Boost controller

[87TIGN]

Ok so I have a PTE60 turbo and alky control on my 87. I just recently installed RJC's boost controller on my car by placing it between the compressor housing and wastegate fittings with some tubing. I took the lines off of the stock controller and left it sitting on the valve cover still plugged into the harness. So to my understanding the stock controller is how the computer sees the amount of boost coming from the turbo at all times. So with this controller unplugged and just sitting there (how I was told to install the new controller) how does the computer see how much boost is being made in order to relay this message to the PAC controller to progressively add methanol when it is needed?
Thanks in advance
-Andrew

 

["Turbo-T"]

Andrew,

On the Alkycontrol kits, it takes a volt reading from the green wire on the MAP sensor on the side of the pass inner fender to tell the PAC to turn on and adjust the power going to the pump. As long as your MAP sensor has a boost/vacuum line attached between it and the intake plenum you should be fine.

I just did install my Alkycontrol kit.

 

[JST A 6]

Ok so I have a PTE60 turbo and alky control on my 87. I just recently installed RJC's boost controller on my car by placing it between the compressor housing and wastegate fittings with some tubing. I took the lines off of the stock controller and left it sitting on the valve cover still plugged into the harness. So to my understanding the stock controller is how the computer sees the amount of boost coming from the turbo at all times. So with this controller unplugged and just sitting there (how I was told to install the new controller) how does the computer see how much boost is being made in order to relay this message to the PAC controller to progressively add methanol when it is needed?
Thanks in advance
-Andrew

That thing sitting on the valve cover is simply a solenoid valve (hence the common name for it--"wastegate solenoid")...it doesn't sense anything. The only thing the computer senses in relation to it is whether or not it is plugged in, so the check engine light will come on if you unplug it.

 

[87TIGN]

Awesome thanks guys I appreciate it!
-Andrew

 

[JST A 6]

No problem.

 

["Turbo-T"]

That thing sitting on the valve cover is simply a solenoid valve (hence the common name for it--"wastegate solenoid")...it doesn't sense anything. The only thing the computer senses in relation to it is whether or not it is plugged in, so the check engine light will come on if you unplug it.

Unless of course if you have a Turbo Tweak chip set up to disable it.

I just did remove mine, no codes are thrown.

 

[bmackinnon]

So to my understanding the stock controller is how the computer sees the amount of boost coming from the turbo at all times.
-Andrew

The ecm receives NO boost input from any sensor, and therefore, has no idea what the boost level is at any given time.

 

["Turbo-T"]

I'm still trying to learn what the stock wastegate solenoid was for.

 

[JST A 6]

I'm still trying to learn what the stock wastegate solenoid was for.

Its sole purpose is so the computer can control your boost while having absolutely no idea what it is...

 

[TUFFGN]

Be careful how you adjust the boost controller. I over adjusted, spanked a new Viper and blew a head gasket.

 

["Turbo-T"]

Its sole purpose is so the computer can control your boost while having absolutely no idea what it is...

Lol that doesn't make sense.

 

[fc227]

The ECM, sends a PWM pulse to the wastegate solenoid to determine boost. BUT the ECM does not know what boost is being run.

 

[bmackinnon]

At a predetermined MAF number, the ECM 'assumes' the engine is under boost, and then pulses the wastegate solenoid on a programmed algorithm based on 'I think' maf vs. tps table. PE or power enrichment mode also figures into the equation and is also based on the same table (I think).