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Old 08-25-2008, 05:34 PM
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Number 1 on Gm HEI cap

I know the firing order for a small block Chev. I just don't know the location of number 1 plug wire on the HEI cap. Does anyone have a picture of this?? Thanks.. Al

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Old 08-25-2008, 07:51 PM
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http://www.classiccarauto.com/impala...ng_order.shtml

Should be around 5:30 as your looking from the front of the motor.

The firing order on a SBC 350 V8 is...1-8-4-3-6-5-7-2. If you are planning to replace your ignition wires always do 1 wire at a time. The # 1 spark plug is the drivers side front of the engine. Trace that ignition wire to the distributor cap and you now have #1. The wires runclockwise. So the next wire in line would be #8 , the next will be #4 and so on.. If you already removed the wires and seem lost you can either look in a Chilton's manual and see the firing order in a picture diagram.
If all else fails try this. Remove the #1 spark plug. Remove the distributor cap. Put your finger on the spark plug hole that you just removed and turn the engine over slowly. Do this until the compression stroke comes up , you will feel air pressure at this point. Look at the timing indicator located on your timing chain cover. You should see a line scribed in the lower crankshaft pulley, line this up in the indicator pointing to 0 or TDC. You now have Top dead center. look at the direction that your rotor is facing. It will point to #1 on your distributor cap. The wire that plugs into the hole in the cap is now #1.
Good Luck

Last edited by Rubberman2003; 08-25-2008 at 08:51 PM.
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Old 08-25-2008, 08:19 PM
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See. I need a picture, because all of the wires were off the cap. The distributor was one that needed a computer. I put in a new HEI that doesn't. I took off the cap, and marked on the firewall where the rotor was pointing. When I put in the new HEI I lined it up with the same mark that I had on the firewall and set it in place. That is why I would like to know where number one is on the cap..
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Old 08-25-2008, 08:48 PM
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Found you a picture.

http://www.thirdgen.org/techboard/te...s-ahhhhhh.html

This thread contains the pictures you want.
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Old 08-26-2008, 08:56 AM
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Quote:
Originally Posted by APalusky
See. I need a picture, because all of the wires were off the cap. The distributor was one that needed a computer. I put in a new HEI that doesn't. I took off the cap, and marked on the firewall where the rotor was pointing. When I put in the new HEI I lined it up with the same mark that I had on the firewall and set it in place. That is why I would like to know where number one is on the cap..
Here is another picture. Left click on it for a larger view.
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Old 08-26-2008, 07:19 PM
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Thanks. I'll turn it over tomorrow after work to tind TDC. Then work from there.. Al
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Old 09-02-2008, 09:52 AM
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Number one can be anywhere on the cap that you want it to be, the motor doesn't care, but the standard is to have the rotor pointing at 5:30 O'Clock for firing number one cylinder (driver's side, front). This will allow the most rotational movement on the distributor housing for fine-tuning the timing without the vacuum cannister banging on the manifold somewhere.

Follow Rubberman's instructions for finding number one TDC on the firing stroke. If the rotor points somewhere else, pull the distributor and re-stab it so the rotor points to 5:30.
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Old 09-02-2008, 05:33 PM
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Thanks. It was pretty easy to find TDC. I just took out number 1 plug, and put that bolt back in and used a breaker bar to turn the engine over. The air wooshed out and I lined up the line on the balancer with zero on the pointer. I took off the cap and the rotor was pointing at the 5:30, or #1. cylinder. The wiring is done execpt for I am waiting for a Maxi Fuse to put between the solinoid and the fuse block. Thanks for all of your help.. Al
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Old 09-03-2008, 12:06 AM
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Your welcome
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Old 04-06-2013, 08:22 PM
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[QUOTE=Rubberman2003;1011230]Found you a picture.

HEI cap orientation - Chevelle Tech


This thread contains the pictures you want. number 7 sits just before the BAT/TAC connecting block with number 2 sitting on the other side, in other words 7 and 2 sit either side of the HEI wire connections. Going clockwise, distributor rotation, number 1 is the second post from the BAT connection.
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