timing

[yoshi]

It's a new EZ wiring loom

[1project2many]

Do you have an alternator in the truck? If the wire to the coil+ is the same size as the large alternator wire then it will work.

[OrrieG]

EZ has the right size wire for HEI dist from switched ignition source.

[enaberif]

TDC is when the #3 intake valve is fully open. This means that your 0 on the pointer should be lined up with the cut line on the harmonic balancer. IF this does not line up your harmonic balancer maybe worn and not showing correctly.

You should either have an adjustable timing light which it sounds like you do or install a timing tape as well.

Pull the distributor out and then find TDC #1. When your at TDC #1 go slightly past till the mark on the harmonic balancer is at the 10 degree number. At this point reinstall the distributor and ensure the rotor points to the #1 cylinder. This is called Base Timing.

Your truck SHOULD start and run just fine. From here you can adjust your base timing and SBC may like between 8-14 degrees depending on your truck and motor setup.

Once you have your base setup then adjust the idle to 3000 RPM and then see what your truck is running for timing. It should be in the 33 degrees range if everything is proper.

Then what you want to do is subtract your BASE timing from the all in timing meaning if your base is 10 degrees subtract that from 33 to give you 23 degrees. The 23 degrees is what you need to recurve your distributor to with the different springs.

Make sense?

[octanejunkie]

Buy this book: http://www.themotorbookstore.com/978...FVSSfgod74gA2w

It's all in there

[1project2many]

Originally Posted by OrrieG

EZ has the right size wire for HEI dist from switched ignition source.

Thanks, Orrie. Sounds like it's just a matter of getting quality spade terminals (the right connector would be nice as well).

You do not want this type of spade terminal:


This terminal only makes contact with the spade in a few places and the only tension to keep the terminals together is provided by the shape of the rounded "sides."



You do want this type of terminal:


The flat tab inside the terminal provides much better contact with the male spade and there's a dimple which helps lock the terminal onto it's counterpart in the distributor. You can find some terminals constructed similarly but without the locking feature. Without the matching plastic connector, I'd use the locking variety.

The proper connector is available from several sources although I don't know where you could get it locally. Search for HEI Pigtail online.

[enaberif]

HEI Pigtail Repair Kit Part # F50001 from Napa or lots of places. Comes with the lead for the power and tach.
http://www.rockauto.com/dbphp/x,cata...TS_F50001.html

[1project2many]

enaberif... OP is in the UK. Is NAPA in the UK?

[enaberif]

Not sure hence the RA link as well.

[yoshi]

This is what I've been advised to do- find out from TSP when maximum advance occurs, mark the balancer at 36deg, drop dizzy in & set to 12deg. Whatever rpm TSP says max advance occurs set rpm to that, then move dizzy so marks line up at 36deg. Any thoughts? Thanks

[Speedbumpauto]

reasonable way to do it. I don't know who TSP is, but assuming it's the distributor manufacturer. After setting by your method, I'd blip the engine a little higher with the light on it to make sure what is said works out with what is happening.

[yoshi]

Is this what I need to mark the balancer - http://www.ebay.com/itm/390980330956

[Irishbleueyes]

Originally Posted by yoshi

Is this what I need to mark the balancer - http://www.ebay.com/itm/390980330956

Yes, if you have a 8" pully

[enaberif]

Originally Posted by yoshi

This is what I've been advised to do- find out from TSP when maximum advance occurs, mark the balancer at 36deg, drop dizzy in & set to 12deg. Whatever rpm TSP says max advance occurs set rpm to that, then move dizzy so marks line up at 36deg. Any thoughts? Thanks

Trying to mark a moving target with all that hardware in the way will not be easy. Don't worry about max advance as that is what the timing tape is for.

[yoshi]

Yes TSP is the manufacturer & replied to me saying 3500 rpm is max. I thought I'd use the tape to mark the balancer while the engine isn't running

[enaberif]

Originally Posted by yoshi

Yes TSP is the manufacturer & replied to me saying 3500 rpm is max. I thought I'd use the tape to mark the balancer while the engine isn't running

You won't be able to mark the tape for 36 degrees because when you stop the engine it'll never stop in the same spot.

The timing tape is designed so that you can see where your timing is when the engine is running.

[1project2many]

Trying to mark a moving target with all that hardware in the way will not be easy.

And

Originally Posted by enaberif

You won't be able to mark the tape for 36 degrees because when you stop the engine it'll never stop in the same spot.

The timing tape is designed so that you can see where your timing is when the engine is running.

If the tape is applied properly all you have to do is make a mark on the balancer at 36 deg. Technically once you have TDC marked properly you could measure the linear distance and make a mark without the tape.

Measure balancer diameter, multiply by pi, divide by 10. A balancer that measures at 8" is 25.128 inches around, with 36 degrees equal to 25.13 / 10 or 2.51", just a hair over 2 1/2".

[yoshi]

I think it's an 8" balancer

[1project2many]

I caught that and corrected my post. You should measure across it just to be sure. I can calculate metric dimensions if needed.

[enaberif]

Originally Posted by yoshi

I think it's an 8" balancer

LOL always double check.. My SBC 350 had the smaller balancer on it so I upgraded it to the proper one.

[yoshi]

Just found receipt for marker it is 8"

[yoshi]

Ok many thanks for that, so I'll mark the balancer 2 33/64" to the right of the tdc mark.

[enaberif]

Originally Posted by yoshi

Ok many thanks for that, so I'll mark the balancer 2 33/64" to the right of the tdc mark.

You would be better off just checking to see what maximum mechanical advance your distributor has at 3000 rpm.. You may find it has less or more than the 36 degrees.

[1project2many]

Ok many thanks for that, so I'll mark the balancer 2 33/64" to the right of the tdc mark.

I'd mark on the low side. The greater the distance, the more advance you're building in. And you really should measure across the balancer to get the actual diameter. If the balancer is smaller than 8" your mark will be too far advanced.

[1project2many]

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