dawes device vs. home depot boost controller
 

is it worth it to pay the extra for the dawes device, or is the home depot basically the same thing?

My home depot racing team MBC worked fine!

They are completly different - the "Home Depot" controler is simply a bleader valve that replaces the "PILL" in the stock system. In essence an ADJUSTABLE Pill, the Dawes is an adjustable Spring loaded Valve that opens at a preset level. The Dawes device in essence turns the boost control system in to a mechanical fedback loop system insted of the stock programed duty cycle system.

Tell me more about this dawes device. It sounds like it can operate actuators based on pressure, rather than revs.

Sort of - it holds pressure on the actuator to the preset pressure regardless of the soleniod duty cycle then it opens to alow the WG to open by venting the same as the solenoid does. Remember the WG spring is set to open @7psi and the gate is HELD CLOSED by additional pressure on the actuator taken from the pressure tank (that is pressured by the turbos) that pressure is regulated by bleading air out through the solenoid valve. With the Dawes Device you get to set how much pressure is put on the actuator prior to venting. ie to get 12psi boost you set the DD to 5psi = the 5psi spring = 12psi.

So on the Dawes Device the the WG solenoid is not used?

Seems to me that could work OK for the Wastegate, but probably not very well for the the trubo precontrol. The "binary" operation of the DD seems like it would give pretty funky prespool on the second turbo.

anyone got more info on the dawes device? how does it affect prespool? does it allow for faster spool-up than the hd?

Hi,

First time posting....Take a look at http://www.autospeed.com/C_articles/A_0670/article.html it is a neat boost controller this guy uses on his turbo audi but I guess it will work on a real car too :)
Rob

only thing is...

the instructions tell you to not use the existing wategate sourceline but tap into the turbo manifold or another boost source...yet forum members just install the dawes device where the home depot valve would be same source line and all...

also the nipple on the exit side is smaller than the entry side....6mm hose on the front....4mm on the back? can one purchase an elbow with the correct nipple size? no way you can attach a 6mm to that little elbow

thanks

Go to the website
http://www.dawesdevices.com/
the have a good description of how their device works.

RS My eariler post:

the above line should read:

ie to get 12psi boost you set the DD to 5psi + the 7psi spring = 12psi

Ive been to the website...so you cap the end of the header and connect the inlet to a boost source. I thought the original source vac line to the pill was a boost source?

thanks

best for non-sequential. originally designed for single turbo.

would take a lot to work into sequential use.

For sequential you would probably need to use a regular needle valve - or restriction valve for prespool and the DD for the Wastegate - but you would have to be sure to have a higher WG boost setting than prespool (first turbo) otherwise the DD would open the WG on the first turbo and kill the transition to the second turbo (or that's how it seems inside my head).

I have been running the Dawes valve to control my WG and a bleeder valve to contol my prespool for years. It works great. Quicker spoolup and less spike at transition. I did a writeup on it a while back.
http://65.33.208.101:81/silver7/Boost_Controller.htm

Same setup here. Actually followed Silver7's writeup about 2 yrs. ago. Smooth boost pattern of 12-10-12 with minimal if any spiking. That is kick ass especially since I am running a street port, intake, DP, MP, CB ! Dawes is the shizzy.;)

Thanks, Silver7.