1.6 bar overboost on MC-2?

[james accordino]

Yeah, I should have/did know that.  Funny thing is I
did check the wastegate about 3 weeks ago when having
high speed/load driveability problems.  Replaced lower
hose as a precaution.  I was O.K., but not mint.  Top
chamber held 30 in. of vac. for half an hour.  It's
the original wastegate diaphragm and it's toast.  I am
surprised the lower hose looked as good as it did.

Thanks
Jim Accordino

--- Ben Swann <bswann at worldnet.att.net> wrote:
> Michelin Man hose will not cause overboost, but the
> opposite, low boost or
> no boost.
>
> Most common overboost cause I think is the lower
> wastegate hose.   Don't
> crack your wastegate open until you have verified.
> You can test the
> wastegate operation with a mityvac (or by mouth if
> you don't have one).
>  Apply suction on the upper hose, pressure on the
> lower.
>
> Ben
>
> [What was the common cause for 1.6 bar overboost
> spikes
> in an MC-2 engine?  Was it torn wastegate gasket or
> MM
> hose?
>
> Thanks
> Jim Accordino]
>


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