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post #1 of 6 (permalink) Old 05-19-03, 06:41 PM Thread Starter
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The V12 project

Lets say hypothetically you have been given a the top job in a project to build a V12 engine out of the i6 Falcon engine. The budget restriants are so that you can only really cast and change the block and the project must use standard VCT DOHC heads from ford. Ive heard of various engines being constructed using simular constraints (ie V8 motorbikes using two i4 heads).

Due to the applications being varible and vauge, the maxium amount of flexibility will be asked, preferably with diffrent stroke length variants being avalible, some as torquey cruisers and some as race engines and possibly some form of forced induction. Another request is that it can fit into the origional falcon engine bay, but a unique bonnet pressing can be made.

What stroke length would you design, out of what material would you cast the block, what areas would you change from the standard 4.0L block design (appart from being a V). Having to work with the basic heads, where would you modifiy them.

Does anyone have any information on the new I6's size, weight, and on the falcon engine bay size. Does anyone know if you would require Fords permission to design a engine around one of there heads?
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post #2 of 6 (permalink) Old 05-19-03, 08:14 PM
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You would have to mod at least one of the heads, or the ports would be on the wrong side. Either turn it around and add swap timing gear howsing to other end or cast a mirror of the other head.
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post #3 of 6 (permalink) Old 05-20-03, 04:07 AM
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The modular V8 is mounted about 4 inches forward from the windsor/I6 position, which is similar, to allow the DOHC heads to clear the firewall. You would have the same problems, but worse.

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post #4 of 6 (permalink) Old 05-20-03, 04:48 AM
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Someone in the Ford Oz empire should go and have a chat to Jaguar, to see what they did to merge two I6's together to form their V12.....

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post #5 of 6 (permalink) Old 05-20-03, 05:22 AM
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Get a welder and redesign the crank.... :)

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post #6 of 6 (permalink) Old 05-20-03, 09:06 AM Thread Starter
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I was thinking about the fact its on the wrong side..

You could flip the head around and well then you have issues with length as your adding a whole new lot of timming crap on the other side..or if you could move the timing gear on the head itself to the other side.. can it be done?

Or just leave it mounted on the wrong side, ok it would be a compromise, you couldn't have narrow V angle and double up on some things in the intake which would get all snakey oneside , but seems more workable. Getting a mirror head made up of simular quality would be extremely expensive, time consuming and costly for a small operation. Unless ford could do it, which would be pretty simple to mirror the current CAM design..

I was thinking about firewall clearance. If I shortend the stroke down to 92 or 80 mm I would clear up a fair bit of space, has to be a much nicer fit than the massive V8 stroke and the rest.. 105.8mm at 90 deg, 92 or 80 mm with a 60 deg would be much more practical.. a inch lower each side with it being much more narrow.. Dam it its gotta be close, given that its a big engine and such a operation may allow to free up other space in the bonnet area with moving electrics, batteries, that a normal manufactuer wouldn't normally approve etc etc..

Im thinking 7.4L DOHC, 48 Valve, Twin turbo, Quad VCT, V12.. It would be a bit more rev happy, adjust limiter to 7500 rpm, new cams, oh yeh.. Avalible in special custom bodied 4 and 2 door varients based off the falcon platform..
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