1991 Mustang GT Vs. 1991 Z28 or IROC-Z

[Unit 5302]

The Turbo T/A was a high 13sec car. That's certainly not "the fastest" TA ever made by any stretch of the imagination.

Considering it's basically a Grand National engine in a TA, it obviously has potential, but cranking up the boost doesn't keep it stock. People also tend to automatically think 13's or better when they hear "Grand National." The GN's were 15sec cars from the factory in most cases. Turn up the boost, shift kit, and you're in the 13s easy though.

[DeViL]

performance: 0-60: 5.5 sec
1/4 mile: 13.5 sec
60-0: 139'
roadholding: 0.86g
weight/hp: 13.4:1

And you can get a faster 1/4 mile time then that with those things. Let me put it this way, they were the fastest Trans Am ever built, A ls1 Formula Firebird with ram air will out run it in 1/4 mile. Trans Ams today are still about the same weight as mine 3500-3700 where as the TTA weighed around 3300 which made all the difference. It's not 250hp like it's rated either.

[Unit 5302]

Okay, then I will quote the 87-88 SD Mustang 5.0 as a 13.8 car from the factory, because some people were able to get that out of them.

Don't go quoting the absolute best times possible for a car and expect me to sit around and go wow.... that's what they all run, right?

By that logic, the new Mustang GT's are also 13.7 cars from the factory, because some people have been able to get that out of them, and later LS1s are 12.9 cars, the new Cobra is a 12.3 car, etc etc.

I consider it ricey to quote cars performance based on the best possible scenario.

[DeViL]

13.5 wasn't the best time possible with it. Thats about an average time for a TTA.

[Unit 5302]

Interesting that the Turbo TA's were so efficient they could run low 13's with a 100mph trap speed... Just like the legendary Grand Nationals, which trapped right around the same.

Boost mods, wastegate mods, cheap mods. That's not stock. Dumps, bumped timing, removed silencer, accessory bypass, and an iced intake would put that 13.8 5.0 right in the low 13's. Do you see me quoting the fox body as a low 13 car stock?

[Los]

Originally posted by Unit 5302
Interesting that the Turbo TA's were so efficient they could run low 13's with a 100mph trap speed... Just like the legendary Grand Nationals, which trapped right around the same.

Boost mods, wastegate mods, cheap mods. That's not stock. Dumps, bumped timing, removed silencer, accessory bypass, and an iced intake would put that 13.8 5.0 right in the low 13's. Do you see me quoting the fox body as a low 13 car stock?

[DVS LT1]

Well, if you go by the magazine shoot-outs between the Mustang and Camaro during those years you will indeed discover the origin of the concept that the Ford 302's were quicker than the Chevy 305's, but not quite as quick as the Chevy 350's (and yes you only got an automatic with the 350). Of course there are ringers and lemons that come out of the factory - but having tested these cars against each other for so many years these magazines like Car and Driver, Motor Trend, etc... came to this conculsion every time.

Now, you throw a much more expensive 245 HP Cobra into this situation and it changes things - but I think I remember the Cobra not even being as fast as the Chevy 350 either (if it was, not by much).

Fact is having grown up driving around in 5.0L's & IROC's, the Mustang's simply couldn't hook as well as the Camaro's. The suspension all around in the Stang's was pretty wanting, and although I can't say that a Z28's was that much better - the performance suspension upgrades in the IROC-Z's and WS-6 Trans-Am GTA's were simply awesome for their time.

And whichever dude said he hunts down LT1 F-bodies in his two stock 5.0L Stang's is either SO full of shit, or 1 in a billion - cause he managed to get 2! (TWO!) ringers from the factory! Its not impossible - my old nieghbour had an automatic '96 LT1 Collector's Vette (no LT4 with the auto's) and this fucking thing ran mid 13's at the track (13.6's) right from the factory, everytime! (with no tire pressure tweaking, launcing, anything!)

Otherwise, don't be giving other fella's with stock 5.0L's (even slightly modded ones) false hope - cause they're no match for the LT1.

P.S - I still love old 5.0L's and IROC's, they are the ones that got me into this shit!

[DVS LT1]

Originally posted by Unit 5302
Interesting that the Turbo TA's were so efficient they could run low 13's with a 100mph trap speed... Just like the legendary Grand Nationals, which trapped right around the same.

Boost mods, wastegate mods, cheap mods. That's not stock.

Not to digress off topic too much, but I can't figure out if you're being sarcastic or just don't realise that the anniversary T/A's had the exact same 3.8L Turbo intercooled engine that powered the Grand National's. That same motor also found its way into the limited edition Cylone pickup and Typhoon Blazer.


