04-06 Engine Tech LS engine tech center. Get the most out of your car here. |
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07-10-2007, 05:25 PM
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Junior Member
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Join Date: Jun 2007
Posts: 7
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Best Performance Increase
What would the best bang for the buck to increase the performance of an 04' GTO,
without compromising the integrity of the engine, or exhuast?
1) nitrous oxide kit (how much $$ to refill the bottles)
2) heads / cams pro performance package
3) cut out mufflers only and replace with straight pipes
4) reprogram factory computer settings with an SLP Predator
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07-10-2007, 07:50 PM
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Ultimate Warrior
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Join Date: Dec 1999
Location: Pugetopolis
Posts: 5,297
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Best bang for the buck is definitely going to be nitrous. No other mod you've mentioned is going to add 150+ horses at anywhere near the cost of a nitrous kit.
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'72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car!
'73 Firebird 350/4-speed Black on Black, mix & match.
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07-10-2007, 11:20 PM
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Suspended
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Join Date: Oct 2004
Posts: 85
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1. 4. 3. 2.
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07-11-2007, 06:52 PM
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Ultimate Warrior
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Join Date: Jun 2003
Location: Clayton, CA
Posts: 2,887
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What exactly do you mean by compromise the integrity of the engine or exhaust? Pretty much everyone you listed has the potential to do so in some way.
Personally I'd start with headers and a cam. You can get a fair amount of horsepower there. Both of those require a tune too. Heads too if you have the money, but you'll get the most bang out of the first two.
SLP Predator will maybe get you 5-10hp. Check into getting a dyno tune instead. It costs about the same and will net you more. FWIW, I netted a whopping 5hp from my Superchips tune. That's with shorty headers, high flow cats, a cat back, ported throttle body and a cold air intake.
Nitrous will get you the most gain, but if you are going to run nitrous do you homework on the setup and get a specialized dyno tune to account for the nitrous shot. Plenty of folks have blown their engine without proper tuning. It pays to be careful.
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Ken
'68 GTO - 464 - Ram Air II heads - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac ( build thread | walk around)
'95 Comp T/A #6 M6 - bone stock ( pics)
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08-19-2007, 11:12 AM
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Senior Member
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Join Date: Jul 2003
Location: NY
Posts: 129
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Magna Charger supercharger. The car will still drive as good as stock and still get 25mpg until you get it under boost, and then listen to the whine and hold on!!! I love mine.
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08-22-2007, 11:56 AM
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Ultimate Warrior
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Join Date: Dec 1999
Location: Katy,TX USA
Posts: 20,831
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A computer tune will make a BIG difference in even every day driving. If it's an auto getting rid of the darned TM makes it ALOT more consistent and even chirp the 1-2 shift.
Might not add alot of HP but will improve the driveability and make it feel faster.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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08-22-2007, 06:01 PM
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Ultimate Warrior
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Join Date: Mar 2004
Location: Winneconne, Wisconsin
Posts: 5,416
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What's a TM? I have an '04 GTO and it chirps the tires on the 1-2 shift. Nothing was done to the car since it left the showroom except oil changes.
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BONESTOCK GOATS
'64 GTO Tripower Hardtop (Wife's Car)
'64 GTO Tripower Post Coupe (My Car)
'99 Bonneville SE Sedan
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08-22-2007, 06:36 PM
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Senior Chief
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Join Date: Jan 2004
Location: PA
Posts: 475
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torque management.
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09-30-2007, 12:12 PM
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Senior Member
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Join Date: Jun 2006
Location: Southeast PA
Posts: 154
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Quote:
Originally Posted by Gary Drexler
What would the best bang for the buck to increase the performance of an 04' GTO,
without compromising the integrity of the engine, or exhuast?
1) nitrous oxide kit (how much $$ to refill the bottles)
2) heads / cams pro performance package
3) cut out mufflers only and replace with straight pipes
4) reprogram factory computer settings with an SLP Predator
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With these choices the only one to not compromise the engine or exhaust is the Predator.
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2006 GTO IBM/Black M6
1969 GTO PHS #'s match sold, good riddence
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09-30-2007, 10:47 PM
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Moderator
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Join Date: Dec 1999
Location: Port Charlotte, Florida
Posts: 8,691
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I'd do a heads and cam with headers with a quality tune from a shop.
Then if you want/need more power add the bottle or a blower/turbo setup. But a head and cam combo will sound great, run even better and put a large smile on your face with out having to fill up a bottle every other day.
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