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Timing Chain the Culprit???
#11
You can check the slack on the timing chain by removing the fuel pump and sticking your finger inside. The bad timing chain (loose or jumped) would not cause week spark but a host of other major problems, like pistons slamming into valves etc.

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason


[Image: 082-hot-rod-power-tour-2017-1970-1970s.jpg]
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#12
(04-23-2018, 03:12 PM)73pony Wrote: You can check the slack on the timing chain by removing the fuel pump and sticking your finger inside. The bad timing chain (loose or jumped) would not cause week spark but a host of other major problems, like pistons slamming into valves etc.

That's genius

Gas is for cleaning parts, alcohol is for drinkin, nitro is for racin
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#13
Studdley,
For checking the timing chain and gears for wear, I used to do this;
bring the harmonic balancer to a known point so you can see the degree markings on the balancer by having a rachet on the balancer and turning in the opposite direction of the running rotation.
record the degree marking and remove the distributor cap.
Now turn the damper, ever so slowly and record how many degrees it takes for the rotor to move.
In all the years that I worked at the dealership, I surmised that anything more than 6 degrees meant a worn chain and gears.
If one has strong hands, can usually move the crank pulley by hand, watch out for those fan blades!
Boilermaster
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#14
Studdley,
While you are checking for timing chain stretch and #1 cyl. at TDC re check how close your distributor rotor is to the # 1 cylinder on the distributor cap.
You could be off a tooth on the distributor.
Boilermaster
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#15
runninpony 
So...speaking of ohm readings on plug wires. Around how many ohm's should they read?
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#16
(04-24-2018, 03:25 AM)NOT A T5 Wrote: So...speaking of ohm readings on plug wires. Around how many ohm's should they read?

It would depend on if you have stock OEM style wires or performance wires. Performance wires should be around 50 ohms or less per foot. Stock OEM type should be around 3500 or so per foot.

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason


[Image: 082-hot-rod-power-tour-2017-1970-1970s.jpg]
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#17
Timing chain is like new and I've got good spark, so now what

Gas is for cleaning parts, alcohol is for drinkin, nitro is for racin
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#18
Make sure the timing is correct, and that it fires on #1 cylinder at the top of the compression stroke.

Make sure you are getting fuel into the carburetor, look down the carburetor while you open the throttle by hand and see if the accelerator pump is working and fuel squirts out of the nozzles.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#19
(04-24-2018, 08:27 PM)Don C Wrote: Make sure the timing is correct, and that it fires on #1 cylinder at the top of the compression stroke.

Make sure you are getting fuel into the carburetor, look down the carburetor while you open the throttle by hand and see if the accelerator pump is working and fuel squirts out of the nozzles.

+1. If you now have good spark and you checked and have good compression, I think you mentioned that earlier, all you need to go with it is fuel and the spark at the right time and it should fire.

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason


[Image: 082-hot-rod-power-tour-2017-1970-1970s.jpg]
  Reply
#20
(04-24-2018, 08:27 PM)Don C Wrote: Make sure the timing is correct, and that it fires on #1 cylinder at the top of the compression stroke.

Make sure you are getting fuel into the carburetor, look down the carburetor while you open the throttle by hand and see if the accelerator pump is working and fuel squirts out of the nozzles.

We got fuel, will have to look at timing again

Gas is for cleaning parts, alcohol is for drinkin, nitro is for racin
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