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How do you advance timing?
Topic Started: Feb 26 2010, 12:19 PM (1,635 Views)
Geogoslow
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Hey guys i had a simple stupid question. How do you advance your timing? The cam gear in non adjustable. Thanks

Oh i have a 96 geo metro
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Johnny Mullet
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Fear the Mullet

Cam timing and ignition timing are two different animals. What were you wanting to do?
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Nick
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Jack Of All Trades Master Of None

he said he'll start a thread or link to show us how Geogoslow
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Dallas


ignition timing - two 12mm bolts (usually) holding distributor in place
cam timing - no
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Geogoslow
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It was for making more mpg. Like how you guys say i advanced my timing 8 degrees. And i always thought you advanced your timing through an adjustable cam gear. and i get it now. you advanced your ignition timing and not your cam timing.

And ooh. U do it through the distributor cap? I always heard that is didnt work like that.
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Bad Bent
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Facetious Educated Donkey

Well, if I may, as I understand it my new 3 Tech cam is designed to add more air and fuel. That makes for a bigger boom. :D
My 3Tech cam gear closes my intake valves a little sooner so the full compression can be achieved a little sooner.

Now, as I envision it... the timing belt connects the drive shaft with the cam shaft/gear on one end. The other end is the distributor/rotor/Crank Position Sensor. So as the piston approaches Top Dead Center (TDC) the cam shaft is rotating the rotor to the distributor cap post. The ignitor/Crank Position Sensor "senses" one of 3 small lobes on the cam shaft and fires the coil at 8o Before Top Dead Center. Magnetics and electric fields are magic. :smackface

Rotating the distributor body rotates the distributor cap/post, the ignitor and Crank Position Sensor so it "senses" the lobe (the crank is approaching TDC) either sooner (advanced) or later (retarded). "That's my story and I'm sticking to it." - Colin Quinn
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Geogoslow
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Thanks good info. I Understand all the timing stuff now. I just heard from my shop teacher that adjusting the dist cap did nothing for timing.
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Coche Blanco
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Geogoslow
Feb 27 2010, 01:06 PM
Thanks good info. I Understand all the timing stuff now. I just heard from my shop teacher that adjusting the dist cap did nothing for timing.
It won't change cam timing, but it will change ignition timing, making it spark sooner.

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Dallas


Geogoslow
Feb 27 2010, 01:06 PM
Thanks good info. I Understand all the timing stuff now. I just heard from my shop teacher that adjusting the dist cap did nothing for timing.
you arent adjusting just the dist cap, you are adjusting the distrubutor as a whole. its insides spin with the camshaft, and the outer housing needs to be secured to the motor somehow, by rotating the housing you are not rotating the rotor inside it. it is physically secured to the camshaft, and without the motor turning, the camshaft is not turning. so you adjust the "timing" of the rotor coming across one of the terminals that fires a spark down the wire to the plug, in terms of degrees of rotation
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