[Audi20V_Kruemmer] Re: Crane HI6 install, and still some stumbling

[auditude at cox.net]

Hey Jim,

Not really to solve your problem, but I'm curious how your car would behave with a regular WG spring in there, and the pressure regulator making up the difference.

I still haven't tried it, but my theory is that there will be less lag since the WG won't see a pressure differential at all until the regulated pressure that the upper is set at, after which the spring would control/leak the boost.

Someday I'll try it myself.  I just picked the MC head with the fixed crooked stud hole from the second machine shop, so I'll be able to swap it onto my 5kcstq and dust it off again.

The first machine shop just bent the new stud so that it stuck out straight, suggested I just go with that, and didn't charge me.  The second shop put in a screw-in bushing and charged me $20, which I thought was not bad at all.

Ken

Jim Green <jeg1976 at yahoo.com> wrote:
>
> --- JShadzi at aol.com wrote:
> > Hmm, this is the same thing my car was doing when I
> > had the head gasket leak, for a while I tried to
> > trouble shoot my boost control, the boost was
> > fluctuating but not because of the control, due to
> > poor combustion from a miss or something.  I think
> > your hose is fine, 2' of 3/8id is nothing, does the
> > bucking go away when you turn boost down to, say,
> > 15psi?  How are you controlling boost anyway, with a
> > schrapnelknobben?
>
> Yep, 1.8 bar spring, and a pressure reg. on the top
> chamber.  I keep meaning to take off the pressure
> regulator, but I've ran into situations going up long
> hills where I try and hold the boost at 10-15 psi and
> it does it then as well.  It's strange, as the rpms
> build, the boost chatter smooths out and the car pulls
> fine.  I'm pretty sure I don't have a HG leak, the
> coolant hasn't moved since I put the header on.  I'm
> going to try removing the WI and pressure reg. at
> lunch just to be sure.
>
> Thanks,
>
> =====
> Jim Green
> '89 90tq 034EFI, Haltech IG5
> http://www.geocities.com/jeg1976/car_home.html