Project Darkside 1987 pro-touring Buick Grand National

[dsapper]

I've kept this on turbobuick.com for the most part but wanted to put the thread up here.

Basically I've been down the pro-touring road with a couple cars, mainly a 72 and 69 camaro. They turned out awesome but were not really what I wanted. I wanted a car that I could drive on the power tour, take to the track (road and strip), drive to work or just swing by the grocery store. Reliability, power, handling, braking, comfort in a classic platform.

The car I decided on was a 1987 Grand National. I've always loved the car and it was a great platform. Its a full frame so its easier to work on. The car itself is almost a pro-touring car out of the box. The engine is already a pro-touring worthy engine, a/c, power windows/locks, fuel injection etc.

So this is the car I bought, a 1987 Grand national with 60k original miles, no accident damage, 0 rust and basically stock.
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I drove the car for a couple days, hot rodded the living hell out of it and blew a head gasket. I figured the easiest way to change the head gasket was to do a frame off... lol

[dsapper]

So, time to get to work

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Good news is none of the bolts were seized, no rust to speak of, no tweaking anywhere. Amazing how easy this was compared to my 69 camaro.

[dsapper]

The plan is to strip the frame down, blast, brace, box and powder coat it.

I'm upgrading the suspension quite a bit. Spc uppers, lowers, veri-shocks, spc springs, lee 670 steering box, dse steering shaft, sphoon pro-touring rear swaybar, helwig front sway bar, fays watts link rear end, currie upper and lower rear control arms.

To handle the stopping I'm going to rip out the problematic powermaster and replace it with vacuum brakes. I'm upgrading to baer track 13" front and rear brakes.

To handle the power I've got a custom 4" aluminum driveshaft mated to a currie track ford 9" rear end with a diff cover to keep the illusion that its a GM product lol. The rear has an lpw cover/pinion brace, 3.50 gears, 33 spline axles and a nodular rear with a truetrack in it.

For the engine I wanted to keep the buick motor. I'm starting off with a stock clean shortblock, adding champion aluminum heads, a6262 billet ball bearing turbo, alcohol injection, ported intake, plenum and tb, rjc pulleys, ta headers, rjc downpipe, cotton exhaust, high volume oil pump, 210/210 roller cam with 1.55 roller rockers.

For the transmission I'm going to be swapping in the TCI 6x. Its a 4l80e based 6 speed transmission with paddle shifters.

All of this is on top of countless other parts and modifications.

[dsapper]

so, out with the old...

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And in with the new...

The baer brakes are awesome!
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The CCW wheels came in and were mounted. They looks like a GNX inspired wheel with the black center. They are a shotpeened finish, I can't tell you how much I love these in person
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The alcohol injection kit, my new chip for the ecm and the 60lb injectors
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[dsapper]

In the theme of this being a real driver I wanted the bottom of the car line-x'ed to reduce noise. The car was decapitated and sent out

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And I got this back, sorry for the picture quality but it was very hard to get pictures of, but it came out great
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[ILLMATIC]

i like this project , check out speedtech.com they have some new cool suspension for the grand national and please keep the pics coming !!!!!

[dsapper]

Next item was the frame. All the factory seams were rewelded, some major areas were plated, the frame side motor mounts were welded to the frame and boxed, the frame rails were boxed and one body bushing mount was repaired.

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[dsapper]

Few more pictures of the frame, its condensed pretty well on these two posts but it was actually quite a bit of work and took quite awhile. As soon as this was done we sent it out for powdercoat

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[dsapper]

I went with "Silvervein" for the powdercoat color. I was going back and forth between black or another color and decided on something besides black to highlight all the work that went into the car. Silvervein is more of an industrial powdercoat and I've actually seen it everywhere, never seen it on a frame before.

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Next, is some chassis assembly!

[dsapper]

Here is the rolling chassis going together. I used all new components. A spohn front end rebuild kit, howe tall screw in upper and lower ball joints, spc adjustable upper control arms, spc tubular lowers, spc springs, varishocks, lee 670 steering box, baer brakes and spindles, helwig front sway bar etc

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[dsapper]

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[dsapper]

The back half was a pain in the ass. The fay's watts-link will not work with a ford rear end. No room for the brackets, so we had to fab some up. There is not alot of room back here especially with my insistence that there be dual exhaust that goes over the rear axle and out the back of the car.

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[dsapper]

The rear swaybar was an issue. There was no room left on the rear end housing after the watts link brackets, so we improvised. We cut the swaybar mount in half and welded it to the watts link brackets, pretty ingenious actually

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[GNon18s]

Glad you started a thread over here.

[dsapper]

Thanks

So we powdercoated the custom brackets and installed and powdercoated the new crossmember to fit the 6x, replacing the crappy 4 speed that comes stock on GN's.

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[dsapper]

Next thing on deck was the engine and transmission.

I am going to be driving this alot and abusing it so I really went overboard on cooling. I have a highly modified oil pump, massive oil filter, 4 core aluminum radiator, high flow water pump, and ceramic coated every piece of the exhaust with 2000* coatings.

