Came across an old pic I took in Arizona, thought I would share!

TTA and GNX

:hail:

 

Wow two of my dream cars in the same place at the same time

 

more:

http://community.webshots.com/photo/...27162921rtDGFP

http://community.webshots.com/photo/...27165417UckOCt

 

Here's a small one page TTA vs GNX comparo:
http://bellsouthpwp.net/j/s/jstriet/gnxtta.jpg

 

cool pics and comparison. What made the GN rate roughly 50 HP and ft-lbs better than the TTA?

 

well b4 i read it i was gonna say intercooled, but now i remember , they lied about the tta . Gm has the rule where they cant have something with more hp than the vette of that year . And i think the vetter of that year had 250 or 260 , somehting around there. When they dynoed those tta's they were like 300 hp .

 

Two great cars!!! :hail:

 

well.. the gnx was rated at 300 hp in that article, that being higher than the vette...

another thing that caught my eye was the fact that the tta has an 8.1:1 compression ratio while the gnx has 8.0:1, however the gnx is rated higher.

 

The Vette for those years had 250Hp. The TTA of that year had 305Hp. Being GM, that can't be broadcast out to the public. The TTA was one fast stocker. I would take either of those cars, awesome digs Colin!

 

I know the 89 tta heads are different then the 86-87 gn's heads, along with the pistons, which may cause the compression to be different but I am not entirely sure. The only real difference between the 2 (engine wise) was the heads and pistons w/ maybe a few minor things.

 

Well,
Besides other small things, the GNX used different gearing than the TTA.
The TTA has 3:27 rear, and only smokes the tires stock with the brake on.
The GNX has around a 3:42 rear, and smokes from a dead stop, no brakes!
I don't know off hand what the '87 GNX/'87 Vette hp ratings are, but in '89, the Vette is rated at 255 hp, while the 20th TTA is rated at 250 hp!
The funny thing is, read the Vette magazine that year, between the two cars! The 20th TTA ate the Vette up!
But the editors said the Vette was the better buy! Right!
Now, the part I like is, that the GNs and such, all have governors limiting the top end, while the 20th TTA doesn't!
Did you know that at the '89 Indy 500 race, the 20th TTA was clocked at 172 miles? Yep, the straightaway is alittle bit longer than a mile. All the car mag tests on top speed were less than a mile in length!

Just letting you know,

George

 

The Corvette disvision of Chevy has a lot of say in GM's other sports cars. For example, there was no 2ndgen 'vert because the Corvette guys didn't want to compete with a roadster from within their own company.

 

Although I love both of those cars. The Corvette was a better bargain and more of a true sports car. I own a 91 Z28 and a 85 Corvette Z51. Even with 1LE brakes and FE2 on the Camaro The Corvette handles the twisties better and is more fun to drive.

 

GM just rated them that way.

The TTA had the same intercooler, which was much more efficent than the standard GN. The TTA had better flowing heads than the GNX, but the GNX had a more efficent turbo. The GNX ran a lower fuel preasure and lower boost (15lbs for the GNX and 16lbs for the TTA). The rule of thumb is 1lb of boost is good for about 15hp. And as George says the GNX had the better gearing.

The GNX is heavier than the TTA by about 100 lbs. With all of that in mind both cars were under rated and make about the same power (~300 hp) in stock trim.

Both are great cars. I would love to add a GNX to my collection.:hail:

- Dave

 

2 of my favortie cars, i'd take a tta in a heartbeat aswell as a gnx

 

If I'm not mistaken, you could have almost bought two vettes for the price of a Turbo TA...didn't they sell for around $50k, esp after all the dealer "market adjustments"?
I'd still MUCH rather have the TTA, but its far more a bargain now in used, low mileage form ($18k or so for a really nice one) than it was new.

 

50K? Not sure where u got ur number but try 30K, lol. Never heard of any camaro or firebird being 50K.

