[Land-speed] Gaskets...

[Benn]

How do you pressurize the intake when some valves are almost certainly
open (including some in overlap)?
Benn

> Mayf-
>
> Boost leaks, even small and undetected will play hell with your
> engine, especially if you're using a mass airflow metering system.
> Best thing to do is build a boost leak tester... essentially
> something you can hook to the input of your turbo and pressurize your
> system. I've seen many made of 3" pvc with a cap, a valve stem and a
> guage. once you've got your system under pressure, you do the soapy
> water in a spray bottle inspection, and see if you have leaks. It's
> the easiest way to make sure there's no leaks, and you can do it with
> a bicycle pump while waiting in line.
>
> For heads, if you're running 15-18 psi, the cometic are supposed to
> be able to handle that, but I've been told that to run high boost, I
> should get "O" rings installed in my head. What this essentially
> involves is a machine shop cuts a small groove around the cylinder of
> each head and puts a square ring of wire into the groove. When you
> torque down the heads you get a solid seal and it stands up to way
> more pressure than any head gasket could handle. I personally have
> not tried this, I'm still working on the body of my turbo eclipse,
> but I've looked into it, and it seems like a pretty solid solution to
> boost past 25 psi. Your results may vary.
> ~Jon