ChrisG

Hi All,

Is there anyone reasonably close to Dundee/Perth who would be willing to help me install a Dawes device?

I believe the Dawes fitting is fairly straight forward but the problem is I don't have an AFR meter as yet. Therefore I need the assistance of someone with an AFR meter to help me set it up!!!

Thanks,
Chris

PS Once installed and set up do I constantly need an AFR meter?

Dave Brown

Chris

From memory your car can only run standard boost (no link,chip etc.) so dont worry, theres plenty fuelling available up to the cut point.

I'd be happy to fit it on for you & set it up.Then run with the select monitor on to check all is well.

Just gimme a bell m8
Dave

Sam Elassar

hi chris if you want i can also give you a hand. it only take 5-10 mins to set up really

sam

teknopete

Yeah Chris,

They`re a piece of cake 2 set up, Sam did 1 on mine last night (in the rain & in the dark) in a matter of mins 1nce we found the hoses. Results? No saying

Pete

ChrisG

Got the Dawes yesterday, along with spending about an hour last night trawling thru old posts I'm pertty sure I can fit it myself but thanks for the offers anyway.

My only concern now is running lean on part throttle. Hopefully AWD's select monitor will put my mind at ease during setting up of the Dawes.

Pete......why you no say re. your results???? At least give us a wee bit of a clue, good, bad or indifferent!

Sam.......Any chance of meeting up at my Dad's workshop sometime to let me see the Evo?

Chris

john banks

Chris if you want to come to Dunfermline this afternoon I can help you fit it and set it up for the correct part throttle behaviour - I have all the right drills to sort it out for you. You already have a boost gauge fitted I take it?

Call me 07718 785717 if you want.


[Edited by john banks - 2/9/2002 12:15:57 PM]

Sam Elassar

hi chris

how about this afternoon. i am oncall and seeing a patient around 2:00pm is that ok you.

sam

john banks

Lots of offers Sam I suggest enlarging to a 1.5 to 2mm bleed hole if Chris has a TD04L - otherwise there is too much boost on part throttle and it does actually run lean - you can have 15 PSI at half throttle and only about 5-6% CO which richens to 8% CO at WOT, but the bleed completely solves the problem.

[Edited by john banks - 2/9/2002 1:44:17 PM]

Sam Elassar

hi john

i have done that on my car using the new Dawe that i got. racing boost controller, which is the biggest rip off ever. it is exactly the same as the other one i have but with a lighter alloy ball.!!

saying that the boost rises alot quicker with it than before and there less overboost in 5th now. also it is holding the same boost in all the gears, very very good for what it is really.


no boost fluctuations at all, as i used to have them before if you remember correctly. and also it is holding the boost better at the top end.


no bleed valve, now. enlarged the hole a little bit, abusing my work instruments


sam

john banks

I thought it would not be worth the extra for the racing version. The boost fluctations and less overboost in 5th I can understand being a benefit of the "racing" controller, but why faster spool up? Can't make sense of that since the thing is firmly shut until near boost, unless you are using less bleed now or is there another factor I am not thinking of? Or have you been on the nitrous again whilst abusing work tools

ChrisG

John/Sam,

Thanks for the offers guys.

Fitted the Dawes today with no problems, set it up with the help of Dave Brown and his select monitor (Cheers Dave).

I drilled out the bleed to 1.5mm before installation. Boost is very much controlled with no spike on spool up. Dave confirmed all was well at full throttle, set up holding just under 1 bar. (MY00 AE802 ecu, TD04 turbo). Took Daves advice and have hopefully left plenty safety margin.

Still not too sure about mixture on part throttle as John mentions. I guess an AFR meter would be beneficial for peace of mind if nothing else.

Overall quite happy with my £30 expenditure Only problem on the way home was brake fade!

Oh aye, when is the next Star day?????????

john banks

Part throttle will be fine as you have it - wouldn't worry about AFR meter to be honest if it has been OK on Select Monitor.

