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About rex@rexshort.co.nz

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  1. Some things I have learned about early link ecu's and 4age 20v engines. When cranking the engine, if the Link says the rpm is several thousand you are trying to run with a 24 tooth distributor and it will not run. If it does, it will be so rich that there will be fuel dripping out the tail pipe and it will endlessly flood. Here is the modification you need to do if you want to run a early Link ecu on a 4age 20v. 20 teeth need to be removed leaving 4 at north south east and west. To work out which ones to leave set the engine at tdc (top dead centre) #1 with the rotor aimed at the lug in the distributor cap of spark plug lead #1. Then leave the first tooth that has just gone past the top sensor and paint it white. That is the north tooth so to speak. Because it runs a distributor cap the lower sensors do not need to be connected to the link 2nd lower trigger. These are only needed for multicoil setups. When you start the engine and put a timing light on it use the hand controller and enable the zero'd out base timing mode. Set the distributor rotation so that the timing mark reads zero degrees before tdc. This matches the actual distributor timing and link ecu timing. Don't forget to disable the mode you just enabled. Now the ignition timing is set from the table chart in the link. Hope you have enjoyed the read.
  2. I am needing to machine 20 teeth away from my 24 tooth 4age 20blacktop distributor trigger wheel. Andrew is my friend and he is a machinist. He is willing to put it in his mill and machine off the unwanted teeth. A bit of back ground to the issue. The LinkG1 ver5 is set up with a daughter board that needs to see a 4 tooth pickup. The link ecu I have just purchased was on a 4agze turbo rally car. I have put it on a 4age 20v Blacktop. Have a look at the picture attached and see I have marked with a red arrow the hall pick up that I am triggering the link ecu with. Just say this picture was of my engine at TDC #1. Nnote: I have removed the trigger wheel with a puller and I can put it back on as I please as it is not splined and is an interference fit. I also understand the rotor has to line up at Number one plug. Question 1: What does the link G1 Trigger 1 ecu input want to see? Question 2: Which teeth do I need to remove to get the link G1 to trigger correctly. Describe by colour. Question 3: How does the link G1 work out where TDC is? Question 4: When I press the trigger wheel back on with its four teeth shall I have it the tooth lined up right in the middle of the trigger or shall I have a bit of lead or lag? Just a little? Discribe in mm past or before. Question 5: Can I use the advance adjustment in the software that I have seen to adjust after base timing is set with timing light? Explain the process a bit. Thanks for all the shared knowledge.
  3. Here is an update on getting the Link G1 to run on my 4age 20v blacktop. When I put it on the car it just flooded like there was 20 times to much fuel. When I looked at the cranking speed it was in the thousands and this was not possible. I started to ask those who knew what was up and why this was happening. It turns out that the LinkG1 has a daughter board that bolts off the main board and this has to match the pickup in the distributor. Hence when it is looking for a 4age16v pickup with only 4 teeth and it sees a 20v reluctor wheel with 24 teeth the trigger pulse is 20 times to much per revolution. After talking again to those in the know the options are... 1. Make the 16v distributor fit the 20v engine (big mission!) or 2. Grind 20 teeth off the reluctor wheel and leave 4 teeth at north, south, east and west points and start the first tooth at tdc #1. So off to the wreckers today to get a second hand 20v distributor that I can remove teeth off. (I feel like a dentist). All going well this will take the confusing input signal away from the link and let it kick into life once more. Learned a lot. Hope this helps someone out there.
  4. Hi there. I am wiring up a Link G1 ver5 to a 4age 20v Blacktop. The distrubitor plug looks like this: Which terminals do I connect the link G1 to. Do I need to modify the internals of the distrubitor? Thanks Rex I have this diagram but need to mate it to this distrubitor. Thanks for any help. If you would rather talk my home phone is 06 756 8800 and Cel is 0220 435 947. Rex
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