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Australian Falcons Discuss the australian born and bred models here. Includes the 80's 90's and present day Falcons offered by Ford Oz.

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Old 02-18-2003, 02:56   #1 (permalink)
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code on head

ok guys...i've asked this question before..and got no response...hopefully i can get one now...coz i really really wanna know...

i've looked at 2 other EA falcon engines...one a cfi..the other a mpi....both had 3.9 on the head....mine being an EA mpi....has only the code 91AB

my mums ED futura...has the code 91AA....

does anyone know what these codes mean??....
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Old 02-18-2003, 03:09   #2 (permalink)
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where is this code stamped?
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Old 02-18-2003, 03:31   #3 (permalink)
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umm....just under the rocker cover to the right hand side....i think...i'll try and get a pic.....

the ones i've seen with 3.9 have been to the left hand side...
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Old 02-18-2003, 03:51   #4 (permalink)
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i know where you r talking about
trying to finf info now
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Old 02-18-2003, 04:40   #5 (permalink)
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all i no is that the 91ab and the 91aa are the best heads to use if your going for performance
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Old 02-18-2003, 16:07   #6 (permalink)
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Alright, I have 3.9L 5 on the front.. the 5 might be something else, doesn't quite look like a 5

02 91 JB on the side just above front exhaust port
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Old 02-18-2003, 20:46   #7 (permalink)
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There are small differences between the heads from the EA-EF. The EF onward has a chamber set up for better high rev performance/flow. The Valves are all the same, however, there are some port differences in the heads. For best performance, the head needs to be matched to your compression ratio, and the type of manifold you have.

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Old 02-18-2003, 22:17   #8 (permalink)
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would the 91AB head have been fitted stock?

my car was labelled special edition...and had a body kit fitted...i was told the kit came from when the car was bought new

what makes the 91AB and 91AA heads so good?
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Old 02-18-2003, 22:55   #9 (permalink)
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91AB is just a part number. EA started with 87DA and went upwards from there The EF head I have is 94DA
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Old 02-19-2003, 02:34   #10 (permalink)
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The part number you describe is only useful to engineers.
91 represents the year the block was cast. The AA, AB etc is only a reference and Ford apparently do not use this as a reference at all
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