dawes and needle valve for common rail?

[mudski]

As you have the gauges, block the EGR and monitor how it goes. Its not a big job to remove it if your not happy.

[Lemo79]

Thats me guys. Buy through here and 10% goes back into the forum. Which reminds me i need to transfer some coin across

Hey Mudski, PM sent. This has been on my to do list, and I am about to do a service so now is as good a time as any.

Lemo

[the evil twin]

As you have the gauges, block the EGR and monitor how it goes. Its not a big job to remove it if your not happy.

What mudski said...

[patrol4life]

I have had a dawes and needle setup on mine for about two years now, with no ill effects. The ecu does a good job on an unmodifed car. But with a rail chip with no boost control, the egts can get to high. The dawes is a good way to bring egts down and gain performance when adding more fuel.

[rottodiver]

I had a Dawes and needle valve, took me a bit to install it( a lot of help from here but very very simple once you know how...maybe a 2 minute job once all hoses are cut) I have since removed them( on the side of the road on a trip) I really had troubles Setting them correctly.. They ran well in the city then when towing on the hwy I hit limp mode twice when trying to overtake on a hill. I haven't put them back in because I have had no over boosting problems at all... Although the faster spool up rate was very noticeable. I have the egr blocked with no hole in it , 3 inch exhaust, provent catch can, and chip. Have had the check engine light 3 times only(easy fix with scan guage)

Scotty

[Beni C]

I run a CRD with the EGR block, Provent and Scanguage, no massive spikes in boost, runs well.

Mine has EGR block and no Dawes or Needle valve.
I fitted the EGR then adjusted the VNT as per Chaz's bible and she's been tickety boo ever since (chipped, 3" exhaust, EGR block, pyro and scan gauge)
I bought the Dawes gear but it runs perfectly well on the ECU so never bothered so I sold the bits

Where can I lay my hands on this bible ET??

[threedogs]

@ RD What do you think was the cause of the limp mode,
dawes adjusted correctly should have limited your boost to 15psi max,
with no chance to overboost

[rottodiver]

@ RD What do you think was the cause of the limp mode,
dawes adjusted correctly should have limited your boost to 15psi max,
with no chance to overboost

I was under the impression about 18 psi was ok for crd,s
It can only have been it was set too high, frustrating thing was it worked perfect ( so I thought) around town for a few weeks before the trip. It even triggered the engine light with the over boost code... I guess I am more comfortable with the ecu looking after the boost than me setting it.. If it was to over boost with out the valves I would think about re installing them but I have had absolutely no problems since taking them out..( do miss the faster spool up though... It really does improve with it). As it is I am happy with egt,s , boost, Engine temp and also auto trans temp, even the boost doesn't fluctuate too badly either so will see how they go..
Scotty

[threedogs]

I believe the Cr ECU handles the boost issues a better than the Di.
So you have a dawes set up for sale lol

[rottodiver]

I believe the Cr ECU handles the boost issues a better than the Di.
So you have a dawes set up for sale lol

Nah not for sale... I am not against having another go later... Maybe during simpson when there are some people around me that know what they are doing ( a lot more so that I) it is now plug and play, all hoses are at length etc