DAWES DEVICE BOOST CONTROL GROUP BUY??
22 October 2001, 10:34 PM
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There seems to be a lot of interest about these. And a problem with the payment method. How about seeing if we could get a group discount. I have a friend coming over from the states who could bring 10-15 pieces if enough interest.
23 October 2001, 07:17 AM
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I have E-mailed them to ask how much they would be prepared to let me have 10-15 units. Either shipped direct or to be brought over by a friend from the States just before Christmas.
Maybe there wont be a great saving.,But the waiting time will be a lot quicker.
The only other cost will be for Recorded delivery to you from me.
Will keep you posted ,when Dawes Devices reply
Luke
Maybe there wont be a great saving.,But the waiting time will be a lot quicker.
The only other cost will be for Recorded delivery to you from me.
Will keep you posted ,when Dawes Devices reply
Luke
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23 October 2001, 12:25 PM
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Luke,
Sounds a fine idea - PayPal is best described as "awkward"
US$35 is about £25...
Anyhow, as I already have one of these, a couple of links for you:
Details as above:
http://www.dawesdevices.com/boost.html
Instructions:
http://www.dawesdevices.com/SDinstructions.html
Remember common sense and care is mandatory if you fit one of these - please leave the fuel cut alone. Otherwise, Santa will probably be bringing you a new engine on his sleigh along with a BIG bill....
Enjoy
Thanks
Gavin
[Edited by GavinP - 10/23/2001 12:37:25 PM]
Sounds a fine idea - PayPal is best described as "awkward"
US$35 is about £25...
Anyhow, as I already have one of these, a couple of links for you:
Details as above:
http://www.dawesdevices.com/boost.html
Instructions:
http://www.dawesdevices.com/SDinstructions.html
Remember common sense and care is mandatory if you fit one of these - please leave the fuel cut alone. Otherwise, Santa will probably be bringing you a new engine on his sleigh along with a BIG bill....
Enjoy
Thanks
Gavin
[Edited by GavinP - 10/23/2001 12:37:25 PM]
23 October 2001, 02:22 PM
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Dingy,
Have you read any of the details about this ?
The whole point is that it is NOT a bleed valve.....
It is a "ball and spring" valve - http://www.xmission.com/~dempsey/perform/grainger.htm
Thanks
Gavin
[Edited by GavinP - 10/23/2001 2:40:31 PM]
Have you read any of the details about this ?
The whole point is that it is NOT a bleed valve.....
It is a "ball and spring" valve - http://www.xmission.com/~dempsey/perform/grainger.htm
Thanks
Gavin
[Edited by GavinP - 10/23/2001 2:40:31 PM]
23 October 2001, 02:26 PM
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Hi
I would also be interested in one of these, is it just a case of fitting and setting to required boost and nothing else? ie. fueling etc
Ian
[Edited by Maxy - 10/23/2001 3:15:47 PM]
I would also be interested in one of these, is it just a case of fitting and setting to required boost and nothing else? ie. fueling etc
Ian
[Edited by Maxy - 10/23/2001 3:15:47 PM]
23 October 2001, 08:12 PM
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I have just received a reply from "DD" .They have offered a discount. Also he was interested in the "Chat" about his products on the "Scoobynet"
Once I have worked out how much it will cost including Registered post out to you,I will let you all know.
Luke
If we get over 15 orders he can let us have more discount.
Once I have worked out how much it will cost including Registered post out to you,I will let you all know.
Luke
If we get over 15 orders he can let us have more discount.
23 October 2001, 10:33 PM
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I've just read the link, it looks like a bleed valve to me.
How do you adjust the fuelling now that the ECU's map is useless (as it doesn't know how much boost is now being produced).
I thought the reason Link / Motec / Jems etc + the mapping cost so much is because it's not that simple ...
How do you adjust the fuelling now that the ECU's map is useless (as it doesn't know how much boost is now being produced).
I thought the reason Link / Motec / Jems etc + the mapping cost so much is because it's not that simple ...
23 October 2001, 10:41 PM
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Ok, I've read the website, was never too keen on bleed valves but this device seems ok!!.
A question to you Gavin, being what seems the only person who has one fitted. Would this cure an overboost problem???. What I'm trying to ask is can it be turned down to reduce boost, or will the factory setting and it's ability to delay the signals etc overcome overboost.
May be interested if this helps my overboost.
Arrh go on then I'll have one, could not resist the temptation.
Muddy.
[Edited by muddy - 10/29/2001 11:48:00 PM]
A question to you Gavin, being what seems the only person who has one fitted. Would this cure an overboost problem???. What I'm trying to ask is can it be turned down to reduce boost, or will the factory setting and it's ability to delay the signals etc overcome overboost.
May be interested if this helps my overboost.
Arrh go on then I'll have one, could not resist the temptation.
Muddy.
[Edited by muddy - 10/29/2001 11:48:00 PM]
24 October 2001, 06:54 AM
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Correct me if I'm wrong (I have been b4 ), but isn't the whole idea of this valve to prevent wastegate creep?
