Dawes Valve

[nickpeacock36]

Ok I would be screwing the dawes valve in a couple of turns and trying that, sounds like dawes is open to far

Spot on again mate. Much better this time after stopping to adjust more and more but still only getting upto 12PSI max 6 - 8 cruising at 100KPH Do you think i need to adjust the turbo? i wound it in after blocking the EGR. Maybe i went too far. What do you think

[big_fletch]

I would go in a little more with the dawes valve and see what happens then, if boost won't go any higher then I would wind the turbo screw back a little

[YNOT]

Adjusting the dawes is easier so I would adjust that a bit more first and see what effect that has. How fast is the boost coming up/spooling?

Tony

[nickpeacock36]

Adjusting the dawes is easier so I would adjust that a bit more first and see what effect that has. How fast is the boost coming up/spooling?

Tony

I have adjusted the Dawes quite a lot tony. Boost is quite quick if i stick the right boot down, not as quick as it used to be though.

[nickpeacock36]

I would go in a little more with the dawes valve and see what happens then, if boost won't go any higher then I would wind the turbo screw back a little

Ok mate, as i said to tony, i have already gone quite alot but will try again in the AM

[YNOT]

It is starting to sound like you may need to readjust the VNT grub screw to get full boost. If you do readjust the grub screw back to where it was and still can not get full boost the next step is to carefully open up the dawes valve and stretch the spring a bit.

Tony

[big_fletch]

I agree with Tony, sounds like the grub screw you moved after blocking the egr needs to be screwed out again..
Then should be able to get your max boost set properly

[nickpeacock36]

Adjusted the turbo and the Dawes. It now boosts to 14-15 and sits aroud 6-8 at 100. If climbing it will stay around 14 Temps are good highest was 450 while climbing (steep hill too )
Does that sound ok or would it be better to stretch the spring (as Tony suggested)to get it to boost higher?

[YNOT]

Did you adjust the grub screw back to its original position?
I'd be trying to get boost to 16-17.

Tony

[nickpeacock36]

Did you adjust the grub screw back to its original position?
I'd be trying to get boost to 16-17.

Tony

I stuffed up when i adjusted it, i thought it had a yellow line on it, but it turns out it is thread lock so i wasnt sure how much i turned it. i turned it 360 this morning and screwed the dawes as small as it can go.