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Type: Posts; User: V6Bob




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  1. I roadraced SCCA for years, some years back. ...

    I roadraced SCCA for years, some years back. Autocrossed for some years before that.

    These days I race simulations on the computer. They're plenty good enough to see what various suspension...
  2. It's actually pretty simple. "not the greatest"...

    It's actually pretty simple. "not the greatest" is a considerable understatement. It truly -----. Which is why running static negative camber doesn't solve the problem (but every little bit...
  3. It's hard to see a 3rd gen as inherently better...

    It's hard to see a 3rd gen as inherently better than a 4th gen. The geometry is not better, the camber curve of the McPherson strut front end is horrible, compared to the one for double a-arms.

    If...
  4. Lots. Quite likely too much. The two bars...

    Lots. Quite likely too much.

    The two bars have very different functions. The front serves primarily to limit roll in corners. On our cars, it has relatively little influence on the balance...
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    My local NAPA parts guy had no clue about how to...

    My local NAPA parts guy had no clue about how to order one, except something he found for $30. I don't really feel like going to the junkyard and messing around with this.

    At this point I'm ready...
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    Turn signal flasher - SOCKET problem

    2000 Firebird. I needed to replace my flasher. It was stuck in the socket, requiring substantial work with a screwdriver as a lever to get it out. Now the new one is very loose, I have it taped...
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    My first step would be to put a dial indicator on...

    My first step would be to put a dial indicator on the disk, and rotate it. I'd also try to do the same thing on the outside of the hub, although that surface is rough. Those two measurements should...
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    Some of us think it's fun. And helpful if you...

    Some of us think it's fun. And helpful if you race cars either on a track or on a computer. It does take study.

    A good intro is "Chassis Engineering" by Herb Adams. Excellent discussion of...
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    By George, he's got it . One reason is...

    By George, he's got it <smile>.

    One reason is that everything interacts with everything, and so theory has a hard time coping with reality. You can't consider one change in isolation.

    Jeff...
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    Not so fast. What you described sounds to me...

    Not so fast.

    What you described sounds to me like understeer caused by simply pushing the car into the corner too fast. "Slow in, fast out" is the rule. And the 19 can cause oversteer just...
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    In SCCA, anyway, only bolt on SFCs are allowed in...

    In SCCA, anyway, only bolt on SFCs are allowed in the lower classes. For most that means they can add SFCs, but for those (most) who had them welded in, no joy.
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    What psi is really complicated. It depends on...

    What psi is really complicated. It depends on the tires, your driving style, etc. Most people find something like 40-44, with more in the front than the rear, decent.

    But it really doesn't...
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    +1 There's also a minor possibility that it will...

    +1 There's also a minor possibility that it will mess up your handling balance, suspension parts are designed to work together as a package. When GM revised the front spring rates they did other...
  14. Thread: These on right?

    by V6Bob
    Replies
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    2,950

    Drilled rotors, subjected to high heat, can crack...

    Drilled rotors, subjected to high heat, can crack around the holes. Whether or not they will actually do so depends on:

    the drill size/pattern
    drilling techniques
    the exact metal used in the...
  15. Thread: struts?

    by V6Bob
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    Abraham Lincoln "How many legs does a dog have,...

    Abraham Lincoln "How many legs does a dog have, if you call a tail a leg? Four. Calling a tail a leg doesn't make it one."

    "Strut" is, for most people, short for MacPherson strut. A MacPherson...
  16. Thread: Brake cooling?

    by V6Bob
    Replies
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    2,356

    I went to a BMW "school" a few years back where...

    I went to a BMW "school" a few years back where we drove X5s around a track set up in a large parking lot. The BMW guy with me was mostly encouraging me to go faster, and deeper into the corner. It...
  17. Thread: Brake cooling?

    by V6Bob
    Replies
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    2,356

    Not much. They're pretty beefy, I don't think...

    Not much. They're pretty beefy, I don't think you can overheat them on the street. I suppose there's a theoretical possibility it would even be harmful, by directing road crap at them.

    Rotor...
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    There are certain jobs in life, where the hot...

    There are certain jobs in life, where the hot setup is to farm it out to the pro.

    Brain surgery, drywalling a whole house, replacing a rusted out exhaust, and replacing front shocks on an old 4th...
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    Don't think so. I'm pretty sure they popped up...

    Don't think so. I'm pretty sure they popped up on the tank of gas I left on the trip with.

    They wouldn't clear them. The guy said, if things returned to normal, the codes clear themselves. ...
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    Yep. Current plan (if I don't just ignore the...

    Yep. Current plan (if I don't just ignore the light). Put the rear on ramps, go under and check for exhaust leaks. There's nothing large enough to make noise. Maybe find a really serious fuel...
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    P0137, P0151, O2 sensor voltage low, which is...

    P0137, P0151, O2 sensor voltage low, which is lean (if it's not the sensor, or the wiring, or....).

    Without a symptom, I'm just guessing here. Maybe a pro putting the sensor on an oscilloscope...
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    It's amazing how many people worry about the...

    It's amazing how many people worry about the "trick setup" for suspension, when major improvements can be had by simply replacing things like worn bushings, in cars that are as old as ours.
  23. Thread: Coil springs

    by V6Bob
    Replies
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    1,715

    Depends on what you want. Aftermarket lowering...

    Depends on what you want. Aftermarket lowering springs will make the car look better to most, ride significantly harder, and handle a little worse.

    You should not use aftermarket springs unless...
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    The spec is 48-55, but I'm guessing that's with...

    The spec is 48-55, but I'm guessing that's with the vacuum hose disconnected. The fact that it jumped immediately 5 psi when I goosed the throttle indicates to me the FPR is working fairly well.
    ...
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    What I'm worried about of course. But I have no...

    What I'm worried about of course. But I have no faith that replacing the fuel pump will "fix it". The pressure is very close to spec. The car starts immediately. The whine has disappeared (treated...
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