The Spearco system was the one suggested by David Vizard as one of the best around in the 70's and 80's. If you use the set-up as recommmended, it will work fine.
If you want it timed against the piezo electric knock sensor Aussie XF Falcon cars had, then you need to run it with a NAND gate logic sensor. Most good electronics people can set it up. They use the knock sensor on the leading head bolt which Ford Oz had on all Ford XF EFI sixes from July 1986 onwards. It is a stock head bolt on the front right of the vehcile, and it is screwed into the bolt. Since number 1 is least likely to knock, it is tuned to pick up on any impending knock at all. When the peizo feels the vibration from the cylinder going above a certain level, it closes or opens a circuit, stopping the Electronic Spark Timing delivering full advance the to ignition.
In the context of a water injection system, you have to set it up to poll that knock sensor on a constant basis. You just don't deliver any water to the carby(s) untill the piezo triggers. That modifiaction should work more easily than the vaccum set-up.
Regarding a triple carb set-up, just use the stock 121 Pinto jets for the Spearco set-up, and split them into 3 chokes. The stock set-up is geared for a 13 thou jet for about 100 hp. Three 13 thou jets would be able to douse a 300 hp torchdown. If you run Methonol and Water, it would be perfect.
The other option, at your own risk, is to use a 45 psi Ford Pinto washer bottle and make you own system. As long as its set-up to ensure it always gives water when the engine is knocking, and never at idle or when cranking the starter or something silly like that, then it will work.
The Aussie head bolt is quite cheap. It'll see if I can get a part number on it and the knock sensor. On a log headed US 200, it would need to be bolted to a special hardned steel washer to ensure the bolt seats as per the stock US bolt. The cross-flow ally head six has a deaper bolt, and if it was used, it may bottom out earlier than it should.
I'll check it out and get back to you. It'll take a week or so, but I can get a part number, and see if it fits okay.
If you want it timed against the piezo electric knock sensor Aussie XF Falcon cars had, then you need to run it with a NAND gate logic sensor. Most good electronics people can set it up. They use the knock sensor on the leading head bolt which Ford Oz had on all Ford XF EFI sixes from July 1986 onwards. It is a stock head bolt on the front right of the vehcile, and it is screwed into the bolt. Since number 1 is least likely to knock, it is tuned to pick up on any impending knock at all. When the peizo feels the vibration from the cylinder going above a certain level, it closes or opens a circuit, stopping the Electronic Spark Timing delivering full advance the to ignition.
In the context of a water injection system, you have to set it up to poll that knock sensor on a constant basis. You just don't deliver any water to the carby(s) untill the piezo triggers. That modifiaction should work more easily than the vaccum set-up.
Regarding a triple carb set-up, just use the stock 121 Pinto jets for the Spearco set-up, and split them into 3 chokes. The stock set-up is geared for a 13 thou jet for about 100 hp. Three 13 thou jets would be able to douse a 300 hp torchdown. If you run Methonol and Water, it would be perfect.
The other option, at your own risk, is to use a 45 psi Ford Pinto washer bottle and make you own system. As long as its set-up to ensure it always gives water when the engine is knocking, and never at idle or when cranking the starter or something silly like that, then it will work.
The Aussie head bolt is quite cheap. It'll see if I can get a part number on it and the knock sensor. On a log headed US 200, it would need to be bolted to a special hardned steel washer to ensure the bolt seats as per the stock US bolt. The cross-flow ally head six has a deaper bolt, and if it was used, it may bottom out earlier than it should.
I'll check it out and get back to you. It'll take a week or so, but I can get a part number, and see if it fits okay.