Sam Elassar

1 bar ? is not that what they hold as standard ?

sam

The_Gza_on_his_donkey

Chris - woz u the chap with the DBM at AWD this afternoon?

john banks

0.9 bar is about standard for held boost. I would put it up to 1.1 bar (16 PSI), or better still LIFT the fuel cut to 19PSI and run it at 1.25 bar (18 PSI), latter subject to checking all is safe with fuelling which it should be.

Scoty

Hello peeps,

What size of drill bit did you use to enlarge the hole. Is it worth doing, as the cars behaving quite well at 16psi+ in fith gear.

Scoty

john banks

He said 1.5mm above. If you have a MY98 onwards I strongly advise a bleed hole for engine safety on part throttle.

Scoty

Thanks John

Will give it a go today.

Scoty

john banks

You will need to adjust the Dawes afterwards to compensate - ie unscrew it (lengthen it) say about one turn.

john banks

Yes if it holds the right boost no problem.

ChrisG

Guys,

My in car boost gauge is showing about 16-17psi after Dawes install (was showing 14.5psi held before), it was Dave's select monitor that showed 0.9 bar during set up.

Not sure where I stand now as I've lost faith in what my own boost gauge is showing.

Any advice appreciated!!!

John, you mention lifting fuel cut, is that possible without prodrive ECU/Superchip etc?

Chris

The_Gza_on_his_donkey - that was me with the MY00 DBM on Saturday afternoon, what were you in?

john banks

The Select Monitor measures in mmHg where 760mmHg = 1 bar. Perhaps Dave's conversions were approximate - it took a bit of working out and he thought my boost was lower than it was until we bashed the numbers a bit. I know my particular boost gauge under-reads by 1 PSI by comparing it with a calibrated gauge, a Select Monitor and a digital voltmeter. Unofficially, I would find where fuel cut is on your gauge just once on a straight bit of road (!) and run at least 1 PSI below that. By lifting your fuel cut you will not increase peak power, but may increase the torque peak a bit. You need an electronic gizmo which lifts fuel cut to do this even remotely safely IMHO, and I would steer clear at this point.

Scoty

Lo John,

Nearly set up now, the only thing, I had to unscrew it about three complete turns to get back to the same settings. Does this sound OK?

Scoty

[Edited by Scoty - 2/10/2002 1:18:33 PM]

paul w

John,
Been reading through some old dawes threads,you say about drilling the hole out to 1.5-2mm for safety on part throttle,drilling out the hole surely acts as a bigger bleed and more boost.Why does a larger hole stabalise boost?i'm a bit confused ,i've just refitted my mbc and any info would be apprieciated,would a bleed before the mbc be better as mbc will stay closed longer or would this result in too high boost on part throttle.

Cheers Paul

john banks

You need to unscrew the Dawes slightly to compensate for the bleed. The bleed makes it a hybrid MBC. This makes it go for your target boost less aggressively on part throttle. Otherwise a small turbo will achieve full boost on really minimal throttle openings which isn't good for the turbo or the engine. I would say 1.5mm is about right these days.

ricco

I've been reading up on Dawes lately as well as I've just bought one and an AFR. It's really kind of difficult to pick out the bits that are worth reading

I read somewhere that someone had recaliberated their AFR?? Is this possible? I've just bought a 2nd hand one so am now worried that it might not read correctly when i rig it up is there anyway you can tell?

Also, the bleed hole is at 1mm at the mo, do i need to increase this to 1.5mm?? Car is a MY97 running 0.8bar held.

Sorry for all the questions but some of us scaredy people need advice before tinkering with their pride and joy

john banks

1 mm is OK.

If you are familiar with electronics then this datasheet http://www.national.com/pf/LM/LM3914.html will tell you what you need to know to adjust the AFR so that you have a display of what you want - 870mV and above is what I would want to see on full load. If this means nothing to you sorry, but it is the only way to do it.

ricco

You're right John, it means nothing to me I take it then that it can be adjusted...

I'll ask the guy I bought it of if he adjusted it previously first...

Cheers,
Richard.

john banks

If he bought it from JW racing setup for a Scooby like most of them then the green or the blue light showing on full boost is reassuring.

ricco

He said it was bought from JWRacing about two months ago... I've asked about that anyway.

Cheers John.