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Car is also posted in for sale section Car is located in Mansfield, Ma. Call Joe if you have interest @ 617.877.7270. I paid $14K for the car last year and put about $2k into it. Not looking to take a loss. Price, if interested is $15K. To see pictures, click this link. 1987 GN pictures from...

Entertaining offers for 1987 GN. Professionally re-built drive train by Cotton’s Performance less than 8k miles ago. Car has 81k miles on chasis. Entire undercarriage coated in POR-15, with polygraphite bushings, new springs, and bilstein shocks. Stainless transmission lines with front mount...

Entertaining offers for 1987 GN. Professionally re-built drive train by Cotton’s Performance less than 8k miles ago. Car has 81k miles on chasis. Entire undercarriage coated in POR-15, with polygraphite bushings, new springs, and bilstein shocks. Stainless transmission lines with front mount...

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...

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'...

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...

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

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...