I have not heard it since.
I understand that now the system is getting more stabilized air pushed in and out through it, but I didn't think I'd actually hear it, not just feel it!

[Sir Roofy]

Lol its balls have dropped and got a deeper voice

[twisties]

I've just fitted this kit (from Mudski too) myself this week and I agree, chalk and cheese! It took a bit of fiddling around to get the right settings but my tooling around tonight I think has got it spot on finally. Can't say mine jumps around at 100kmh, when I could get a stretch of road long enough....

It definitely depends on the slope of the road I'm on, with level ground it sat pretty steady but the merest whiff of uphill and weeeeeeeee boost baby, whereas pre-DAWES/Needle it would immediately drop all pressure as soon as the throttle increased at 100kph.

Quite happy watching the pyro guage now and during heavy acceleration, it wouldn't budge over about 420.

[Hodge]

Lol its balls have dropped and got a deeper voice

Deeper voice or not, it's definitely got balls now!

[mudski]

Deeper voice or not, it's definitely got balls now!

That great to hear Eric. As for the mid range boost. Mine is similar, its hard to get it to hold at the one level. Just play around with it until your happy then set and forget. Put the egr plate in and this will probably change again.
This also goes to show the crd's can benefit alot from this aswell.

[Hodge]

Yeh i'll toy around with it a bit more. Bloody oath it benefits. It's a new car to me now. I thought it gained a bit of up and go when the exhaust was fitted, but this now took it to a whole new level. As I said, why I didn't do this earlier...
Now onto the EGR and Catch can.

[mudski]

I reckon you will find the boost will settle a little more once the egr is blocked.

[Hodge]

Dropped the EGR block in tonight before leaving work. On my way home the car stalled 6-7 times while idling at traffic lights. Starts back up fine. No engine lights or anything.
Driving-wise I noticed it spools up quicker, almost too quick. Might have to back off the needle a tad to compensate. As to why it stalls, I don't know. Too sleep deprived to think or care now. Just glad I got home so I can have a beer and KO on the couch.

[mudski]

Yer thats odd. Very odd. Never heard of stalling. If the stalling issue remains I have the same plate with the hole in it bud. Your welcome to chuck one in and try that.

[Hodge]

Well good news.
Driving to work this morning , it didn't do it once. But that was very odd.