Turbonetics boost controller plumbing

[JST A 6]

I just installed a new downpipe with an external wastegate and a Turbonetics boost controller (nothing fancy; basically just a 0-50 psi air pressure regulator). In the instruction sheet that came with the controller it says to go downstream of the throttle assembly for the boost connection, which to me would mean tapping into one of the lines coming from the vacuum block since this would be behind the throttle blade. However, I've seen pictures where it looked like people have just used the barbed fitting on the compressor housing as their boost source--if this is OK I'd rather do it that way since the fitting is there not being used for anything else...I was just wondering what other people's thoughts on this were? Is there any reason I shouldn't run it straight from the compressor housing?

 

[JayC]

You can use that as the boost source.. no problems

 

[JST A 6]

You can use that as the boost source.. no problems

Thanks! I thought it would be OK; as a matter of fact I already have it plumbed that way but I wanted to make sure there would be no regrets later...

 

[nuclearxp]

I think their reasoning for that is getting boost from behind the throttle body plate will generally keep your turbo spooling longer. When it snaps shut you don't have much pressure, which in turn keeps the wastegate closed harder.

If you're using the compressor housing as soon as the throttle plate closes there is still leftover pressure in the intake pipes putting more pressure on the wastegate slowing the turbo down more.

Correct me if I'm wrong, that's just my $.02

 

[JST A 6]

Got another question on this same topic--I tucked my boost controller down behind the charcoal canister, mounted to what would be the battery tiedown bracket (some Regals had the battery on the driver's side) since this seemed like a good location due to the fact that it's out of the way and there was plenty of room for it. The lines are neatly run across the engine compartment with wire ties holding them to the A/C suction line (the low pressure side of the system; the larger of the two lines). I was wondering if anybody else had done anything similar and ran into problems with water vapor condensing inside the boost controller lines since the A/C suction line gets cold when the A/C is running? I didn't think about this until after everything was installed, and I don't want to run into boost control problems because of the boost controller or the wastegate diaphragm being flooded with water...any thoughts?

Thanks...