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Old 04-08-2011, 07:32 PM
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tdc?

hey guys just a quick question. whats the best way to get tdc to set your distributor. is using a tdc tool that goes into the #1 cylinder and then once the piston hits you set the distributor there at #1? a guys at jegs told me that. alls this time ive been using the middle point between when the piston first comes up and the second it drops. when i used the tdc stop in the #1 cylinder, i noticed that the timing mark on my harmonic balancer wasn't at 0. when its at 0 degreese its what i was talkin about before by how its the middle point of the piston comming up and going down. any thoughts?

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Old 04-08-2011, 08:22 PM
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tdc

I have always used the middle point. how much off is the "o" mark on the balancer? I usually get the 2 different points and then mark the middle betwwen the two. the crank has that dead zone in the middle where it is rolling over the top, so that was my reasoning.
if the "o"mark on the balancer is off you should make sure to check the balancer. it could be just a bad pointer as well, but put a mark acrossbalancer from the middle to the outside, so both parts get marked. then after running for awhile shut it off and see if the mark looks the same. if it doesn't line up the outer ring is moving. usually the rubber looks a little squishy too.
good luck,
dsraven
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Old 04-08-2011, 08:26 PM
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the harmonic balencer is brand new for the 2 o'clock position.when used the middle spot, i had to advance the distributor as much as possible until the vacuum advance can hit the intake for it to even start. so im thinking using my tdc stop and setting it there is where it should be. i havent tried starting it yet tho.
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Old 04-08-2011, 08:28 PM
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http://www.crankshaftcoalition.com/w...op_dead_center
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Old 04-08-2011, 08:39 PM
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tdc

you can watch your valves go throught the process

on the ---intake manifold --- side for extra measure

if you cant see the mark on the balancer

so you know when its in correct firing order


tdc --top dead center


fire--ing order
you can check all aspects buy measure

usally the fine tuning that can be confusing
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Old 04-08-2011, 08:44 PM
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tdc

what you got
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Old 04-08-2011, 08:52 PM
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distributor set

I think I misunderstood what you were getting at, but if I am correct this time you are installing the distributor with a harmonic balancer that doesn't have the correct timing pointer?
get the tdc on #1 cyl just after the compression stroke. so #1 is ready to fire. some guys will mark a new spot on the damper at this point for future reference. or you can get a new pointer for your application. you can also get a piece of timing tape that can be stuck to your damper. what i like to do then is to back the motor up about 20 deg, then bring it up in normal rotation to the proper timing spec. say 8-10 deg. now take a look at the distributor and set it so your rotor is pointing at #1 spark plug tower. you may have to pull the distributor so it is in the right place. after all this you should be able to turn the key and it will start, but will require you to set the timing later when it is warmed up.
good luck,
hope it helps
dsraven
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Old 04-08-2011, 08:57 PM
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tdc

use the valves on the intake side if you cant find the mark

plus the compression stroke

so the the ability to find the a strip timing tape for the mark?
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Old 04-08-2011, 09:01 PM
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tdc

the exhuast valve will start to to go down after top dead center


so to timing tape to a mark or --white out --to the size of the damper---------------------- 8 inch 7 inch 6 inch ???????
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Old 04-08-2011, 09:19 PM
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tdc

mark by mark

by the valves?

any other problems like timing chain

or compression missfires bullhonky donkey like

ACORDING TO THE FIRING ORDER

Last edited by ruined344; 04-08-2011 at 09:30 PM.
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Old 04-08-2011, 09:54 PM
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ok....when i use a piston stop. the second the piston hit the stop isnt that tdc and i should set my distributor there?
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Old 04-08-2011, 10:02 PM
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Quote:
Originally Posted by PiperDavid14
ok....when i use a piston stop. the second the piston hit the stop isnt that tdc and i should set my distributor there?
No. And what this tells me is that after you asking me for help on your other thread and me giving you a link that will answer all your questions, you didn't think enough of me to read it.
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Old 04-08-2011, 10:04 PM
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i did, im just confused cuz then the dumb jegs guy has no idea *** he was talkn about. the link you sent basically told me to set it at 10 degrease advance and set your distributor thee for number one correct? the damper and timing tab are correct.
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Old 04-09-2011, 06:10 AM
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true top dead center is not something that can be kinda found by any external indicators.

real top dead center is found by dial indicator and removal of the timing chain cover.

everything else is a stab in the dark and will get it running but wont get you accurate timing.
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Old 04-09-2011, 10:16 AM
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tdc

if you are just trying to get the distributor installed, then being totally set at tdc isn't that big of a deal. get the thing set at 0, with your piston stop if that is what you want, or the timing mark on the vibration damper or whatever, drop in the distributor so the vac advance is where you want it, set the rotor pointing at the number 1 plug wire and tighten it down. start it up, let it warm up and then set the timing with a light. the suggested timing from the factory is for all over the country, from sea level in California to 6000 ft in Denver, so if you want to get your engine "tuned" for your altitude, humidity etc then you would need to go get it dyno'd after you get it running. they would do other adjustments at the same time as well, and check the total advance etc to make sure it isn't pinging or detonating etc etc. don't sweat it man, just stop researching the **** out of it and go do it. you'll figure it out.
dsraven
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