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    car times slower after mods

    The GTech is not the greatest 1) Maybe your throttle body is too big. I know there is a school of thought that says you can't have them too big, but if you're trying to maximize total area under the dyno curve, that's not necessarily true. You really want the smallest throttle body you can...
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    DOHC vs. SOHC

    The 4.6L DOHC heads really do have great breathing potential. The 4.6L SOHC heads breath well enough, but nothing like the DOHC heads. That said, I think that DOHC as a general concept is pretty dumb. Why use 32 valves to make 320HP when a 16V OHV Chevy motor (or a Ford 302) can make that...
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    Mods that can improve gas mileage?

    I wouldn't recommend that, unless you change the heads too. The ports are very different between the PI and non-PI manifolds. The result will probably be a poor matchup between the heads and the manifold. Am I wrong about this? If the engine is making more power, it will be moving more air...
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    Edelbrock: "we can't make power..."

    There is probably some truth to what the Edelbrock man said. If Ford could only find 5hp with the Bullitt intake, why should we expect Edelbrock to do any better? And the Bullitt intake is a pretty radical change from the regular one... Edelbrock will want to make something that matches the...
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    Official Tremec 3650 Issues Thread

    I wouldn't worry about the clunk unless you have transmission grinding. I would worry about grinding but (as I have posted several times before), I would look at easy fixes first, like changing your motor mounts or making sure your shifting technique is correct. The driveline clunk is...
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    real electric supercharger?

    I saw this issue addressed in a magazine once. It boils down to a physics problem... every time energy changes form, there's an efficiency loss. An electric supercharger would involve changing mechanical energy (from the crank) to electrical energy and then back again. That results in large...
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    Coolant Temp. Switch / Fan Relay

    I am having trouble with the electric fan system on my '85 Mustang 2.3L. It does not seem like the coolant temperature controlled switch is working correctly, even though it is brand new. This is the switch that threads into a hosepipe running along the right (passenger) side of the camshaft...
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    Coolant... should I change it?

    Thanks a bunch. I absolutely agree that people don't give Ford enough credit for knowing the car. I am among the few people who has ever pointed out the logic behind the selection of the 3.27:1 rear-end ratio. BUT: 1) I don't think watching the temperature gauge will help me. My car...
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    Is 70k Miles Too Much For an '01 Auto GT?

    While you're at it, check for rear-end whine when coasting down in speed. The downshift clunk is not a big issue IMHO. The motor mounts on these cars are made of Silly Putty... BFD.
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    Is 70k Miles Too Much For an '01 Auto GT?

    Probably so, and the car will be much more consistent and easy to drive than a 5-speed. On the other hand, a really good driver can get some surprising times out of the 5-speed version. I would say those mods are worth about 0.3 - 0.4 seconds in the quarter, and will make your car faster than a...
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    Coolant... should I change it?

    My 2001 GT is almost 3 years old now. So my natural inclination is to change the coolant. However, I am not sure I want to, for several reasons: 1) It's still bright green in the recovery bottle (seems significant). 2) It's not time yet according to Ford (may not mean much). 3) I don't want...
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    Is 70k Miles Too Much For an '01 Auto GT?

    Again, that is what I think is important. Edmunds.com, among others, gives prices adjusted for mileage. My '01 GT has less than 19,000 miles, and according to Edmunds that's worth about $1000 compared to typical mileage. I would probably try and get this car (maybe working the price down...
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    Is 70k Miles Too Much For an '01 Auto GT?

    Depends on your perspective. Personally, I would be embarassed if I had put those miles on. If you really need to put 25,000 miles per year on a car, get an old Caprice or something. Don't drive a 2001 Mustang GT into the ground like that. On the other hand, I think that the 4.6L motor will...
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    Replacement Interior Parts - Where to get?

    Yup, that is a very useful site. Thanks a bunch. I think they have what I need... but the only colors they stock are (supposedly) "black" and "parchment." I would not exactly describe the color of this part as "black." But I also believe there may only be two colors for this piece for 2001...
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    Replacement Interior Parts - Where to get?

    Thanks, they did have the armrest piece and it was only $29. As far as I can tell, they only have the other piece (the one by the radio) for '94-'98 models. Oh well...
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    Replacement Interior Parts - Where to get?

    I want to replace a couple of plastic interior trim pieces on my 2001 GT: the piece that surrounds the radio, centermost A/C vents, and three switches; and the armrest area on the passenger side door. Does anyone know where I can get these? Can the dealer provide them? I tried Dave's Mustang...
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    Optimal Shift RPM

    On the street, I shift around 2000 RPM until the temperature has reached the middle of the gauge. After that, I generally take her up to about 3000 RPM before shifting. At the track, or any time I want full acceleration, I wait until 6000 RPM until I shift. The 4.6L really does not come...
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    I got a Lawyer for us on the Tremec 3650

    :lol: What did you run stock? And what did you run with your mods? I checked your mod list and I don't see anything there that's worth more than a tenth in the quarter, or maybe two at the absolute most. Maybe you are one of those people who buys a fast car and then just drives it on the...
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    Found the problem with my car. Its strange one.

    My advice is to put the timing at 15 degrees and run Chevron 91 like most people do. That is a combination that is known to be safe and effective. Weather and track variations could explain the lack of wheelspin on the 1-2 shift. So could bad gas. You can't say scientifically that your car...
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    Emissions... there has to be a better way

    Trinity: I do understand the science behind the emission control currently in use. I do not doubt the physics and chemistry behind them. I doubt the economics, especially when it comes to catalytic converters. Take another look at the math I originally posted... if Mustang owners alone are...
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