: Buick Grand National GNX



DopeStar 156
04-07-05, 12:39 PM
What's up with these cars? DO they really go 160 mph?! And are they all equipped with the 3.8 V6? I thought the GNX came with a V8? I found a really sweet one on eBay and I'm in love. I'm adding a Buick GNX to my wanted list.

1987 Buick Grand National GNX #451 (http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4540018696&category=6137)

slk230mb
04-07-05, 12:43 PM
All the GN's were turbo V6's the GNX included. I've always loved the GN, but man are they expensive for one kept in good condition. Seems I have to start saving for that and my CTS-V... :rolleyes:

Playdrv4me
04-07-05, 01:46 PM
Thats a beauty. I wonder if the CTS-V will be worth as much in 20 years. Then again, the V was not limited production either.

turbojimmy
04-07-05, 02:27 PM
The GN and GNX were single turbo V6s. The differences between the GN and GNX, from a performance perspective, were relatively minor. See here:

http://my.ohio.voyager.net/~rowilson/frtpge.html

Unless you want a garage queen, get a GN. It will be quicker than a GNX in no time and you don't have to worry about destroying the value of one of only 547 cars made.

Jim

DopeStar 156
04-07-05, 02:47 PM
True, but wil the GN do 160? That's what fascinates me. This is the only GN I have. My DUB GN.
http://www.cadillacforums.com/photopost/data/500/6136gn1.JPG http://www.cadillacforums.com/photopost/data/500/6136gn2.JPG http://www.cadillacforums.com/photopost/data/500/6136gn3.JPGThat red and green light in the center are my custom strobes I put in there. They alternate red and green. Niiiiice.

Stoneage_Caddy
04-07-05, 03:12 PM
160 is probably a reasonable estimate ..the thing has the aerodynamics of a brick when comapred to the 87 Turbo Coupe T birds tho....but they were good for a tick under 140 with only around 200hp out of the turbo 2.3 ....The GNX had darn near 300 if memory serves

But in the Early 80s the GN was one of the most slippery cars out there on the stock car circuit ....

Its the even more rare 1983 4.1 litre V6 (not a 4100) Indy turbo Rivera that also has my fancy .....only 3 of those were made....

http://www.indy500.com/pacecar/images/large/1983.jpg

turbojimmy
04-07-05, 03:42 PM
True, but wil the GN do 160? That's what fascinates me.

If the GNX did 160, the GN will do 160 with some minor tweaking. The difference in HP can easily be made up by swapping out a chip and turning up the boost. The cars are basically identical. The GNX had a ladder bar suspension and panhard rod that improved launching and cornering but nothing that would affect top speed performance.

Personally I wouldn't want to get anywhere near that MPH in a stock GN or GNX. It's a little scary at 115.

Jim

Stoneage_Caddy
04-07-05, 03:57 PM
If the GNX did 160, the GN will do 160 with some minor tweaking. The difference in HP can easily be made up by swapping out a chip and turning up the boost. The cars are basically identical. The GNX had a ladder bar suspension and panhard rod that improved launching and cornering but nothing that would affect top speed performance.

Personally I wouldn't want to get anywhere near that MPH in a stock GN or GNX. It's a little scary at 115.

Jim
LOL !!! Driven more than a few of this chassis at that speed , jimmy aint kidding ....SCARY !!!! almost feels as if your going lock to lock trying to make little corrections to maintain heading ..combined with over over over boosted powersteering ..... :eek:

HotRodSaint
04-07-05, 08:33 PM
I'm adding a Buick GNX to my wanted list.

I knew a lady who bought hers used through her sons dealer. Later her sons dealer dropped it off the lift. :o

turbojimmy
04-07-05, 08:50 PM
LOL !!! Driven more than a few of this chassis at that speed , jimmy aint kidding ....SCARY !!!! almost feels as if your going lock to lock trying to make little corrections to maintain heading ..combined with over over over boosted powersteering ..... :eek:

I haven't had my GN any faster than what I run at the track, which is 115. I had the digital dash modified to show triple digit speeds (otherwise it flashes at 85 MPH). The real chore is trying to get the darn thing to slow down so I can make the return road at the end of the track.

At least it's not like my '67 GTO. 400 HP and manual 4-wheel drum brakes. What were they thinking?

The Caddy does stop nice. The cross-drilled Brembo rotors haven't warped yet, which is more than I can say for the stockers when my mom is behind the wheel.

Jim

davesdeville
04-07-05, 09:52 PM
If my slower ETC can hit north of 150 then a GNX which is a full second faster in the 1/4 should have the power to do 160. Even though it does have the aerodynamics of a wall...

RobertCTS
04-08-05, 11:49 AM
We have a member who put the GN 3800 Turbo engine in his S10 pickup. Clean installation. Awesome power!

Ralph
04-16-05, 04:01 AM
http://www.fast-autos.net/buick/buickgnx.html


According to this top speed 124 mph.

For TurboJimmy...

http://www.fast-autos.net/buick/buickgrandntl.html

I shouldn't have gave away all my good musclecar mags from the late '80's to my buddy because I had a lot of info on these cars. Even shootouts with these and old musclecars. I seem to recall reading about some U.S. govt. agency purchasing a fleet of 100 of these, or it was the GN? For pursuit purposes, of course.

powerglide
04-16-05, 04:09 AM
yeah, thats more like it.....160 is doubtful

turbojimmy
04-16-05, 04:30 AM
http://www.fast-autos.net/buick/buickgnx.html


According to this top speed 124 mph.

For TurboJimmy...

http://www.fast-autos.net/buick/buickgrandntl.html


I shouldn't have gave away all my good musclecar mags from the late '80's to my buddy because I had a lot of info on these cars. Even shootouts with these and old musclecars.

Their 1/4 mile is better than most mags and the 0-60 is the slowest I've seen for a GN. Usually the slow 0-60 is accompanied by a crappy ET because they sit and spin. One of the big mags got a 0-60 of 4.9 in 1987 for the 'regular' GN. My brother's stock T-type does it in sub-5.0.

Jim