DBDOM

Help!!

I have a MY99 with Induction kit and magnex BB. I Fitted Dawes device tonight and took the boost up to 15PSI, well acoording to my gauge. Prior to the Dawes i was showing 13PSI max and held.
The dawes now makes the car feel really slow, there doesnt seem to be the kick in the back there used to be, although up to 15PSI now.

What have i done wrong. The device is connected between my Turbo Out(throttle Body) and the actuator, wasnt sure what to do with the other pipe that was no dangling so i just looped it back on itself through a T piece. Any ideas anyone??

DBDOM

I just checked the pipes and one was slighlty kinked so i placed a longer bit of pipe there, i am now getting 15PSI peak dropping back to 14 psi in 4th and 5th, and 13 held in 2nd,3rd. But it still feels slow, also you cant feel the turbo kick in until about 3500rpm??

Edited to say, i have hardly turned the Dawes at all, just barley threaded it.

[Edited by DBDOM - 7/19/2002 7:54:35 PM]

mrp

DBDOM

Check this site to see if you have it connected properly. I'd also check that the remaining hoses are properly blanked off. There may be an issue if you are using the hose with the original restrictor stil inside. Sorry I can't give any more advice on a MY99 as mine is a MY96 and the layout of the solenoid is slightly different. Driving wise the dawes made mine spool up slightly earlier and the car feels more responsive low down with a progressive shove as the turbo really kicks in from 3000+


Martin

[http://www.geocities.com/harryboy_scooby/]

dhorwich

what size is the hole that is drilled into the housing of the dawes, it needs to be bigger than 0.5mmm diameter on the newer shaped smaller turbo scooby..

Dan

DBDOM

The hole is 1.3mm its a race version dawes. I checked the diagrams on http://www.dawesdevices.com/SDinstructions.html and it all seems connected ok. I got it second hand, so i know it works ok with a 1.3mm

[Edited by DBDOM - 7/19/2002 7:59:17 PM]

Scotsman

iTrader: (3)

I'm sure Mr Banks will be able to give some insight into this once he's online.

My MY99 held around 14 prior to the Dawes going on and the difference was incredible.

Wish I could actually be of help!

Rich.

[Edited by Scotsman - 7/19/2002 7:59:05 PM]

[Edited by Scotsman - 7/19/2002 8:00:34 PM]

john banks

1.3 or 1.5 are OK. The Dawes on a decat MY99/00 should produce 14 PSI by 2500 RPM in top gear. Perhaps you have a leak somewhere? Did you cap off the line you disconnected that goes to the wastegate solenoid? Just noticed - looped it back on itself through a T-piece - that means there is a third port on the T-piece that will be leaking?

[Edited by john banks - 7/19/2002 8:03:53 PM]

DBDOM

The other pipe is on a T piece and the other ends of the T piece are connected together with one other pipe. So there are no Holes. I just would of expected to notice the diferent, but there is just no feeling of power, full boost 15psi at no less than 3500rpm, Its very weird, The dawes is vertical as recomended and the pipes as short as possible. I must admit it doesnt really seem to make any difference what i do to the dawes it doesnt have that greater effect maybe i do have a leak. Ill go check

DBDOM

OK, Checked for leaks could see any. Check pipes were on properly and adjusted dawes again, 1/2 turn i then got boost coming in low at about 2800rpm and boost was holding in all gears (i think, i was scared ) but its holding at 17PSI (according to gauge)and held 17PSi all the way up a big hill, but then got worried about the 17PSI my gauge was showing. Promptly turned it back down 1/2 turn

[Edited by DBDOM - 7/19/2002 8:50:52 PM]

DBDOM

Given up for the night. Try again in the morning

Katana

Are you sure its not psychological? Try to time your 0-100 and see if its slower or faster..

DBDOM

Definately not Psychological, unless maybe i expect too much. I dont have a decat system just the backbox, so maybe that would explain the rev's being higher. O well ive set it back to completely open now, try again on Saturday

Just a quick note, generally speaking on average would the Dawes be practically open or closed if trying to set for 15PSI . mine is practically falling apart in the middle

[Edited by DBDOM - 7/19/2002 11:44:13 PM]

Katana

Wait, revs going higher than normal? I think you;ve got a clutch problem..

dhorwich

It should be nearly closed i.e screwed all the way in to get 15psi...

"practically falling apart in the middle" what do you mean...???

Dan

mutant_matt

Well when I had mine setup for about 15psi it was almost screwed out completely (I think this is what you mean by almost falling apart in the middle?) so I shortened the spring so I could screw it down a bit more.

I had an MY00 with just a BB and I got full boost (15psi) by about 2700rpm (and my bleed gole was drilled to 2mm).

Matt

dhorwich

I must be thinking of my car which is the older larger turbo scoob MY95 wrx..... to increase the boost you screw the dawes 'in' and increase the tension on the spring....

Must be different on the new sccobs due to the larger bleed hole..

Dan

dhorwich

Hi,

I also read that if you screw the dawes 'out' to far it make the boost control more like a bleed valve and lessens the benifits of the relief valve.... because with the valve screwed all the way out nearly the ball will ratttle around inside the dawes and not seat properly... i think..!

You can also take the spring out and stretch it a little to increase the tension... but be careful not to do it too much.

This could be your problem...

Dan

DBDOM

Yeah, it could be the problem, when i said almost in half i meant it was practically undone completely, i screwed it down more but boost was going towards a rather scary PSI so i let off before it got higher. I had another play this morning, in Fourth starting at 1500RPM, if i floor it i hit 16PSI by 3000RPM then it drops and holds at 15PSI, does this sound right, but there still seems less oommmpphhh in 2nd gear.

Anyone got the link to a discussion about having dawes too slack? Should i cut the spring or try and stretch it??

[Edited by DBDOM - 7/20/2002 1:02:43 PM]

mutant_matt

Sounds to me like if you were to stretch the spring you will have even higher boost and no adjustment to bring it down. IMHO, I think that shortening the spring (by cutting) will reduce the boost. You can then screw the device further in to get a more controlable and adjustable setting....

All just IMHO of course

Matt

DBDOM

Wellthanks for all your help. I stretched the spring and yes the boost was heading past 17PSi and that was the only just threaded. I then snipped the spring by 2 rings (if you know what i mean) and i have screwed 2 turns, and can now tell the difference, 3rd gear just pulls quite hard now, so im happy. Cheers,

P.S I drop the bloody spring in the engine and had to take the plastic cover of the underside of the car, what a nightmare, cant get the bleeding thing back on now. God arent cars fun.

jonny gav

iTrader: (1)

it may just feel like its got less go because the boost is coming in earlier so you don't get as much of a kick in the back at the same boost level?

just a thought

DBDOM

If thats the case then, that would explain it. Just one last question. I have readjusted again to play more safe.

2nd Gear no more than 13.5 3rd gear 14PSI then Fourth and Fifth peak to 16PSi and slowly drops down to 15PSI and then frops again at about 6000rpm ish it drops to 13PSI. Does this sound right? The boost is now coming in alot earlier.

subfreak

Just fitted Dawes on my 02Wrx and got the same feeling!!!
But jonny gav is wright, the boost does come in earlier and tends to smooth out the torque!But if you cheque 0-100 without it im sure youll find its working ok?