msallua

Hi

I know the pros and cons of a MBC, and now.. It would please me to know about persons that are using dawes device and since when are using dawes device and if have had problems.

I have it installed a week ago, and I am very happy with the results obtained because now my car is a rocket. Never feel this power in my car.

I need to know because I live very far from Uk, and in my country I don't have information about this product.

Thanks in advance from South America

Best Regards

GT MY99
Ecutek Tek2, SS full exhaust, 17psi max. Boost Gauge , AFR Gauge and Knocklink

StickyMicky

lots of people run them, i fitted mine to cure problems with over boosting and such, it does exactly what it says on the tin

Trebor69

Hello

I fitted a dawes to my MY93 WRX 2 weeks ago and I must say very impressed, Controls boost very well, I run at 1.1 bar.

I was using a HKS EVC4 Pro boost controller before which was playing up.

The only difference I can see between aftermarket electronic controllers is you don'y have in-car control.

I like the way the spring doesn't let any pressure to turbo wastage until target boost is hit, so not opening wastgate at all until target boost is it.

This I think helps to build boost quicker and stronger.

Cheers
Rob White

Cornelius

iTrader: (2)

my car has got one (MY96), I'm a little paranoid about the Dawes device as I dont like the idea of overboosting the car, having said that I'll probably feel better about the thing once I've got a decent boost guage in the car, though I am considering an EBC

StickyMicky

your car should fuel cut before it over boosts

Trebor69

Hello Msallua

What I will say when fitting a Dawes device or any other boost controller really is that you must get a on dash boost gauge so you know what boost you are actually running.

All you have to do to fit this is run a hose from inside car where you mount the gauge and two wires if you want it to light with dash lights at night!

You get a t-joint so you can bridge hose from boost gauge into hose from inlet manifold.

Upping boost on a car is a great way to get more power and torque, but there are other things to take into consideration. You need to know how much boost you are running deffo!!! Also if you run too much boost without making sure it is fueling right at the higher boost you could run into problems with Detonation/knocking which can seriously harm your engine.

I use a dawes device on my car at 1.1 bar, i think standard boost is about 0.8 bar. My standard ECu can handle this but you may need to get a fuel cut defender (this takes the normal fuel cut level a bit higher, Fuel cut is there as a safety device, running too much boost could damage engine so ECU cuts Fuel)

best thing to do is get boost gauge fitted, set dawes to boost level you desire (best talk to local subaru specialist or on here!). Then take car to be rolling roaded, when this is done, they can tell you how much power it is producing, check for knocking from engine and check Air/fuel mixture to see if car is fueling correctly.. Money well spent for peace of mind!!

Anyway think I have gone of on one here

Have fun

Rob

Richard Curtis

I have had one on my car for almost two years now with no problems at all. Its a very simple bit of mechanics with not much to go wrong. Controls the boost perfectly with no overboosting at all with a fast spool up.

If your not going to be tinkering with your boost levels on a regular basis then I don't see much point in paying more for an electronic controller.

As per previous messages, get a boost gauge to check what you're doing.

Rich

msallua

How many psi are you running ?

Richard Curtis

Its set to 18 PSI

Rich

The_Judge

Rob, I think msallua already has boost/AFR/Knocklink (bottom of his original post... )

Msallua, a couple of things to bear in mind...

- I'm guessing your temperatures are a tad higher than ours here in the UK. With that in mind, keep a very close eye on your Knocklink. Compressing air heats it up considerably, and if the intake is already warm before it gets compressed, cylinder temps could be getting too high, a very good reason for det, even though your AFR might read OK. Are you using the standard TMIC...?

- Different turbos can handle different boosts, so what may be suitable for one turbo, might not be for another, creating problems such as surge, excessive blade speed, excessive compression heat, etc.

- Also, the fact you've already had a Tek2 probably means your ignition timing is more aggressively advanced, which mixed with excessive intake temps could also lead to det.

- What fuel you using? What about octane booster? Water injection might be something worth considering...

msallua

Thanks, I keep a very close eye in my Knocklink.
I'm using 97 RON fuel and I'm using the standard TMIC and STI Air Panel.

msallua

MY of your car ? You run 18 psi with OEM engine internals ?

Richard Curtis

Its a UK97, I was running 18PSI for around 18 months with a TD04 turbo.
This was with standard internals, but samco hoses, unichip with fuel cut defender (I think the fuel cut is around 14PSI on a UK97), full decat.

I am now running the same boost (for the last 8 months) with a VF29 turbo and gruppe s headers. The only thing I have uprated internally is the clutch (the oem one only lasted 25K) and have now also fitted a lightened flywheel.

It's run on 97RON fuel with the occasional 95 used in emergencies.

It's now putting out around the same power as a decatted P1 (around 280-300BHP depending on the dyno). The internals should be strong enough for this level of power, its not much more than a standard jap spec wrx (on 100RON).

The_Judge

18psi on 95RON...

That's one way to blow the red bulb on yer Knocklink...

Richard Curtis

What knocklink

It is rare that I use 95RON, usually when on hols in west wales and cant find a garage that sells SUL, I usually take it easy until I refill with the good stuff

Johnny sti

My Dawes device is in the post!
I changed the ecu on my 1993 wrx yesterday to a 1995 wrx RA. What psi should i run my car at?

Mitch C

iTrader: (1)

I've got a Dawes device sat on the side in the kitchen, but don't want to put it on until I get the car mapped for UK fuel. What ECU will fit straight on to my car and also allow me to fit the Dawes? It's a MY 93 WRX.

DreXeL

Up untill a couple of weeks ago I was running a dawes on my UK MY97. I have a full decat, K&N induction kit, and samcos. It has been at 1.2bar for over a year and I've had no problems whatsoever. I have replaced it with a Greddy Profec e-o1 electronic boost controller, and TBH I really miss the kick the dawes gives you. The boost comes in much smoother with the Profec, but I honestly prefered the sudden dollop of boost with the dawes. I'm actually running more boost with the Profec (1.3bar peak), and it holds the boost higher up the rev range, but I really miss the kick of the dawes.

Oh, and my Knocklink never gets past the second green BTW.

Turbo Dave

The best choice would be a soobyecu which raises the boost slightly anyway.
You can always raise it more by getting a fuel cut defender and obviously a knocklink to keep an eye on things.
Thats what ive done on mine and i'm running 17.5 psi without any signs of Det
at all
Best to get a Scoobyecu first though as it sorts out your fuel mapping etc

Mitch C

iTrader: (1)

Thanks mate, the Scooby ECU will be my first engine mod. Are there availability problems, as I'm led to believe they do it in their spare time?

Turbo Dave

They are available but i beleive the waiting list is quite long but it's definately
worth the wait

scunnered

iTrader: (1)

This dawes device is just a bleed control valve right?
I know a guy that uses one in his car to control boost. He bought it for £4.99 from an aquarium shop.
He says it's exactly the same as the dawes, but obviously a lot cheaper.
Is there any difference, or is the dawes suppliers taking everyone for a ride?

DreXeL

No it's not the same as a bleed valve. The Dawes stays shut untill target boost is hit, then opens to bleed the air to control boost. A bleed valve is bleeding the air all the time.

You get much better spool up and boost control with a Dawes, than with a bleed valve.

Mitch C

iTrader: (1)

I'll be glad when they answer my email. Thinking about it, it may only be a day or too. Maybe I'm just a bit impatient

msallua

Hi,

Thank you all

Cheers
From Uruguay, South America
Marcos.