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03/15/2008, 4:29PM
How much Horsepower do they have?

I was wondering how much horspower the 1998 Pontiac Tran AM has? I got beat by a 1993 Mustang 5.0 with a Superchip and all the MSD Igniton stuff done to it,K&N Airfilter. The Mustang was a Automatice and so is mine.

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03/15/2008, 9:39PM

It's in the 200 range I believe, but the 302 with the additional stuff done to it was probably slightly higher.

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04/26/2008, 6:30PM

A stock trans am has 280 horsepower.

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04/27/2008, 11:20PM

if its an ls1 which was in the 98 trans ams it should be 330hp

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04/27/2008, 11:21PM

thats an lt1 which was 93-97 trans ams

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04/30/2008, 7:47AM

93-95=275 HP    96-97=285 HP    those are LT1 years

98-02= 305 HP LS1 years
bottom line, that stang should not have beat you

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04/30/2008, 7:48PM

Listed HP on 98-02 Camaro/Firebirds is lower than the actual.  It's the EXACT same engine that's in the Corvette's,
with a slightly different camshaft and exhaust manifolds.  The difference in HP is 10-15 at the most.

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What do you think?
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05/04/2008, 9:31PM

actual it is not the same as the vette. the heads, cam, intake, manifolds, t.b., injectors,and tuning are all different between the f-body and vette.

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05/04/2008, 9:47PM

Do you even have an F-body?  Read this post directly from the Admin of LS1Tech.com:

http://www.ls1tech.com/forums/showthread.php?t=87161

According to Nine Ball (an expert if you're at all familiar of F-bodys) the only difference WITHIN the engine is a
slightly different cam (as I stated).  Externally, the oil pan is different (because of the different K-members) and
serpentine system.  The heads, intake, and throttle body are all the same (minus the fact that Vette's have fly-by-
wire throttling.

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05/04/2008, 9:51PM

And here's an article of a dyno comparison of two identicle-year LS1's.  The F-body actually dyno's MORE (only due
ot the fact that IRS has slightly higher parasitic loss)

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05/13/2008, 10:43AM

the answer has nothing to do with horsepower by itself.  the power to weight ratio of the other car  better than yours.  your car weighs alot more than the mustang, and then add to it that there was work done to it, making his p/w ratio better than yours.  your car has a base weight of 3477lbs, and has 305 HP (got specs off of edmunds.com).  you have 1 hp for every 11.4 lbs of car.  the mustang on the other hand,  stock (and provided that this was a 5.0 LX mustang and not the GT) has 2834 lbs and 205 hp.  factor in the chip, air filter, ignition, exhaust and such, and the 'stang could have had at least around 300 hp as well. if the mustang had 275 HP after all the mods (this is suggesting that it had a mild chip), then the power to weight ratio would be 1 hp for every 10.3 pounds of car. the ratio is better and that is why the mustang won.

you would have to make your p/w ratio better than the mustang's in order to win.

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05/13/2008, 11:05AM

I can definitely see a Trans AM losing this one.  A fox body 5.0 is also a lot lighter than your T/A and with the work is has done to it, its really not hard to grasp the concept of it beating you.  LS1 or not .. all higher end V8 Mustangs ((5.0, Cobra, etc.)) get the most power at high rpm's .. You still have gear options in an automatic and with his chip, he was most likely using them to get his high rpms and bringing to car to max power around 5-6k rpms .. You probably werent.

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05/13/2008, 11:06AM

Well said!  :]

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06/08/2008, 1:50PM

are you sure the guy in the mustang wasn't sandbagging

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06/17/2008, 9:55PM

You should be making around 300-310 RWHP.  Either the Mustang is modded more than he is telling you, or something is wrong with your car.  A stock 98 Trans Am will beat a new Mustang GT, let alone the old 5.0 that made 240HP.

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06/25/2008, 9:44PM

well...there is alot more at work here than power to weight....you have to look at gearing, peak hp and tq...what the cars power range is...etc....and I dont care what power to weight says, that T/A will run circles around a stock 5.0, I've driven them both, I've raced them both, unless the 5.0 has alot of mods it wll lose to an LS1 T/A all day long.
I currently have a 94 trans-am...LT1 with a few mods...best et was 8.63 in the eighth...I see most stock LS1 T/As doing 8.80s consistantly, my dad has a lil 5.0 mustang(3.73 gears, ram air kit, shorty headers, flowmasters, etc.) best et is 9.45.
There is NO way that a stock 5.0 beat p on an LS1.  