It doesn't take any control away from the ECU (if set-up correctly!) - you set the valve to start passing air before the nominal .7 bar that the wastegate is normally fully open at. It's fitted after the T-piece leading to the control solenoid, in-line with the wastegate.
In this manner it stops the wastegate opening partially until the valve reaches it's preset. Hey presto - faster rising boost
Of course, you could set the valve to open at, say, 1 bar - the car will go bang or hit fuel cut though..... Equally, I guess *any* bleed valve can be used in the same manner - just depends where you fit it.
Or is that pants?
Richard
), but isn't the whole idea of this valve to prevent wastegate creep?It doesn't take any control away from the ECU (if set-up correctly!) - you set the valve to start passing air before the nominal .7 bar that the wastegate is normally fully open at. It's fitted after the T-piece leading to the control solenoid, in-line with the wastegate.
In this manner it stops the wastegate opening partially until the valve reaches it's preset. Hey presto - faster rising boost
Of course, you could set the valve to open at, say, 1 bar - the car will go bang or hit fuel cut though..... Equally, I guess *any* bleed valve can be used in the same manner - just depends where you fit it.
Or is that pants?
Richard
24 October 2001, 11:40 AM
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A few points....
Dingy - LOL...
Gary - The ECU can see the level of boost perfectly well using the MAP sensor. If you do not disable the fuel cut, the ECU will use it's map to determine the correct ignition and fuelling. Depending on how you use the MBC, you can disable ECU control of the boost which is not the same thing. If you fit an electronic boost controller, you would be in the same situation....
Muddy - from experimenting with a bleed valve and the Dawes MBC, the bleed valve did overboost in higher gears and varied a lot more depending on the weather. With the Dawes the maximum deviation I have seen is 0.5psi. This could help.
Dowser - you are correct about the main benefit is reducing wastegate creep and that you can also use it to raise or reduce boost levels as well. The advantage of the Dawes over a bleed valve for raising boost is stability.
I would recommend that anyone who does participate in Luke's group buy sets the boost level at stock levels (at least initially ) and then goes for a drive. On early cars at least, the difference is NOT subtle and car is much faster A to B....
Another thing worth stressing as well is to make sure that all connections are clamped using hose clips or cable ties to ensure that they stay put.
Thanks
Gavin
Dingy - LOL...
Gary - The ECU can see the level of boost perfectly well using the MAP sensor. If you do not disable the fuel cut, the ECU will use it's map to determine the correct ignition and fuelling. Depending on how you use the MBC, you can disable ECU control of the boost which is not the same thing. If you fit an electronic boost controller, you would be in the same situation....
Muddy - from experimenting with a bleed valve and the Dawes MBC, the bleed valve did overboost in higher gears and varied a lot more depending on the weather. With the Dawes the maximum deviation I have seen is 0.5psi. This could help.
Dowser - you are correct about the main benefit is reducing wastegate creep and that you can also use it to raise or reduce boost levels as well. The advantage of the Dawes over a bleed valve for raising boost is stability.
I would recommend that anyone who does participate in Luke's group buy sets the boost level at stock levels (at least initially
) and then goes for a drive. On early cars at least, the difference is NOT subtle and car is much faster A to B....Another thing worth stressing as well is to make sure that all connections are clamped using hose clips or cable ties to ensure that they stay put.
Thanks
Gavin
24 October 2001, 10:32 PM
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Can only see removing the dodgy OEM boost control system is beneficial on my car anyway. I am hoping this system would remove the peaks, and then I'll be able to run 1.2 bar peak/held. At the moment I get anything from 1.2 to 1.3 peak and then it holds somewhere between 1.15 and 1.2. It's crap and no matter how much I adjust the restrictor, it is variable on the conditions, sometimes being slow and not reaching a good held, and other times overshooting crazily - with clean piping too!
Question - when the ECU backs off the boost when it has gone a BIT high does it cut the fuel or does it change the pulsation of the solenoid that controls the recirculate pipe off the T-piece? What I am wondering is will this system still work with the MBC in situ - I presume this would be the case if it cuts the fuel but there is a danger of running temporarily lean. I don't mean the brick wall overboost complete cut out, but overshoot and then fluctuating boost control if the peak goes too high as Dowser and I have discussed before. I presume the ECU is controlling this in some way....
For a PPP with DP I am wondering about setting things at 1.2 bar peak/held with MBC. What are others planning?
[Edited by john banks - 10/24/2001 10:43:27 PM]
Question - when the ECU backs off the boost when it has gone a BIT high does it cut the fuel or does it change the pulsation of the solenoid that controls the recirculate pipe off the T-piece? What I am wondering is will this system still work with the MBC in situ - I presume this would be the case if it cuts the fuel but there is a danger of running temporarily lean. I don't mean the brick wall overboost complete cut out, but overshoot and then fluctuating boost control if the peak goes too high as Dowser and I have discussed before. I presume the ECU is controlling this in some way....
For a PPP with DP I am wondering about setting things at 1.2 bar peak/held with MBC. What are others planning?
[Edited by john banks - 10/24/2001 10:43:27 PM]
