Yeah had a chance to look at the difference between the EF and EL intake setups, handy to have an EF and EL living in one house hold

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The difference in the size of the tube just after the airbox, is 21.5cm diameter for the EL and 28cm for the EF. Quite a significant difference.
This would explain why the EL is perceptably quieter apart from the dizzy cap setup which eliminates the ever ever so slight of beat fire of the EF.
Well i guess from this trait this explains why the later models may feel abit doey when accelerating. Whith slight mods the AU is a much more powerful car than the EF.
A guy i meet at the dyno day had a moded induction system pace maker headers and exhaust thats it, he was getting 122kw at the wheels.
The engine it self i reckon the AU is better and more pwoerful but with these air restrictions there potential seems hidden.