The exhaust is a big improvement as well. I went with a set of TA stainless steel headers, RJC 3.5" downpipe and a cottons dual stainless exhaust.

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For the engine I have a pte 6262 ball bearing turbo, these things are amazing. I also went with champion aluminum heads, massive improvement over stock. The camshaft is a 206/206 hyd roller from comp cams, major upgrade. I also had the stock tb ported and polished along with the upper plenum and lower intake manifold.

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[ILLMATIC]

any info on the motor ?

[dsapper]

I wish I could show you what you have to go through for the head gaskets on these things. First ARP studs, second 3m construction adhesive, third custom multilayer head gaskets. Hit them with a heat gun to heat cycle and torque the heads half a dozen times.... its an insane process to make as much power as I want to out of the little 6.

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I painted the engine black, powdercoated everything that is silver an "aluminum" color and got some nice black wrinkle coated valve covers

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Final engine picture before it goes in the car. I powdercoated the accessory brackets, used black anodized RJC aluminum racing pullies, installed the fuel rails and the fuel injectors. Lots of cool bits installed at this point, stainless fuel lines, billet adjustable fuel regulator, silicone instead of rubber hoses etc.
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And the star of the show, TCI 6x transmission. I love this thing! It looks amazing. It has 6 gears and a dedicated ECU. I got the paddle shifters with the digital display. There is a custom made PTC converter and adapter plate to make all this work together.
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[dsapper]

any info on the motor ?

Stock the grand national has a 3.8l V6 engine. Good engine with unlimited potential if not a bit dated. I'm keeping the stock bottom end and replacing and upgrading everything else. These motors really shine when you free them up to breath and put a real turbo with some alky in them.

The car is done minus some tuning, I'm catching up the thread on this forum. I'm guessing the car has 500+whp, track time and dyno time will tell. That is at 23 pounds of boost with alcohol and 91 octane. Not bad for 3.8 liters though, beats my 2011 Grand Sport corvette by a long shot

[ILLMATIC]

everything looks great

[craigs73]

awesome one of my favorite cars!!

[dsapper]

Chassis, engine and transmission finally got to meet each other, they seem to be getting along fine ;)

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[dsapper]

So everything is together and the body is ready to go back onto the chassis. Some finished chassis porn.. Few braces installed, lines being run etc. I swapped the crappy tci stamped steel trans pan for a nice cast aluminum piece, they should include that for the price you pay...

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[E-Vukets]

Great work, that power coated chassis will really show off how extensive of a build it is for people who look under the car. Those rims are amazing, I can't wait to see how they look on the car!

[dsapper]

Great work, that power coated chassis will really show off how extensive of a build it is for people who look under the car. Those rims are amazing, I can't wait to see how they look on the car!

Well, wait no longer! lol. This is the body finally going on the chassis. Besides having to chase some holes because of the line-x it dropped on no problem. We used urethane bushings with the full gnx kit. For those that don't know there were different body mounts depending on the car, gn, gnx, cutlass etc.. The full kit uses all the body mounts

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Oh and if you were wondering about the project name... I always though this car would be what Darth Vader would drive, so the name Darkside lol

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[carguykeith]

All I can say is WOW! I can't imagine how much work you have in that frame, just burning in a couple of braces and notching mine took forever.

Beautiful car and great build.

[mild2wildpaintngraphics]

Nice attention to detail. Good job! Fast with class!!

[dsapper]

Thanks guys

So the next thing to do was to finish the engine install. When I put a 400 small block in my camaro it took 2 hours, this took two weeks ;p

Installed the core support, aluminum radiator with dual spal fans and the PTE stock location stretched intercooler
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[dsapper]

So in the spirit of what I wanted to do with this car, I was adamant that the exhaust went out the stock location. I have had turn downs on my 72 camaro and it was annoying. Well after installing a massive ford 9", a huge swaybar, wattslink and bars.... there was almost no room but we got it.

I sent it out to be ceramic coated so now 100% of the exhaust is coated.

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[DeltaT]

Well, how's she handle and drive? I am going down almost the same route.

Jim

[dsapper]

Great, it was a bit firm but I just upgraded to ridetech coil overs and couldn't be happier. Its actually done and going through a round two of modifications and getting a bunch of body work and a few upgrades.

I haven't had time to update this thread but the buick one here is up to date..

http://www.turbobuick.com/forums/threads/1987-pro-touring-grand-national-from-the-ground-up.351277/

[GT500KR_Vert]

very nice project and car, one of my favorite cars growing up.

[williecutlass]

CAR LOOKS AWSOME. I might of missed it somewhere, but what size tires are you running?

[Typhoon1015]

this thing is ridiculous. I love pretty much all of the suspension set up. great choices on parts.

[CodexGigas]

Car is Gorgeous, I Love G Bodies!

[domcenzo]

So nice. Great vision.

[Bigbird3]

Looks great! Can you tell us the wheel and tire specs? Not doing any frame notch/minitub?