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Re: Extrude Hone on an Intake Manifold?

> While building a 3.4.liter Porsche Turbo engine we talked with many
> different professionals and concluded that in a turbo application it was not
> worth the money. Even someone at Extruded Hone said it would have limited
> performance increase on a turbo. I don't know how well designed/produced
> Audi's manifolds are to begin with,

I suspect they are quite good.  A quick check the other day of my old IM
versus it's old gasket showed them being exactly the same opening, ie no
material would have to be removed when porting etc.  Of course they may

Huw Powell


82 Audi Coupe; 84 4kq; 85 Coupe GT; 73 F250