psycho chicken

I did a search but got too many results to find anything.

What exactly is the go with the AU bottom end? Better balanced than E-Series, is that it? Would there be any advantage fully balancing an AU bottom end over an EL one?

svo347

According to the god book there is no difference.
Bottom end specs are the same.

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INJECTED250

THe au motor has more counter weights, better balanced.. Longer rods, lighter pistons, and bigger main bearings

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EB FALCON
98 T5 gear box (was auto)
Wade 977b cam
3.7 lsd
AU bottem end
ELXR6 ported Head
PH4480 Pacemakers

svo347

God damnit sorry was thinking of the V8 variety & didnt notice the inline 6 tech

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psycho chicken

Specs have to be different. Redline on dad's AU2 is 6500 or something. E-Series tachos don't even go that high do they?

So an AU crank wouldn't go into an E-Series block? Will an E-Series sump go onto an AU block?

INJECTED250

u thinking 6 or 8?

__________________
EB FALCON
98 T5 gear box (was auto)
Wade 977b cam
3.7 lsd
AU bottem end
ELXR6 ported Head
PH4480 Pacemakers

davway

looking at his Sig i would say its a 6.

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svo347

As i noticed its in the inline 6 area..

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psycho chicken

Yeah I mean 6, if I was touching an 8 bottom end I wouldn't be bothering with stocko 302 stuff!

madmelon

According to Jim Mock, the AU is the best bottom end to start with for performance mods (its on his site sumwhere)...the counterbalances mentioned above have something to do with it methinks. I'd imagine that each time the spec of the engine changed, the cranks changed slightly.
Very few cars come out of a factory with a "fully balanced/blueprinted" crank. The E series XR6's are an exception tho....so there is probably somethign to be gained by blueprinting/balancing the crank...but probably not as much as u'd get from spending the same amount of money elsewhere.

NOTE: Blueprinting is where they grind off all the casting bits (seams?) and make it all nice n smooth.

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