GT Performance Mods 2005+ Mustang GT Performance and Technical Information

What mods do I need to compete with a GTO?

Old Aug 25, 2007 | 09:02 AM
  #1  
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What mods do I need to compete with a GTO?

All right guys, a guy at work has 2006 GTO (manual) and my boss has a SRT8 Charger (auto). Both are stock but the GTO is supposed to get a K&N CAI in a couple of weeks.

My car is a 2005 GT (Manual)
Mods: C&L No tune insert CAI intake, flow tech Axle backs, MMR TB spacer.
Detractor mods: 20 chrome rims (could re-install my 17" for racing), Roush rear springs.

What do I need?

Thanks!
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Old Aug 25, 2007 | 09:17 AM
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i say go back to the stock rims with some Nitto 555R tires, and get a tuner, SCT is awesome and Bamachips has great tunes, you will be smoking that SRT8 and some 4.10 gears will help with that GTO or 3.90 gears if you have an auto
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Old Aug 25, 2007 | 09:34 AM
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07 HOSS Mustang's Avatar
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Remember: There is always someone with something faster than what you have........always
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Old Aug 25, 2007 | 09:59 AM
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If you were driving a C6 Z06 and you told someone you got beat by a modded Cobra they'd still say nice death. 25 years from now the GT500 will be sought after because it has the Shelby name, the 03-04 Cobra will be sought after because it was a performance monster.

That said, I still like Cobras, they taste just like chicken. LOL
(quote from the "kill stories" on the GTO forums) i think you need the 03/04 cobra those guys have respect for the terminiator
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Old Aug 25, 2007 | 10:14 AM
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more cubic inches
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Old Aug 25, 2007 | 10:19 AM
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on the 17s with a good launch you can take them both out of the hole from a dig. but it depends on how far you are going.

you better do your damage early - that GTO (6.0) will reel you in fast and the charger will finally walk you - she's heavy but that 425 hp will eventually do its work
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Old Aug 25, 2007 | 10:21 AM
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281GT's Avatar
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Reddragon777 pretty much nailed it. I can't stress enough the importance of traction and 20" wheels are horrible for that. A 20" wheel uses a tire that has virtually no sidewall flex and those rims are heavy. The absolute WORST place you want any extra weight is in the form or rotating mass so put the stock wheels back on and get the Nittos.
Depending on your budget a single peice aluminum driveshaft will remove another 18 - 20 lbs from your rotating mass but do the other stuff first and you will have NO problem taking out the Charger. The GTO will be a greater challenge but you should still be able to do with these mods.
Good luck!!!
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Old Aug 25, 2007 | 11:45 AM
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Definitely get a good tune on there first off. 4.10 gears after that assuming you're racing from a stop.
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Old Aug 25, 2007 | 12:00 PM
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Tune, gears and some lcas should do it. I assume you are racing from a dig. At the track, the GTO's struggle because of their IRS. If he is not running drag bags, you can take him on a dig. Especially if you are running some after market LCA's.
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Old Aug 25, 2007 | 12:00 PM
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Yes my car is a manual, if and when we do race it will be 1/4 mile, from a stop of course.
Thanks for the advice!

EDit: it would be at firebird raceway (a track)
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Old Aug 25, 2007 | 12:05 PM
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Switch to your 17 inch stockers all the way around, less rotating mass. Put your fronts at full psi, and your rears around 25psi. Launch at around 1500 (asumed you are running streets here) and power shift through the band. Stock if he can hook, he will probably run a mid-low 13 second pass.

you may want to unbolt your front sway bar as well.
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Old Aug 25, 2007 | 12:48 PM
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IMO you're going to have to pray that neither of them can drive. Both of those cars are capable of around a 13.0 bone stock, and trap in the high 100's. That's a bit more than our GT's are capable of. Even with a CAI / Tune you'll only be trapping around 105-ish, not nearly enough to out-muscle either of those cars in the 1/4 mile.

Actually I just noticed that the SRT-8 is an auto. That guy doesn't even have to worry about being able to drive lol.

I may appear to be a pessimist, but I think I'm the only one in this thread being a realist so far...
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Old Aug 25, 2007 | 12:55 PM
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As was said, those 20s are really hurting you. I put some (heavy) chrome steel 20s on my Charger when I first got it. I didn't like them as well as I thought I would, and went to the forged SRT8 factory wheel. It's also a 20, but much lighter. I could tell an immediate difference in the off-the-line performance. It was taking a lot more power to get those steel wheels turning.

Anything you can do to reduce the load on the engine is "free" horsepower. I like to call it "apparent horsepower", since you are not really increasing the horsepower of the engine, but you are increasing performance by reducing the engine's work load. Lightweight wheels, aluminum driveshaft, aluminum flywheel, underdrive pulleys... these all free up some horsepower with no mods to your engine.

Gears and a tune will be a necessity if you hope to take out the GTO.
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Old Aug 25, 2007 | 12:59 PM
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A kennebell.
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Old Aug 25, 2007 | 01:09 PM
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yea, go FI and you wont have to worry about either of them.....
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Old Aug 25, 2007 | 01:32 PM
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Originally Posted by titanjc
IMO you're going to have to pray that neither of them can drive. Both of those cars are capable of around a 13.0 bone stock, and trap in the high 100's. That's a bit more than our GT's are capable of. Even with a CAI / Tune you'll only be trapping around 105-ish, not nearly enough to out-muscle either of those cars in the 1/4 mile.

Actually I just noticed that the SRT-8 is an auto. That guy doesn't even have to worry about being able to drive lol.

I may appear to be a pessimist, but I think I'm the only one in this thread being a realist so far...
You are right, they are fast cars. Thier 1/4 mile stock ET's are according to the GM sales literature. They are fast cars, and I do respect them. But I have yet someone in a bone stock GTO hook at the track (they tend to spin due to thier IRs). In talking with Firestang70 (a GT owner), he has said pretty much the same thing and has taken them down with his bolt on GT (runs 12's).

SRT8's are heavy, the fastest one I saw at the track ran a 13.5. Not sure what they do with bolt ons.

I'm just basing it on what I've seen so far, there are quite a few of them around my area.
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Old Aug 25, 2007 | 01:40 PM
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Another reason not to have BIG wheels.
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Old Aug 25, 2007 | 01:44 PM
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a ferrarri should do it easy.
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Old Aug 25, 2007 | 01:48 PM
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You would be surprised. A lot of ferrarri's run 12's off the lot, they are not built to race from a dig (1/4 mile).
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Old Aug 25, 2007 | 02:25 PM
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Originally Posted by titanjc
IMO you're going to have to pray that neither of them can drive. Both of those cars are capable of around a 13.0 bone stock, and trap in the high 100's. That's a bit more than our GT's are capable of. Even with a CAI / Tune you'll only be trapping around 105-ish, not nearly enough to out-muscle either of those cars in the 1/4 mile.

Actually I just noticed that the SRT-8 is an auto. That guy doesn't even have to worry about being able to drive lol.

I may appear to be a pessimist, but I think I'm the only one in this thread being a realist so far...

I better pray that I can drive, lol. I am not much of a racer and it wasn't even my idea. My boss has a lead foot and whats to race all the time. He wants us to meet at the track for Friday night drags. I just don't want to show up and emabarass myself . When I was young and stupid I would always miss a gear, so I may be the worse driver of the three, I'm hosed!!
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