AU3 Falcon XR8 Ute (auto)
Join Date: Nov 2002
Location: NT, Australia
Mitch_lx - I dunno about the Fiesta as I dunno what computer it uses, but with Falcons, if you go through the correct reset and re-learn procedure for the computer then you don't need to wait for a couple of weeks and it's a better way to do it anyway. The Turbonator looks alright but I'd be a little wary - the Hiclone is the only 'well proven' device of it's type that I know of. There are probably a lot of similar looking products around but just cause they look the same doesn't mean the performance will be anywhere near the same - from what I've heard there's a hell of a lot of engineering/airflow dynamics etc. involved in these and Hiclone were the first to perfect it. You never know - the Turbonator may even be better but I'd stick with what I 'know', at least as a reference and then try different ones later maybe.
EDXR8 - You have a valid point but I beg to differ. Nothing is more important to car manufacturers than saving every single cent that they can. They only meet emission requirements etc. because the law says they have to, and they will do it in the cheapest way possible, oftern at the expense of other things (performance for example). By saying that Hiclones would be installed by every manufacturer if they did anything is wrong I think. We all know they K&N air filters and Pacemaker headers (for example) do a great job of reducing emmisions and improving fuel economy as well as performance - everything a car manufacturer wants - why then doesn't every manufacturer fit them? Cause it would cost a little more (not to mention lost revenue in replacement paper air filters in the parts department in the case of the air filter). I could give many similar examples but you see what I mean? They can still meet the legal requirements allbeit with a little less performance/efficiency by other means with cheaper manufacturing costs.
The point you make about working on carbys but not EFI's with longer runners is very valid, but only if you believe that Hiclones work by creating the swirl effect into the combustion chamber. Most people think this is how they work and even Hiclone themselves advertise that this is what they do, so people may disagree with me here but I just don't buy it. I have another theory on how/why they work on EFI engines. To summerize it briefly, they simply are a device which accellerates/compresses the air passing through them. Fact is air is moving faster when it leaves the hiclone than when it enters which creates a low pressure side and high pressure side and effectively compresses the air like a passive supercharger effect kinda. So even though the swirl pattern is lost by the time the air reaches the cylinders, the point is the vortex has already done it's work in compressing the air so you simply get a greater volume/density of air into the cylinders. That's what I reckon anyway. Why do Hiclone advertise that the vortex goes into the combustion chamber and works that way? - I dunno, maybe it's just simpler from a marketing point of view than trying to explain airflow dynamics in a 30 sec. TV add etc.
Anyway, it's all theory until I can try some, but that's my thoughts anyway.