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Old 04-13-2004, 16:46   #1 (permalink)
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Cheap high performance engine combo

i was wandering what could be done the ea-au 6 bottom end to give it more grunt.

eg i have an ea 3.9 (stock bottom end) is there anything i could buy to make her a tad quicker like later model crank or later model rods ? anyone experimented with different combos of crank/rods/pistons in the ford 6 ?

i would be interested to know what some of you have done
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Old 04-13-2004, 17:06   #2 (permalink)
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Re: Cheap high performance engine combo

one combo would be..

ed crank, ea 3.2lt rods and pistons from acl to suit, they may already make pistons to suit 3.9 crank stroke and 3.2 rod length, if not, pistons from the acl cataloge that are ment for the 200 rods in the 250.

should increase max rpm by 750rpm easy.

cheers.joe.
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Old 04-13-2004, 17:11   #3 (permalink)
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Re: Cheap high performance engine combo

so the same sort of things the people do to the old 250 crossflow (200 rods)
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Old 04-13-2004, 19:22   #4 (permalink)
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Re: Cheap high performance engine combo

Joe,

are the EA 3.2 rods longer, in the way that the Au ones are?

David
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Old 04-13-2004, 19:45   #5 (permalink)
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Re: Cheap high performance engine combo

So were looking at a feasable 6500-7000rpm? Hmmm interesting... :s6:
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Old 04-13-2004, 20:02   #6 (permalink)
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Re: Cheap high performance engine combo

3.2 rods are 20mm longer, i dont think you could find a pistion with the pin high enough to use the 3.2 rods with a 3.9/4L crank. If you could it would make for a much smoother, higher reving engine.
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Old 04-13-2004, 20:15   #7 (permalink)
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Re: Cheap high performance engine combo

I'm pretty sure joe what he's talking about!!

how much for such a setup joe??

Dave.
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Old 04-14-2004, 02:22   #8 (permalink)
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Re: Cheap high performance engine combo

Just wondering how easy is it to find a set of 3.2L rods 2nd hand?? I have never seen a 3.2L motor.
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Old 04-14-2004, 03:47   #9 (permalink)
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Re: Cheap high performance engine combo

ok... time to clear the air a bit. :s6:

1st...

you can find 3.2 lt rods at wreckers if your lucky, they came out of the ea series 1 falcons more then any other... but, some series 2's also came in 3.2 (very rare)

otherwise, ford sell them new for less then 70 bucks each, i think from memory.

i was to do this option, but decided on forged custom rods of 6.3 inches

the 3.2lt rods are 6.27 inch rods, compared to 5.88 for the 3.9/4.0lt, the au has 6.05 inch rods.

pistons...well this is upto you, but a coupla ideas... acl may make a short stack piston to suit the 3.2 rod conversion. if not....the acl pistons that are for the 200 rods in the 250 x flow, may be the go, just have to make sure the pistons will fit the bores and vice versa. also look at commodore ecotec pistons and wrx pistons, cos they both have a high piston height, gudgeon pins may not match up tho.

if these options come to a dead end.... custom pistons may be the go, although at 1500 bucks a set (i know i just bought some!!!!).

this set up could be all done using new parts and fully machined, approx 2500-3000, but depends how cheap you are

good luck people.

side note,,, if it helps my own bottom end is as follows...

custom 60 tho over forged pistons
custom 6.3 inch rods
arp bolts used thru out
crank is ef item nitraded, balanced and off set ground to reduce throw.
au block, sump
12mm thick bisalloy crank girdle
jp-hi-volume oil pump

$5500 all up :s5:

cheers.joe.
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Old 04-14-2004, 16:53   #10 (permalink)
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Re: Cheap high performance engine combo

oooh

how much power do you expect to make from that (n/a)?
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