[quote]Originally posted by Unit 5302
Don't go quoting the absolute best times possible for a car...

I totally agree - but in the case of the Grand National, they were ALL super low 14 second(like flat) or sub-14 second cars. And the '87 or '88 GNX special edition Grand National's all clocked mid-low 13's on the track.

Is it still considered "stock" if its hot-rodded from the factory?

[GTStang]

Originally posted by DVS LT1
Well, if you go by the magazine shoot-outs between the Mustang and Camaro during those years you will indeed discover the origin of the concept that the Ford 302's were quicker than the Chevy 305's, but not quite as quick as the Chevy 350's (and yes you only got an automatic with the 350). Of course there are ringers and lemons that come out of the factory - but having tested these cars against each other for so many years these magazines like Car and Driver, Motor Trend, etc... came to this conculsion every time.

Now, you throw a much more expensive 245 HP Cobra into this situation and it changes things - but I think I remember the Cobra not even being as fast as the Chevy 350 either (if it was, not by much).

Fact is having grown up driving around in 5.0L's & IROC's, the Mustang's simply couldn't hook as well as the Camaro's. The suspension all around in the Stang's was pretty wanting, and although I can't say that a Z28's was that much better - the performance suspension upgrades in the IROC-Z's and WS-6 Trans-Am GTA's were simply awesome for their time.

And whichever dude said he hunts down LT1 F-bodies in his two stock 5.0L Stang's is either SO full of shit, or 1 in a billion - cause he managed to get 2! (TWO!) ringers from the factory! Its not impossible - my old nieghbour had an automatic '96 LT1 Collector's Vette (no LT4 with the auto's) and this fucking thing ran mid 13's at the track (13.6's) right from the factory, everytime! (with no tire pressure tweaking, launcing, anything!)

Otherwise, don't be giving other fella's with stock 5.0L's (even slightly modded ones) false hope - cause they're no match for the LT1.

P.S - I still love old 5.0L's and IROC's, they are the ones that got me into this shit!

I have raced IROC,Z28, GTA, and all of them stock from the Factory have not beat my stock 87 GT. My is by no means a factory freak I wish it was.
But I i totally admit a LT1/LS1 would eat my stock GT up. Hence why it isnt staying stock

[gogo5o]

the only 3rd gen firbird or trans am that would beat a stock mustang 5.0 was the 89 anniversary edition trans am with the 3.8 turbo grand national motor in it other then that all other camaros and firebirds would lose i should know i was a bowtie boy but i learned my lesson and switched sides to Ford

[BlkCamaroSS]

That's a shame.

[GTStang]

But ooooo so right!

[BlkCamaroSS]

[GTStang]

Such Hostility

[cobra_d]

I think that whoever said the Mustangs just didn't/don't hook well enough to run with the Bowties is absoloutely correct. I'm running a 2001 Cobra and I know for a fact now that there are 3 things to do first on a Stang to make it 'fast' Take weight off the front end, install a good clutch, and lower the final drive ratio. Forget power mods until you take care of these things on a Mustang, 'cause it don't do any good adding power if it doesn't go to the ground. I added an Anthony Jones front coil-over with tubular K-member, Bilsteins all around, some chassis bracing, 4:10 gears, and a Valeo dual friction clutch to my 2001 Cobra. I used to either break loose and smoke or, if I clutched trying to hook, get an extraordinary amount of wheel hop, both of which contributed to rotten 60ft times. Well, I can guarantee you it don't happen no more. I haven't had a chance to test it against a bowtie, but I have been able to teach a Porsche Carrera, a couple of Mercedes, and a BMWM3 that 'just a Mustang' isn't slow. (hehee) Oh, Power Mods: Bassani Cat Back, Cold Air Induction with KNN filter, ported and polished heads, underdrive pulleys, and a BBK straight through X-pipe. Got a ticket for being too loud, but the cop was too fat to crawl under the car and see if I had cats or not. Coming up: Ford Racing Variable Runner Intake, FR500 heads with FR500 high lift Camshaft kit, and Long tube headers. I have no idea how much HP im running but I would guess it is around 360 TQ and 350 HP. (Before Mods, tested at 340 tq/335 hp (corrected) for 15% DT Loss.)--Oh, and about 200 lbs lighter than a stock 2001 Cobra. BRING BACK THE CAMARO, AND MAKE COBRAS AND VETTES BETTER>SCREW OVERPRICED EURO's AND OVERENGINEERED RICERS....