regulator-based MBC for 5kcstq, 15psi [long]

[JShadzi at aol.com]

>I was originally collecting parts to convert a WG cap over to adjustable style, so I could get some of the boost I had when I blew the lower WG hose.  But then I read that it wouldn't increase max boost, just the WG cracking pressure.  That makes sense.  I may still do the mod, just to be >able to tweak things.

That is only true if you are using the stock WGFV, in manually controlled configuration, cranking down pressure on the spring will absolutely raise boost.  Using my wastegate I can increase boost pressure by about 4 psi from all the way up to all the way down.  Think about it, push down on a spring, it takes a lot less force to copress that first inch than the second inch.

>Btw, if you take out the WG allen bolt from the underside, you can just push out the plug, you don't need to drill a hole and pull on a screw or >anything.

I drilled it out and used a course gauge (12 I think) 9/16" bolt.  The stock bolt is very fine thread metric, it takes too many turns to acutally increase pressure (unreasonably high resoloution), by using a coarse thread bolt, a more practical adjustment resoloution can be acieved.

>Where can I get the valve spring shim washers that are recommended as WG spring seats, so that the spring doesn't bind when adjusting the preload?
>

I've just used plain old washer's for that.

Javad