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  1. vertigasen

    4.10 Top End Q

    .Nightfire - was that in OD, or just 3rd?
  2. vertigasen

    Electric cutout to open headers?

    There are a lot of good people here, and some good information. Some people can be "prickish" at times, but just ignore them. If you have questions, just ask......someone will either have the answer, or point you towards it.
  3. vertigasen

    Engine 2001 Gt 4.6 Idle Rough And Will Not Stay Running

    You said you had pressure there earlier....between 40-50psi, then it would drop down. Is that not the case anymore? You should get a cheap, mechanical fuel pressure gauge, remove the schrader valve, and thread the gauge on. If you are seeing pressure, you are good. If there is no pressure...
  4. vertigasen

    4.10 Top End Q

    I think it is your tires dorking the whole thing up. With 3.27 gears, and 25.5" diameter tires (stock) 53 mph would be ~1400 rpms in 5th. Change to a 28.91" diameter tire, and 1400 rpms in 5th is ~60 mph. Problem solved. Get a hand-held tuner that will allow you to calibrate your speedo...
  5. vertigasen

    Engine 2001 Gt 4.6 Idle Rough And Will Not Stay Running

    The pressure building up with the ignition on is good. The pressure will drop off some , but it shouldn't just drop quickly to 0. If you try to start it, the pressure will probably go up a little more, until it starts. The PPRV in the fuel tank will keep some of the pressure on, so that when...
  6. vertigasen

    Electric cutout to open headers?

    Do you realize that you just replied a thread that is almost 7 years old? Welcome to the forums anyway :p
  7. vertigasen

    4.10 Top End Q

    With that HUGE rear tire, 5th gear @ 55 mph around 1600 rpms would be 4.10 gears. Here is the calculator. The TR-3650 gears for a 2002 GT are: 3.38, 2.00, 1.32, 1.00, and 0.62. (2001 GTs and Bullitt's had a .067 5th gear) The 275/55-17 is 28.91" tall. That is probably the tallest tire I...
  8. vertigasen

    4.6 Dohc Build

    Run 4.10s minimum. The 4v's love RPMS....so throw it at it. The stock 4v cams are not bad with blowers, but they are not optimal. I have heard good things about 4.75 stroker, haven't had personal experience with it. A little stroke and RPMs might not be a bad thing, especially with a...
  9. vertigasen

    4.10 Top End Q

    This makes it even more confusing. That is almost a 29" tire in the rear. To hit 150 at 5k rpms...you need to have a gear > 4.10s installed. Something isn't right here.......
  10. vertigasen

    4.10 Top End Q

    According to Ford, it is electronically limited to 150. That can easily be removed, but even with 410 gears, in 5th gear you will be able to reach 150. What gear are you in when you hit 150 @ 5000+ rpms? The calculators just do not add up to that regardless of 3.55 or 3.27. With 4.10s...
  11. vertigasen

    2003 Mustang Gt Help!

    The people above are correct. An o/r mid pipe would be your best and cheapest source of "power". The best "bang for the buck" and best "Seat of the Pants" increase are gears. Don't fear the gear, 3.73, 4.10s, or if an auto, even higher....like 4.30s. For the exhaust, a cat-back exhaust...
  12. vertigasen

    4.10 Top End Q

    An 03 GT should have 3.27 gears stock regardless of auto or manual. Ford has an electronic limiter that prevents you from going faster than that. Why you would ever need to go that fast.....idk. Is it an auto of manual? Regardless, you will hit the electronic limiter in either an auto or...
  13. vertigasen

    Engine 2001 Gt 4.6 Idle Rough And Will Not Stay Running

    Check the roll over switch in the trunk, the fuses for the fuel pump related items (F1.14, F2.32, and F1.26), and the power to the FPDM. Any of those could be the issue. If those check out, and you are getting power past the FPDM, then you need to check the pump. Drop the tank, and add power...
  14. vertigasen

    03 Rear Lights Rewire

    Is it jsut the brake lights, or do turn signals not work as well? If it is just the brakes, you should check the pedal switch, make sure it is working. What you need to do is get a multi-meter and start testing. The switch. The fuse junction. See if you have power in, and power out from the...
  15. vertigasen

    Engine 2001 Gt 4.6 Idle Rough And Will Not Stay Running

    Good luck! We were all "green" at one point, but we had to learn somewhere.
  16. vertigasen

    Engine 2001 Gt 4.6 Idle Rough And Will Not Stay Running

    Dude, don't worry about it. We will help all we can...... 1) You have a returnless fuel system, so you don't have a fuel pressure regulator. That is why I said check the fuel pressure, you could have a bad PPRV (positive pressure relief valve) in the fuel tank. It prevents pressure from...
  17. vertigasen

    Stalling Issues

    This is in the WRONG section. There is a section for 1979-1995s, including SN95 5.0s. You would probably have a lot better luck there. If I were an admin, I would move it for you. Sorry.
  18. vertigasen

    Engine 2001 Gt 4.6 Idle Rough And Will Not Stay Running

    Ok, this does not have a carburetor, it is fuel injected. The fuel is injected into the intake manifold where the intake runner meets the cylinder head. If there is fuel coming out of the throttle body, there is a HUGE problem because that is no where near where it is sprayed by the injectors...
  19. vertigasen

    4.6 Dohc Build

    9.5 Static compression really doesn't mean that much anymore. SCR can be an indication of what your peak cylinder pressures are, but DCR, or dynamic compression ratio will tell you more. You need to use a dynamic compression calculator to figure up the best combo for you. The cams you run...
  20. vertigasen

    4.6 Dohc Build

    Go read THIS. Really, you have 3 optoinsl. 1) If you want to go PD, and building the thing anyway, do the C heads and then throw a whipple on it. A used 2.3 whipple can be had for almost nothing these days. 2) If you want to stay with B heads, do a centri, or even a turbo. 3) If you...
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