Country Boy

iTrader: (24)

Taking a reference from the compressor side will not yeild a true reading as there is a pressure drop in the system, especially if there is a big FMIC. Taking it from the intake behind the TB will yeild a true boost reading that the motor is seeing.

Mine works perfectly....

stevieturbo

Who is taking readings from it ????

Nobody. Its a boost control system, not a boost guage !!!

Every car manufacturer on the planet takes theirs from the compressor cover, or very close to it. Ive worked on hundreds of turbocharged cars, all of them with the boost control source taken from the compressor.
I did try a few times from other locations, but as there was no beneift in doing so, and in a few cases a detrimental effect, I stick with what works.

The simple fact you are adding a pneumatic boost controller, regardless of its type, means you are fooling the w/g into seeing a different ( lower ) operating pressure than the compressor, intake, TB whereever.
This is how you fool it into giving making more boost !!!

So what exactly is a true boost reading at the wastegate ???

ddnspider

iTrader: (26)

what the heck do you do if the boost controller only has 1 port on it????the turbonetics diagram shows 2 ports

stevieturbo

post pics....

you may have to tee it, as opposed to fitting it inline.

ddnspider

iTrader: (26)

http://www.turbosmart.com.au/index.p...download&id=17
looks just like in the pic accept i have a Tial external 44mm WG.

stevieturbo

As I said, you just tee it as shown. there may not be an obvious vent pipe, or orifice, but there will be one.

get a pump and blow into it and see.

Also, be aware that that diagram shows connection for an internally wastegated car.
Plumbing can vary slightly for an external wastegate.

The same connections for an external w/g would be using the bottom port of the external w/g only, where blowing boost into the w/g opens it, and reduces boost setting.
For an internal w/g, you blow into the top of it, to open it and reduce boost.

ddnspider

iTrader: (26)

ok i just went out and tried it.Boost controller is T'd to the compressor inlet fitting and the bottom port on the WG.top port is open.too much boost.Then i tried using the top port to a source b4 the TB as shown in the Tial manual and overboosting.......W.....T.....F

stevieturbo

Is this with the controller open or closed ???

If its in the closed position, NO air should be able to flow through it, and it will do nothing.

Have you tried it to see which way is indeed low/closed ???

ddnspider

iTrader: (26)

i tried flipping the switch both ways and both overboosted.

stevieturbo

So there is only a switch, no form of adjustment ???????

Surely there is a means of adjustment ?? If there isnt, its scrap.

Have you tried blowing into it ?

ddnspider

iTrader: (26)

oh oh i gotcha...this is with both ***** fully counterclockwise,ie closed so it should run off the WG spring which is 7 psi.im about ready to buy this and call it a day
http://cgi.ebay.com/ebaymotors/BLUE-...68682276QQrdZ1

stevieturbo

That one has 2 ports ??? and only 1 ****

you should only be blowing a boost signal into the one with the arrow.

The other should be vented to atmos.

ddnspider

iTrader: (26)

on mine it says that the special T fitting the arrow should face the WG.which it is.It has 2 ***** and a switch since its a dual stage controller.Ive tried hooking it up many many different ways.
http://cgi.ebay.com/ebaymotors/Voodo...hippingPayment
this 1 has a safety feature that if the **** falls off boost drops.should i just sell the controller i have and pick up 1 of those for $15?

stevieturbo

ok....

in its simplest form, all a MBC is, is an air leak, to show the w/g a lower pressure than expected so it opens later, and hence gives the engine more boost.

For free ?? install a small section of hard tube in the line from compressor to w/g, and start drilling very small holes in it to let air out.

Its a slow process, but otherwise free.

Other very cheap options are...fish tank bleed valves.

Basically anything you can fit, that will let a controlled amount of air out of the line will work to increase boost.

Most aftermarket MBC, add a blocking device, to assist spool time. Basically until say 5psi, NO air gets into the w/g so it doesnt start cracking open earlier than needed.

Too much block, and you can get an overboost situation briefly, and unstable boost control.

ddnspider

iTrader: (26)

i understand how a MBC works,im just trying to get MINE to work,lol.I had an Eboost2,that wouldnt let me keep steady boost or make more than a certain psi no matter what i did.so i bought this instead,thought the dual stage feature would be nice,tried hooking it up a million different ways.it was so simple when i just ran off the WG spring.i have a 13psi spring sitting in my room ive been tempted to just say whatever and throw it on there,but i know theres a small advantage in spool time and no WG creep with a controller.i just bought that voodoo controller so it doesnt get any simpler than that.i think the turbosmart dual stage controller works just cant set it up right i guess.funny that the dual stage boost controller and the eboost2 are both turbosmart products.