Difference between AU1, AU2, and AU3 I6 engines.

[hppsc]

Hi guys

The base model AU engine, does anyone know what differences they had between the series?

I can pick up an AU1 engine to go into my ED, but i'm not sure whether there was anything better on an AU2 engine, etc.

Thanks

[Fairlane]

No difference at all, AFAIK.

[JC]

As Fairlane said, no differences at all. They are all rated at 157fwkw and 357Nm torque.

[onfire]

With the said.. what are the differences in terms of weight? Between a standard au1, au2 & au3 Forte.

[Casper]

Originally Posted by onfire

With the said.. what are the differences in terms of weight? Between a standard au1, au2 & au3 Forte.

I would assume AU2/3 is fractionally heavier due to better equipement, bigger brakes, laminated firewall etc. Effectively the difference is SFA though.

[onfire]

With all that said in terms of weight.. AUI i6 vs AUII i6 vs AUIII i6 - Im guessing the AUI is slightly quicker.

[Casper]

Originally Posted by onfire

With all that said in terms of weight.. AUI i6 vs AUII i6 vs AUIII i6 - Im guessing the AUI is slightly quicker.

I think the day the engine was made is probably going to be more of a factor than the series the AU is for ET's

[JC]

Originally Posted by onfire

With all that said in terms of weight.. AUI i6 vs AUII i6 vs AUIII i6 - Im guessing the AUI is slightly quicker.

If it is, it also takes longer to stop thanks to the toothpick brakes. So maybe down the 1/4, a stock AU1 would just pip an AU2 of similar spec (eg auto forte vs auto forte). But in a go to whoa, the series 2/3 will win every time.

[xr6 ausome]

Just upgrade the brakes and the s1 will win each time even go to whoa :hihi:

[EFFalcon]

or we could talk about the engines like first mentioned :P

the exhaust manifold head sheild on the AU2/3 is better then the AU1 :P

[JC]

Originally Posted by xr6 ausome

Just upgrade the brakes and the s1 will win each time even go to whoa :hihi:

Well, then the AU1 will be a little bit heavier with the larger brakes off the series 2, so maybe not. We are talking less than 0.1 second for 400m dash, between AU1 and AU2/3. So the weight of the driver will actually determine take-off and acceleration more than whether it's series 1 or 3.

[JC]

Originally Posted by EFFalcon

or we could talk about the engines like first mentioned :P

the exhaust manifold heat shield on the AU2/3 is better then the AU1 :P

But if you fit extractors, who needs heat shield! :hihi:

[EFFalcon]

Originally Posted by JC

But if you fit extractors, who needs heat shield! :hihi:

i'd still want a heat sheild :P

[JC]

For the LPG converter - yes, you would. I forgot about that. i before e, except after c.

[EFFalcon]

Originally Posted by JC

For the LPG converter - yes, you would. I forgot about that. i before e, except after c.

my bad, even if i didnt have LPG, running a heatshield to keep engine bay temps down a tad can only be positive.

[LOWAU]

Don't the series 2/3 have 0.5L more oil capacity? so it brings it to 5.5L total.

[Perana]

My Dad's S2 only takes 5L of oil..

The coil packs are different aswell... no idea on anything internal though.

[Casper]

Originally Posted by EFFalcon

my bad, even if i didnt have LPG, running a heatshield to keep engine bay temps down a tad can only be positive.

I agree, even with extractors the heat shield is very useful to keep under bonnet temps down (or HPC coating).


As for the engines etc. Effectively there is no differrence in performance at all. As JC said, the driver would make far more difference then the engine/weight. Hell, the one with the bodgy rear shock would probably be more of a difference then the model themselves.

[TURBOTAXI]

I put a series three engine into my series one car.

I needed to take the coil pack off the old engine, the throttle body off the old engine (plugs were different) There was also something about the engine mounts IIRC.

[AUIIIXR8]

AU3 XLS ended up getting the XR6 non VCT motors. I've got one

Sadly the added weight of the ute take away any advantage there would have been however small the advantage was.

[cArSiK]

IIRC the VCT motor had some updates in the S2 release with the compression being raised a tad. Nothing official was released to say this. Casper is the man to confirm / deny this..

[ned]

Can you identify what series motor you have from the writing that's cast on the front? Can anyone confirm the different number for AUI, AUII and AUIII ?

[bodes-sh]

the writing on the head doesn't necessarily mean its from that engine, your best bet is probably the engine number...unless you know what car it actually came from

[Rfordsfun]

Hi all, my au2 fair/ghia has the heavy duty mounts, i think they are refered to as ef/au v8 mounts, but mines an i6 vct. Have to swap the passenger side out, it clunks with gear changes (auto) with no torque. are there any variations of this mount ? or are my current ones flogged as they sit very low compared to the new ( 2nd hand ef/auv8 according to wreckers ) ? cheers

[colinford]

Ford Forum Members please answer a ? I have PLEASE , Will a Tickford Head of a EF XR6 Series 2 fit a 2002 AU 6cyl , as I have Headers & exhaust to suit

[Rfordsfun]

Hi Colin, what exactly do you have ? And what are you trying to do?