TTA vs TGP

[pvt num 11]

Hypothetical.  I've always wanted a TGP, but unfortunately, they're not a common sight here in Hawaii.  Neither is the '89 TTA, but I own one of those.  How would the TGP fare against the TTA?  My guess is not very well - unless the TGP was modded and the TTA was stock (like mine).

[Invasion1]

Hawaii eh.... 8)

What year TTA??

the 1980 Turbo TA or the 25th Aniversary 3.8 Turbo TA

[pvt num 11]

Oh, sorry, I should've been more specific.  The '89 LC2 one.  I'm not a huge fan of the later second-gen cars, unless it's a '77 or '78.

[GangstGP]

Can you show us some pictures? :D  I want to check out one of those cars so bad! I have heard about them but want to see.  :)

And I would try to race you because I am cool with losing to another Pontiac and I just like to race people :lol:

You would have to race me here in Oregon though because it is rainy as hell here and that way I would hook up better and probly smoke ya.;)

[Invasion1]

same engine as the Buick GN's in that TTA.....3.8 Turbo





TGP will not keep up to that..

[R Dubya]

most definetely wouldn't.  those are about the only f-bodies you would catch me driving.   8)

[z284pwr]

Oh thats bad ass :), if my research has been correct, the ONLY GM vehicle to come with a 3-Bar MAP sensor from the factory?

either way, very nice, any other info on it?

[dbtk2]

I don't remember exactly what those TTA's ran stock, but I can safely say without refreshing my memory, that basically every single TGP, modded or not, on this board would get a nice spanking by a TTA.  Now GTP vs. TTA would be a different story.

Shawn

[sleeperred90tgp]

I would it guess it depends  on how fast the go. Under 13*? No Idea.

Jud

[mfewtrail]

Magazine times seem to have a good bit of variance in the TTA's. Some examples:

13.5@103 mph

13.4@101mph

14.21@97.8mph

14.18@95.8 mph

13.9@99.5 mph


Stock vs. stock without a doubt is going to go to the TTA.  A pretty good modded TGP should be able to match or beat some TTA's(if they do run as those magazine tests reflect....the high 13/low 14 second ones anyways).


Oh yeah, here's a list of 1/4 mile times for some of our TGP's here.

http://home.alltel.net/mfewtrail

[GangstGP]

3-bar map sensor? that is for like 15- 30 psi or something. They came stock with a 3-bar? That would spank a TGP on dry ground.

I dunno those cars are so light in the ass end. I have grown to like my front wheel drive turbo. If I wanted to walk the ass around a parkin lot and look like all these Camaros getting shitty. No its got more coolness factor, and I would try to get it into the 12's and know who I would ask to help, The GN boys in town here with timeslips in the 12s.

[TGPilot]

Also understand that the magazines/reviews of that time were censored by GM because no GM vehicle could post times or HP/Tq ratings that are higher than the Corvette of that specific year.

Even a modded TGP/TSTE would have an extremely hard time keeping up with a Stock 1989 TTA.

Most TTA's and GN's for 1989 had un-official GM hp #'s were up and around 300+ HP

If the TTA really made 300 HP why did GM rate it at "only" 250 HP?

The generally accepted explanation is GM's unwritten rule which states no passenger vehicle shall have a higher horsepower rating than that year's Corvette.

In 1989 the Corvette was rated at 255 HP.

engine:  3.8L SFI V6 Intercooled Turbo
            GM rated 250 bhp @ 4400 rpm, 340 lb-ft torque @ 2800 rpm

With a 3340 Curb weight it is only 140lbs heavier than TGP coupe and 40lbs heavier than the TSTE... :wink:

[pvt num 11]

The previous owners of mine ran a 13.8 bone stock.  Added a chip, went 13.2.  I haven't gone myself, and I probably wouldn't be able to launch the car properly - power-braking is still a mystery to me.  Some quick specs, not complete...

231 cid, or 3.8 for the metric folk
8:1 compression, with modified heads from the 3800 FWD engine
16.5 PSI boost with Garret T3 intercooled turbo
rated at 250 hp at 4400 rpm, 340 ft/lbs at 2800 rpm
200R4 four-speed automatic transmission
3.27:1 Borg-Warner limited-slip diff.
weighs 3346 lbs, but depends if it's a hardtop or t-top model.  Most were t-tops with leather seats.  Mine is t-tops and cloth, whhich were more rare.

EDIT:  Oh, I don't doubt that a modded L67 GTP could beat a stock TTA.  I see a GTP with a bunch of stuff on it, and I give it some healthy respect - he could be pushing more boost then me, and some weight loss and sticky tires and I would see some tail lights.

[Jeff M]

3800 heads instead of stock 3.8, so the engine would clear the lower hood line.  3-Bar Map for boost gauge only, bummer as there would be an huge untold amount of people hacking that chip setup into their turbo ride 8)

Jeff M

[dbtk2]

EDIT:  Oh, I don't doubt that a modded L67 GTP could beat a stock TTA.  I see a GTP with a bunch of stuff on it, and I give it some healthy respect - he could be pushing more boost then me, and some weight loss and sticky tires and I would see some tail lights.

GTP's wouldn't be pushing more boost than you unless someone did a turbo swap.  Roots blowers are very inefficient and the M90 isn't barely big enough for the engine anyways, so non-intercooled typically they run about 11-12psi, intercooled typically 14-15psi.  My dads GTP set the highest stock cam dyno record and 1/4 mile record and he was making 16psi, and thats with the smallest pulley that can be used on the stock M90 blower and have it still be efficient, and it took lots of tuning and lots of heat management (insulated everything) to make it be able to push that kind of boost with no KR.  Anyone running more boost than that is either getting a lot of KR or running a newer M90.  

Shawn