Applied Technologies Waste Gate

[jrobichaud]

I am new to the forum so thankks in advance for the help. I have an 87 GN formally owned by SLOWHAWK. The motor was built by Jack Cotton in 2004 and has about 6K on it since. The wastegate is an external one by Applied Technologies and there is an adjustment screw in the middle of the waste gate and the sticker around it indicated increase is to turn th escrew (allen wrench) clock wise. I was told by JC that is not the way to change the boost and to follow the vacuum line from the turbo and I will find the adjustment. The only thing that vacuum hose is attached to is an electronic piece on the left valve cover (boost gauge unit?). I am currently running between 10 - 13 # and I wanted to increase it to 16#. Any help is appreciated. Thanks!

 

[jrobichaud]

attached is a picture of the engine for reference to the waste gate I am referring to in the original post.

 

[Quick6'n'-K.C.]

I have that ATR gate on my sage green 87 turbo car, You can take the hose that you described that leads to the wastegate solenoid on the valve cover, and install a manual boost gauge. Completely removing it from the wastegate, or putting a small bleeder inline between the external gate and the factory solenoid.

I would highly suggest you take SMALL steps in increasing the boost with a bleeder valve. One small opening will create 2-4 psi of boost.

I currently have the same hosing as you, but mounted the bleeder valve right on the gate so i can easily adjust it.
Havent adjusted that screw in the middle for 3 years.

BW

 

[jrobichaud]

Bryan, I appreciate the quick response thought I didn't follow your instruction. Do you have any picutes of your set up or feel free to call 617.877.7270 or email me off line jrobichaud@collaborative.com. Being new to turbobuick.com, I look forward to the same level of responsiveness and help! Maybe someday I can return the favor.

 

[3.8vsix]

This way works also. just buy a air compressor regulator, like at sears and hook it up this way.

 

[Quick6'n'-K.C.]

I didnt see you had posted, does your wastegate have 1 or 2 ports on it?

Id have to fire up my old computer to get photos when it was lookin better.

But here is a old thread

http://www.turbobuick.com/forums/turbo-lounge/202934-sage-cars.html

 

[3.8vsix]

His has two ports. Just need to screw out top beather plug, and buy a barb fitting at a hardware store.

 

[jrobichaud]

So according to the last post (thanks BTW), I should remove the screw on the top of the ATR wastegate, put a barb and vacuum hose on it and put a air regulator inline to adjust the boost. How is the boost being controlled in the current set up if there is only one vacuum line connected via 'Y' from the turbo housing leading to the wastegate celinoid?

 

[Quick6'n'-K.C.]

Years ago, i was told not to do that.

I think it has to do with the diaphragm., you can do it with the new gates, but im 100% positive that your not supposed to do that, something about it needing to be modified. ????

Call john craig in lake havasu he owns limit engineering and rebuilds turbo regal turbos. Also does the gates.

Sorry i dont have all the facts for you, i just never had any issues with mine so far. And never removed that filter from what i was told in the past.
BW

 

[3.8vsix]

I have had two of the ATR ext wg's and have them hooked up just as the diagram and no problems here, they have been this way for several years.
BTW, remove the brass vent plug not the aduster screw and nut, for the barb fitting.
HTH

 

[just plain john]

Hmm, I have the ATR and it too only has one port and the brass vent. I bought it used from a board member and it is not in use yet. So again, can anyone say WHY it should not be run this was? It will be my first externally gated DP, so I want to do it right the first time.

 

[incharge]

All you have to do to increase boost is to tighten down the big allen screw start off with 1 complete turn in , take it for a ride and watch your boost gauge if boost increases say 2 # then you know every turn = 2 # of boost you can run a dial regulator inside the car and have the discharge out of the regulator just run into the atmosphere ..

 

[jrobichaud]

Thanks incharge. I've heard turning that screw was not the way to do it; though it seems sensible to be given there is a sticker on it that shows clockwise turns will increase. This gate was installed in 2004 so not sure if new models had been introduced by ATR since 2004. How else is the boost controlled?

 

[incharge]

That is the only way to adjust the boost give it a try it will turn in a lot of turns start off with 1 or 2 turns at a time I always carried a allen key in my console and adjusted mine at the track . that is a good wastegate

 

[just plain john]

Hey incharge, wasn't it you I got this DP from? I'd like to plug the widebang bung for the time being, do you recall the thread size?

 

[incharge]

Yea it was me you got it from I do not recall but it should be the same as the stock gm o2 sensor .