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Re: rocker set and turbo smoke

To: "Geoff Branch" <gjbranch@attbi.com>
Subject: Re: rocker set and turbo smoke
Date: Fri, 1 Mar 2002 12:07:36 -0800
Cc: <spridgets@autox.team.net>
References: <000701c1c141$98248610$7364640a@internal.vgl.ucdavis.edu> <001f01c1c163$b8121380$0200a8c0@mediaone.net>
Thanks Geoff,

I just spoke to a turbo shop in Sacramento.  He explained clearly why I
shouldn't try this myself.  The dynamic balancing of something that can spin
at 90K is CRITICAL.  It seems that the smoke is caused by the high vacuum at
idle when the turbo is producing almost no boost at all.  At that point oil
is sucked past a tired seal into the intake side producing the smoke.  Its
not the oil pressure that governs it, its the vacuum.   Since my just
completed rubuild, the idle vacuum is better than ever resulting in more
frequent idle-smoke episodes.

Unfortunately, rebuild/rebalance of the unit will be about $400-$500.  I'm
just going to jack my idle up to 1200 and try to get through the summer
while hoarding my pennies for the next rainy season.

Thanks for the suggestions folks, many good ideas from the group as always.

Regards,
Glen Byrns
'59 bugeye
'59 Morris Traveller (Winifred)

> I used to HAVE them re-bearinged.  Not for cars but for stationary
engines.
> They also inspected the shaft and housings, cleaned, reassembled and spun
up
> before signing off.  They are in Spoffard, NH and I could track down there
> number if you are interested.
>
> Geoff Branch
> '74 Meejit "Yellow Peril"
> '72 Innocenti 1300 Mini

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