1985 Buick GN 6.0/4L80

[wallyinc]

I've been a visitor on this forum for a very long time, reading and learning much. I thought I would contribute a bit. I've owned my '85 GN for 7years. I'm 32 now, but a GN had been my "dreamcar" since I was 12 and would see them run at the local track.

My plan was to keep the car as original as possible, leaving the hot-air-6 intact. I worked on paint/tires/suspension and the last thing did was install a set of Dakota Digital Gauges. At this point I realized that the engine was going to a skyrocket temp of 240degrees and had 3psi of oil at idle. I looked into rebuilding the engine/turbo/tranny, but it seemed the most cost efficient thing to do was install a new engine/tranny.

I found a 6.0/4l80 combo and BRP motormounts/crossmember/header combo was used to get the engine in. I couldn't be happier with the result and I plan to put as many miles as possible on the car as I possibly can

Below are few pics showing my Buick along the way, the 4th picture is my dad with the car. Thank you again for all the posts. I'll update w/ more photos as I do more modifications.

 

[LEW_86]

Looks good! I was going to go that route with an 85 but ended up purchasing an 86. If my motor ever gives out I will consider the set up you have while rebuilding the original. Well done.

Posted from the TurboBuick.Com mobile app

 

[wallyinc]

Thanks Lew_86, I'm looking to do forced induction after the first 10-20k miles. Do you have any pictures of your GN up on the board?

 

[hungerbuhler1]

What are brand, size and offsets of those wheels? Looks great! You nailed it

 

[goche4]

nice job bringing her back looks great

 

[wallyinc]

Thanks, goche4! I have much fun driving her around. Looking in the South Texas area for a custom tune right now.

hungerbuhler1, the wheels were made by http://www.ccwheel.com. Great guys to deal with, great customer service, and it's a great feeling knowing that a set of wheels are being made specifically for you and your car.

18x9.5 CCW 255/35/18 front
18x10 CCW 275/40/18 rears

I am running Continental Extreme Contact tires all around. I was really surprised how much better the car handled over the stock wheel & tire size.

 

[hungerbuhler1]

What was offsets?

 

[wallyinc]

I see in my car's log that I ordered:

F: 18x9.5 backspace 4.75
R: 18x10 backspace 4.75

I was dealing with 'Chip' over at CCW, great guy and again, great customer service, he was a great help.

I'm running completely stock suspension with freshened up bushings, shocks, and springs. I had purchased new springs (for a V6) back when the car had the turbo. They sit well w/ the heavier 6.0 and 4L80 tranny in there.

 

[hungerbuhler1]

Thanks! No rubbing in rear? Any pics from the rear?

 

[NyBlankets]

Great looking GN.

 

[wallyinc]

I will get better pics of the rear as soon as the south Texas weather clears up. Only very slight rubbing on front pass. side when I hit big potholes at higher speeds, but I've had had the same problem with two other gbody's in the past.

 

[wallyinc]

I have about 400miles on the new engine in my GN. I am getting this trouble code, I've been told by other mechanics it's because my o2 sensors are located at the header collector and not on the manifold, and that a custom tune will take care of it.

Problem is that getting a custom tune is a 3-4 hour drive away and I don't think I can get away from work for a month or so, will running my engine with the system lean do any type of damage in the meantime? Thank you in advance.

 

[RUSTYSHAKLEFORD]

That is one sweet GN!!

 

[Chuck Leeper]

The lean code can/will be caused by a leak at the header/pipe joint.
A tune is not going to correct it.

 

[wallyinc]

Thanks Chuck! I will look into that this evening.

 

[garyk1970]

Looks great

 

[LEW_86]

Thanks Lew_86, I'm looking to do forced induction after the first 10-20k miles. Do you have any pictures of your GN up on the board?

 

[cwmccray]

I like the fact that you kept the CREATURE comforts of AC. Alabama aint TEXAS, but even in Alabama, we appreciate COLD AC. Great job. Tell more more about the AC adaptation.

 

[84beastregal]

Very Nice gn

Sent from my C5155 using Tapatalk

 

[BandAid]

Your car is SeXy... Whats the price for the wheels you ordered..