Jordan,BaronVonChickenPants wrote:Sorry to be the bringer of bad vibes, but I have explored this possibility myself and found the following flaws in the theory:
In short, to do this properly will require a lot of time, a lot of expense, a lot of trail and error and result in an overly complex and potentially unpredictable beast for minimal gains.
- The standard EA81 does not take kindly to forced induction due to it's long intake passages, the dual inlet twin carb EA81 or EA81T heads would be required to overcome this. Unfortunately these are rare and big $$$.
- Most carbs do not handle being pressurised as their basic principles rely on suction and gravity to get fuel into the engine. Positive pressure will usually just force air backwards through the fuel jets emptying the fuel bowl. There are carbs that are designed for positive pressure, unfortunately these are rare and big $$$.
- One alternative is to run the super charger in a suck through arrangement, but unless the charger is designed for it, this will drastically shorten it's life expectancy.
- Another is to adapt an EFI system in place of the carby, the SPFI systems from Camira's or EA Falcons are common choices.
For a reliable increase in power an EJ really is the way to go, even just an EJ18 is a nice unit.
Jordan.
I'll agree with most you have said, all very good points.
Never heard of that one, forces the fuel back through the jets.
Nearly any carb can converted to blow through, you just need to know what to modify.
The first is it MUST have a Nitrophyl float, a hollow float of any description will collapse under boost pressure.
The modification list is extensive, hence why suck through is easier.
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