Small block mechanical trivia ?

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69MOPE

69MOPE

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I already know the answer.
In the picture below, when the marks are lined up as shown you can then install the distributor aimed at number 1 on the cap.
True
or
False

99387_Graphic1_318.jpg
 
........... well I am 100% confused now..... If your at top dead center, why is the distributor in the middle of the firing order?
 
If the timing marks are set there the engine wont run if its a small block mopar your looking at a ford timing chain when the marks line up the lower key way would be at 2 oclock pos. but if your running a ford its a #6
 
False. Been there.... LOL!!! Years ago, and after working as a Ford tech.
 
The answer to your question as posed is 100% TRUE. You CAN install the distributor pointing to number one with the timing marks as shown, but the engine will be timed 180* out.

69MOPE said:
I already know the answer.
In the picture below, when the marks are lined up as shown you can then install the distributor aimed at number 1 on the cap.
True
or
False

99387_Graphic1_318.jpg
Click to expand...
 
fnaramore said:
........... well I am 100% confused now..... If your at top dead center, why is the distributor in the middle of the firing order?
Click to expand...

Because with the dots lined up like in the picture, the engine is not at TDC for number one. It is at TDC for number six. For the engine to be timed on number one, the cam gear dot needs to be at 12 o'clock and crank gear at 12 o'clock.
 
RustyRatRod said:
Because with the dots lined up like in the picture, the engine is not at TDC for number one. It is at TDC for number six. For the engine to be timed on number one, the cam gear dot needs to be at 12 o'clock and cam gear at 12 o'clock.
Click to expand...

correct...12 o'clock high
 
And it's a fantastic point. One that I have yet to find in ONE SINGLE service manual of any kind, ever.
 
So, if I rotate my dizzy 180* that will work right? Cuz I'm pretty sure I did my timing marks like shown
 
Remember the crankshaft rotates 2 times for every one revolution of the camshaft. Both #1 and #6 CYLINDERS are at TDC, but in this picture, the Camshaft is 1/2 through its rotation, and as such, #6 is ready to fire. Thus 4 stroke engine...Intake/Compression/Power/Exhaust.
 
To add some more mud to an already muddy subject, there are actually 2 points in the engine cycle that are called "TDC" (Top Dead Center)...one is right between the "Exhaust" stroke and the "Intake" stroke having both valves open slightly (overlap), and the other one is when a given cylinder is in firing position. At "TDC Firing Position" for #1 cylinder, both valves are closed and compression is at its highest. The dots on the timing gears will both be at the 12 o'clock, or "Straight Up" position. I'm purposely ignoring offset keys and such. In your diagram, cylinder #6 is in "TDC Firing Position".
 
This does not just apply to Mopars............Now for the second question...........what's the difference between the "traditional" Ford 289/302 firing order and a Mopar V8?
 
If you number the cylinders the same they are the same. Messes up a ford or chebbie guy if you mentally mumble the mope firing order while you' wiring one up. They call you all shades of stupid till it fires off.
 
67Dart273 said:
This does not just apply to Mopars............Now for the second question...........what's the difference between the "traditional" Ford 289/302 firing order and a Mopar V8?
Click to expand...

Ford. 15426378

Mopar 18436572
 
dartjack said:
If you number the cylinders the same they are the same. Messes up a ford or chebbie guy if you mentally mumble the mope firing order while you' wiring one up. They call you all shades of stupid till it fires off.
Click to expand...

wrjjol.jpg


is the correcto answer
 
67Dart273 said:
This does not just apply to Mopars............Now for the second question...........what's the difference between the "traditional" Ford 289/302 firing order and a Mopar V8?
Click to expand...

I stumbled across this by accident a few yrs. ago. As Dartjack said nothing at all if you number them the same as you number a Mopar (or GM).

BTW: I know you said "traditional 289/302" but just thought I'd mention there is one exception to a Ford 302. The HO version's firing order was 1-3-7-2-6-5-4-8, same as the 351 Windsor
 
fishy68 said:
I stumbled across this by accident a few yrs. ago. As Dartjack said nothing at all if you number them the same as you number a Mopar (or GM).

BTW: I know you said "traditional 289/302" but just thought I'd mention there is one exception to a Ford 302. The HO version's firing order was 1-3-7-2-6-5-4-8, same as the 351 Windsor
Click to expand...

That's right but you can change back and forth by changing the cam. I believe the 351's were that way before the HO 302s.
 
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