Hi,

i'm using an AEM thru boost.
Now i want to switch to ecu boost control because of gear based control. (FWD)

But i have a 2g dsm with evo 8 ecu and none of the stock boost control hardware everybody is talking about here I wasn't a turbo car, but think about an evo without a stock boost control. I can transfer it to my 1G/2G/Evo3/6/7/8/VR4-Hybrid.
I don't have access to an evo so i can't reproduce, test or compare whats written here.

I have read lots about "pills". Whats that for? Do I need this too?

Solenoid? Keep the AEM or buy a better one?
Can someone describe the stock boost system?
And make a suggestion what i should do/buy?

I would like to be very flexible with my boost settings, winter, rain, summer heat.
Lets say from 10psi stock up to what ever the turbo lets me, just ny flashing, if its possible (i'm not sure).

maybe its as simple as connecting bcs to ecu, some vacume line and setup you desired boost level.

you see i very confused from reading the whole night about boost stuff.

thx Jan

 

get a 3port bcs

wire it up to the ecu

hook up the vacuum lines to the turbo/wg/intake

tune

done

 

that simple? whats about the "pill" stuff?

 

A pill isn't necessary with a 3port, only if your trying to achieve more boost out of the stock solenoid.

 

As you go down in pill size you increase the range of adjustment, but you also decrease the response time. So generally you should only need to add a pill to the pressure feed line, and only then if you cannot get enough boost at full duty.

 

dont need a pill if your using a 3port..

 

You still can need it depending on the turbo, wastegate spring pressure, hose diameters and lengths, internal or external wastegate, and the desired boost. I've only setup a few hundred of them over the years

 

so, i try first without the pill, if i can't get high enough boost levels, i try the first pill?

 

I've installed over a hundred 3 ports as well and never once used a restrictor pill and have had no issues, from stock turbos on 91 octane to HTA35R's on E85.

What condition are you seeing a need for a restrictor pill in a 3 port solenoid?

-Bryan

 

I've been running the AEM truboost solenoid (similar or same as a MAC solenoid) for 2yrs without issue. Works fine. I use a single 1w10 ohm resistor inline.

 

Yes. You should not need it but it is possible that you could depending on your setup and your requirements.

Situations where you will need a restrictor are where you have too soft a wastegate spring and you need to turn up the boost to crazy levels. You see it with customers that insist on wanting to be able to run huge amount of boost adjustment where they should really have changed WG springs to make it run properly.

 

Crazy levels meaning? 30+? 35+?

 

I kinda like the idea of using a restrictor pill at the WGA to provide a bit of damping to the pressure variations. Seems the key is not use such a small restrictor as to induce boost overshoot during spool.

 

I decided to go with the aem bcs.
It has 12 ohm, now i need a resistor in series.

can it be caculated like the fuel injectors (2-3 ohm injector + ~12ohm resistor pack = 14-15 ohm) resistor pack?

I think it has the same power driver like the injectors since its on the injector pin of cylinder 5 or 6 of an v6 engine ecu.

can some one confirm this?

 

Did you see my bench testing of some BCSs? If you can get a GM solenoid, its the best of the bunch. Prodrive solenoid is #2. The AEM MAC solenoid that I tested is #3.

Its not so much of a driver in the ECU as it is a relay to ground. I think its a transitor relay.