Just a few questions for all you technophiles out there.
I have an EL (I6)that was built March 98. I recently I found out that it has an AU motor in it, apparently the first of the AU motors were placed in the ELs or something like that.
Anyway, My son has an EF, and he has always maintained that my EL goes harder than his EF. What I would like to know is: what is/are the differences between the EF and AU (EL) motors?
When I bought a Crow cam for the car, Crow mentioned that it was an AU motor, and I had to use a different cam.
Also, the badge on the side of the car says "Computer Tourque Control" as it does on many, many other cars. But just what does that mean? I know that that is probably a really dumb question, but "curiosity... and all that.
A third question that i have is: a lot of the AUs were built to be LPG compatible, does this mean that they may have bronze valve guides?
I have noticed that the EL has gone back to a distributor. Can you tell me what the head differences are? "Six in a row" has said the rocker ratio is different. I can only assume that it is a larger ratio to gain improvements.
Again I have seen an AU engine, and have seen the different sump. I don't presume to say my engine is an AU, but it must be a hybrid as you said Walkinshaw. When you say there are different crank & rods in the AU,did they stroke the AU?
- no, you're describing the intake pipe (from airbox to Throttle Body). The Inlet Manifold - called a BroadBand Manifold on EF and onward I6's - is the scroll shaped setup on the side of the head. Inside that manifold there are 6 butterfly plates on a common shaft actuated by the cylindrical gizmo at the front. The idea of this design is to make the runners long for low rpm torque and then switch to shorter path for higher rpm (ie. greater than 3800rpm). The "shortening" is achieved simply by opening the butterflies and allowing the air to pass straight down to near the head ports rather than having to travel around the full length of the runners (the scroll shaped part you can see).
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