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  1. 0

    Why do Grand Prix try to race me?

    I also have a convertible. Maybe its the autopower 4-point rollbar that invites races.
  2. 0

    Why do Grand Prix try to race me?

    Aside from the Grand Prix, it seems that Chevy Z71 pickup trucks are gunning for me. Anyone else have this problem?
  3. 0

    So I got the car dynoed....

    I never dynoed my car while it was stock but I have seen dyno charts of those who have. The numbers are right around 208 rwhp for autos (20% power loss) and 218 rwhp for manuals (16% power loss).
  4. 0

    Why do Grand Prix try to race me?

    I found some times for the Grand Prix. The 2004 Grand Prix GT2 can run 0-60 mph in 8.1 seconds and the 1/4 mile in 16.2 seconds. The 2004 Grand Prix GTP Comp. runs 0-60 mph in 6.6 seconds and the 1/4 mile in 15.0 seconds. This is fast enough to beat most family cars but it hardly seems...
  5. 0

    Why do Grand Prix try to race me?

    I can understand where the GTPs might think they have a chance. But, why do the regular Grand Prix want to race, especially the older ones? When I oblige them, it's not even close.
  6. 0

    Why do Grand Prix try to race me?

    The GTP weighs 3583 lbs. (curb weight) and has a 3.29 gear ratio.
  7. 0

    Why do Grand Prix try to race me?

    The 2004 Grand Prix GT1 has a 3.8l V6 that puts out 200 bhp and 230 lb-ft torque. The GTP has a supercharger that puts out 260 bhp and 280 lb-ft torque. That's only a 30% gain with the supercharger. Anyone know the 0-60 mph time or the 1/4 mile time on the GTP?
  8. 0

    Why do Grand Prix try to race me?

    Anyone else have this problem? It seems that both older and newer Grand Prix hunt me down. Do they really think that they are competitive against a Mustang GT? All they have for an engine is a 3.1l V6. It's embarassing (for them).
  9. 0

    Stock 2004 dyno numbers

    This seems a little above average. A stock auto should dyno around 208 rwhp (20% power loss) and a stock manual around 218 rwhp (16% power loss). The K & N filter should add 1-2 rwhp. There is some debate on whether or not removing the air silencer adds any horsepower. I read an article that...
  10. 0

    Whats more restrictive???

    The stock catted h-pipe is by far more restrictive. Replace it with a hi-flo catted x-pipe or an o/r x-pipe to gain 8-12 rwhp. The car will become only a little louder. The stock mufflers, from what I hear, actually flow prettly well so there is little performance gain from replacing them.
  11. 0

    So I got the car dynoed....

    Keep in mind that autos dyno stock at 208 rwhp. That means that you've added 22 rwhp with your exhaust mods. Some intake mods should help bring up your horsepower.
  12. 0

    Anyone heard of the Marcos Mantis (4.6l)?

    I bought a book entitled, SUPERCARS. In this book it lists an independent car manufacturer named Marcos which went out of business in the late 70s but was revived in the 1980s. In the mid-1980s, they began using Ford motors in their Mantis. In particular, they installed the Ford modular 281...
  13. 0

    for those who arent haveing any header issues

    I see that you have an auto. That limits your choice of LT headers to Kooks, MAC, and Hooker. I bought the Hooker ceramic coated LT's and am very pleased with the looks, sound, and performance. Along with the matching o/r x-pipe, I gained 23 rwhp.
  14. 0

    decisions decisions

    Skip the catback exhaust. Not much for performance gains. Go with the 4.10s ($532); this is the best first improvement. You will also need a chip to recalibrate the speedometer. Even though it's not listed, go with an o/r x-pipe; good for 8-10 rwhp. Skip the MAC cold air kit and go with a K...
  15. 0

    Plenum Questions

    The Accufab tb and plenum are high quality pieces that always dyno a little higher than the competition. It is true that the 70 mm dynoed a little higher than the 75 mm but that was on an otherwise stock Mustang. Start adding performance parts and you'll be glad that you went with the 75 mm...
  16. 0

    Is it possible to get 300hp without boost?

    In hindsight, I should have started with the supercharger and then added bolt-ons as I was able. Right now, I've spent around $2100 in parts and another $1000 in labor. These bolt-on modifications added 42 rwhp (50 bhp) to the stock 208 rwhp (260 bhp) To go over 300 rwhp (380 bhp), I will...
  17. 0

    best Lower control arms?

    I have Steeda aluminum lca's. My car really hooks up. I didn't buy the adjustable lca's because I didn't think that I would use the different settings.
  18. 0

    Which Tuner: Superchips or Diablo?&Why

    Unless you have an expensive air/fuel ratio monitor, the handheld tuners are a waste of money. After you've completed you're bolt-on mods, buy a chip and have your car professionally dyno tuned.
  19. 0

    Need Help, 60 ft. times

    I put on some Steeda lower control arms. The car does not spin at all. It just hooks up and jumps out of the hole. I'm only putting out 250 rwhp, but I am also running street tires (Sumitomo).
  20. 0

    Finally, modding the 2001GT - Need tips!

    I agree. I went the other way, however. See the mods below. As a result, I spent $2100 in parts and another $1000 in labor. For my $3100, I gained 42 rwhp. For about $4000, I could have purchased a supercharger and gained 100-120 rwhp. Do the math. It's a no-brainer.
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