 

Sorry, I was way off but few ever sold for sticker, at least in this part of the country. Dealers here even marked up regular GNs several thousand dollars over. BTW there was a thirdgen selling for around $50k though, the 92 Firehawk, fully loaded!

 

But it didn't sell for 50K at the dealership is what I was sayin.

That 50K firehawk costs 50K today because of its rareity now (even though I don't think anyone will buy it for 50K unless they have money to blow, thats way to much)

 

I haven't seen a firehawk sell for more than 40k yet in the used market. Most of them have sold from 20 to 30k used.

The Firehawk was $50k when new, and almost $60k if you got the full cage and all the performance options such as the brembo brakes.

TTA's are 30k new, and usually go for about 10 to 15k I think.

I'd take a GNX over my GTA any day of the week, but if I had to choose between the TTA and the GNX I'd go for the TTA.

 

Where's the GNX?? I see a GN and a TTA, but no GNX...

 

Thanks for Sharing. So few cars I really like near stock looking.

 

the 91-92 firehawk was 50K brand new? wow, thats to much, lol.

Yeah my buddy just sold his 89 TTA for around 12K and he was very happy with the sale so I would think they sell around 10-12 normally now. Heres a whole list of 89 TTA Ebay Auctions that have been sold on ebay in the past.

 

I have an 87 GN and from what i understand the TTA used the grand national set up- while the GNX was sent out to maclaren to be fitted with a bigger turbo, better intercooler, and some more engine mods- thats why it was a 10K option for the GN- among other things you had the fender vents and bigger fender flares welded to the GNX to set it apart from the GN- am i correct that the TTA used the GN turbo set up and not the maclaren GNX?

 

the auction in las vegas is my buddy craigs car. he pulled the auction to take car of some paper work in the car first. first car i ever rode in that scared the hell outa me. :hail:

 

AJT86, your right that the GNX was outsourced to ASC/McLaren. They took stock Grand Nationals and did mods to them to come out with the GNX. The GN was rated at 355 ft/lb of torque at an 2400-RPM and 290 HP at 4400 RPM. I dont have the numbers for the TTA, but im sure they were like that. Then Mclaren shook the magic wand over the car and made 420-ft/lb torque at 2400 RPM and an 330HP at 4400 RPM. The 0-60 MPH times were about 4.7 seconds, while ¼ mile times were about 13.25s at 104 MPH. McLaren added a special Garrett turbocharger, lightweight ceramic impeller, and a better intercooler. A modified computer chip and a low restriction exhuast rounded out the power upgrades. To handle the extra power the transmission was improved for better shifts and the torque converter was upgraded. To compare the GNX to other cars of later years is silly(peformance generally increases over time). They might have more power/be faster etc, yet they werent made in 87 so it doesnt matter. The 87 was a one of a kind, and the best car GM made in 87. Thats just my 2 cents. I would be very careful if you come up to one at a light, and havent done serious mods to your 3rd gen.

 

yeah man i was use to driving around in my 92 RS v6 5 speed- i went out and found an 87 GN last week after doing **** loads of research on them and when i spooled that turbo up for the first time i fell in love- i mean i love my 3rd gen but this thing is a mighty fine "sleeper" i guess you could call it- most r*icers think its a granny car then they see my tail lights the 87 grand nash and GNX are spectacular cars no matter how you look at them- they are quick and mean looking- and 70BuickSleeper is right- watch out at the lights for them for under 2 grand you can have these things in the 9s

 

It was a GNX dude

http://image10.webshots.com/11/6/31/...7irMpAY_ph.jpg

http://image08.webshots.com/8/6/29/2...1rtDGFP_ph.jpg

 

Those pics are not of the same car.



(Notice no GNX vents on the first pic you posted, and the cars around the GNX in the second pic are different. The second pic is a GNX (or a GNX clone) , not the first one... )

 

lol what the heck? sorry guys, i guess there was a GN there aswell.

doh!