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06/25/2008, 9:55PM

a stock 5.0 is done by 5500 rpms, chip or not, they really dont make a very big diff. The T/A will rev very freely past 6 grand, it makes alot of power up top, that 5.0 mustang must have had somthing more, a cam swap or some head work, who knows, but I promise, stock to stock there is no match, its the T/A, even with bolt ons tothe mustang its still no match...unless you  supercharge it or put a shot of nitrous on it.

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06/26/2008, 6:57AM

if it has to do with gearing and everything else, that's more in favor of the mustang.  if the guy spent a little bit of money on the entire drivetrain then sure he could win. i've only got cold air and the "s" pack for my '89 T/A, but i've got an aluminum driveshaft, a shift kit on my 700-R4, and $3500 worth of rearend in the car (currie 9", with 3.70 posi, torsion bars, sway bar upgrades, 2" lowering kit.), and a front strut tower bar.  i know that with my gearing i can outrun my buddies stock 88 IROC-Z all day long in the 8th; however, i would get run down in the quarter because of his stock gearing (3.23) gives him a faster times over longer distances.  and the numbers i gave you from edmunds were the peak numbers...i don't think that they would give me numbers other than that.  and as for your dads stang having a slower time, there are too many more factors involved there (no rip on him, but it could have been driver reaction time), and the fact that the car has less weight on the rear wheels and doesn't hook up as quickly as the T/A.  my car, with all of it's mods, beat a stock stang (only had flowmasters on it) simply because my gearing got me up to speed faster (and sure mine's an '89 and weighs an ungodly amount - like 3700 or something close to that - and the stang driver spun them in the shift to 2nd).   once he hooked up, he stayed even.  and power ranges for most domestic sports cars are between 4 and 6 grand. the tuned port cars like mine actually get theirs slightly lower than that (3700, 3800)because the fuel rails from the throttle body to the heads are like 9 inches long versus the 3-4 for an LT1 or an LS1.  i think that  you're giving the fox body far less credit than it's worth.  i'm not saying that i'm a fan of them; but i am saying that they shouldn't be taken lightly.

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06/26/2008, 10:35AM

Does it have the LT1 engine in it?
The trans Am weighs more than the mustang does.
its chipped, and has a race ignition, you shoulda known you would lose. jk.

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06/26/2008, 6:09PM

first off, my dad has been racing for 30 years, the light wasnt bad, no spin either, second the light has nothing to do with the cars ET, mustang 5.0s are in fact slower than T/As LT1 or LS1 unless you swap the cam, intake, put headers on it etc.   
Also, in the quarter mile comparing apples to apples, a car with a 3.70 gear will out run the guy with the 3.23 gears.
Maybe it might make a diff. if you run it past a quarter but I doubt it will be much.
The length of the fuel rails doesnt play a part in the power band of an engine. Your TPI is not comparable to an LT1 or LS1 the design is not the same at all...especially not the LS1. I've got alot of race expirience....been around it my whole life, LS! cars are faster than 5.0s no matter which way you go....assuming you are comparing apples to apples.  

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06/26/2008, 6:10PM

no, pretty sure its an LS1, mustang had to have more than an MSD ignition system and a chip to beat it.

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07/03/2008, 11:04AM

Definitely a few good responsed up in here, but definitely a few people that don't know their ass from their elbow either!

The info provided from LS1tech & Nineball is dead on regarding hp and it being the same engine as the vette.

I have a 01 TA and I used to have a 90 GT. There is absolutely no way a stock fox body will beat a stock LS1 f-body unless the driver is retarded.

Were you guys running from a roll or from a stop? The fact that you're an automatic and have smaller gears doesn't help. With a few mods your TA can be a whole different animal... converter, exhaust, cam, gears and maybe some DR's should put you easily be in the 11's.

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07/04/2008, 3:35PM

I have a 98 trans am, automatic and I pull along with a new 5spd 07 mustang GT modded with huge intake, k&n
filter and programmer. I have a SSRA intake along with an slp lid and k&n filter, were door to door. I've raced
modded STi's and been door to door from a roll, bout 50 to 90. Them 5.0's are pretty much slugs unless you mod
the hell out of them, trust me then can be fast, theres a local 5.0 that runs 8's in the quarter.

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07/12/2008, 8:54PM

I have taken my LS1 Camaro Convert to the track many times, 13.7 @ 104
My buddy's lighter 98 TA T-Top runs consistant 13.4- 13.5, not sure of the top speed.
Niether car has any mods other than a K & N.