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Thread: Top dead center for dummies........

  1. #1
    GMN Regular Toploader's Avatar
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    Default Top dead center for dummies........

    Ok, so tell me the easiest way to find TDC with engine in the car

    Thanks

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    Cheese Nazi phayzer5's Avatar
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    Thumb sealing the #1 plug hole, ratchet on crank turning engine over, feel for pressure to rise then stop when you feel the valve open. It's either tdc or 180° off
    Last edited by phayzer5; 01-09-2018 at 12:01 AM.

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    TDC is when both valvs are closed and #1 piston is at TDC and the way to find it is line up the timeming marks to TDC. Good luck.

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    drink a beer, grow a beard, cut it, grind it, weld it back His Royal Ghostliness's Avatar
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    What they both said. On the exhaust stroke the valve will be open and you won't feel much air trying to push your finger out the sparkplug hole. On the compression stroke with bolt valves closed, all of the air in the cylinder will wanna escape thru the passage blocked by your finger, it's pretty hard to miss or ignore. Then watch the balancer and line up the TDC (zero) mark with the pointer and you should be right on it.
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    Ok so...this is how I will go about it on my old Stude.....remove spark plug from #1 cyl, hook up my remote starter switch, place finger over plug hole, keep bumping starter until I feel the pressure wanting to push my finger off the hole, I may have to do this a second time as the pointer on the damper has to line up with the zero degree mark scale tag, just after I feel the pressure on my finger. I am not proud, if I do not have this correct...TELL ME!!! I have NYC skin
    Quote Originally Posted by His Royal Ghostliness View Post
    What they both said. On the exhaust stroke the valve will be open and you won't feel much air trying to push your finger out the sparkplug hole. On the compression stroke with bolt valves closed, all of the air in the cylinder will wanna escape thru the passage blocked by your finger, it's pretty hard to miss or ignore. Then watch the balancer and line up the TDC (zero) mark with the pointer and you should be right on it.

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    That should work fine.

    If I understand your plan;
    1) Find which is compression stroke
    2) Use mark to dial in exact TDC
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    That B my plan!!:-_)
    Quote Originally Posted by jaywish View Post
    That should work fine.

    If I understand your plan;
    1) Find which is compression stroke
    2) Use mark to dial in exact TDC

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    drink a beer, grow a beard, cut it, grind it, weld it back His Royal Ghostliness's Avatar
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    The plan is fine.
    The ones who accomplish true greatness, are the foolish who keep pressing onward.
    The ones who accomplish nothing, are the wise who know when to quit.

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    I'm an air-conditioned gypsy gadget73's Avatar
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    I would use a ratchet and turn the motor over by hand. It will be a lot safer and there is almost no chance of over-shoot since you can watch the timing mark come around. No idea what the Studebaker crank bolt is but its probably something decently large. A 1/2" ratchet will still do it.

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    Sadly there is like zero room to get a ratchet on the bolt......that is why I have to resort to the remote starter switch.Next to the Packard 352 block that the Golden Hawk carried, the Avanti engine is literally stuffed under the hood.Click image for larger version. 

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    Quote Originally Posted by gadget73 View Post
    I would use a ratchet and turn the motor over by hand. It will be a lot safer and there is almost no chance of over-shoot since you can watch the timing mark come around. No idea what the Studebaker crank bolt is but its probably something decently large. A 1/2" ratchet will still do it.

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    I'm an air-conditioned gypsy gadget73's Avatar
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    just make sure you remove the coil wire if you have to do it that way.

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    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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    pretty
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    More pics! I spot... a supercharger!
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    drink a beer, grow a beard, cut it, grind it, weld it back His Royal Ghostliness's Avatar
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    The blower was a normal thing for the Studebakers actually, may have been optional but certainly not a one-off type of deal like if you see one in say a Mustang.

    That said, this blower clearly feeds the devil, aka blow-thru carb. Evil them things are, evil! lol
    The ones who accomplish true greatness, are the foolish who keep pressing onward.
    The ones who accomplish nothing, are the wise who know when to quit.

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    That I will........after I remove all the SS ignition shielding Got to love the Packard 440 wires
    Quote Originally Posted by gadget73 View Post
    just make sure you remove the coil wire if you have to do it that way.

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    Royal, very true........after 1956 and the demise of the Packard foundry, Stude had to find an engine of the same HP.....(the 352 4bbl Packard was 275 bhp) so.......hello Robert McCullough chain saws and superchargers......the blower made the Stude engine have the same 275 bhp....albeit via a 2bbl Stromberg carb....the Avanti used one AFB and reduced compression of 9:1 to compensate for the blower boost. Underrated at 290 bhp out of 289 with 3.07 and or 3.31 final drive the cars had no problem reaching 150 mph.....there was the special R-3 and R-4 engines and the R-5,,,,,which went 197 at Bonneville. To me the Avanti was the first muscle car or pony car....of that era.
    Quote Originally Posted by His Royal Ghostliness View Post
    The blower was a normal thing for the Studebaker's actually, may have been optional but certainly not a one-off type of deal like if you see one in say a Mustang.

    That said, this blower clearly feeds the devil, aka blow-thru carb. Evil them things are, evil! lol

  17. #17
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    The carb was specially sealed to handle the blower pressure.
    Quote Originally Posted by His Royal Ghostliness View Post
    The blower was a normal thing for the Studebakers actually, may have been optional but certainly not a one-off type of deal like if you see one in say a Mustang.

    That said, this blower clearly feeds the devil, aka blow-thru carb. Evil them things are, evil! lol

  18. #18
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    Tiggy, I will look for some more..........love the sound of the blower when the RPMs rise and the expressway...........
    Quote Originally Posted by Tiggie View Post
    More pics! I spot... a supercharger!

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    Almost as pretty of the old Sicilian GF
    Quote Originally Posted by jaywish View Post
    pretty

  20. #20
    I'm an air-conditioned gypsy gadget73's Avatar
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    The Avanti is a much overlooked vehicle. Its also very much a love it or hate it style. I think they're incredibly cool. Studebaker also isn't so much a name that comes to mind for muscle cars, but the Stude Hawk was a right powerful car in it's day. Kinda an early entry into the big motor in a small car field, same reason that the Mustang, the Dart, and the Nova were hot shit at various points.

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    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

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    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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