Miata Mailing List: April 1994, Message #92
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   From: Jonathan Webb 
Subject: Sebring SC.
   Date: Wed, 6 Apr 1994 06:00:25 -0400

Bill , 

I tried to mail you direct but your mail address 
Bill.Allen@metrokc.gov seems to get bounced  - any good ideas ?

Is the article on superchargers too large to put out to the 
miata group ?

- Jonathan

    Eric Jacobs asks if anyone has installed the Sebring supercharger on their
    Miata yet and requests comments about extra load on engine components.  My
    Eaton/GP Products/Downing Atlanta/Sebring Supercharger was installed before
    Norman Garrett decided to coin the Sebring Supercharger name. The Miata now has
    about 1500 miles with the unit.  I interviewed Norman and wrote a lengthy
    article for our Chapter's newsletter, Miata Sounder (December issue.)  I'd be
    glad to send you a copy, if you send your mailing address. Norman intends to
    market an Eaton supercharger for BMW's and Honda's, too.  So he chose the
    Sebring name to market under.  As to extra load on the engine, Norman has been
    pretty conservative.  Boost is only six psi and the existing fuel pump and
    computer in the Miata is used.  The 160 hp, 155 lb ft ratings are comparable to
    the BBR turbocharger ratings that British Mazda were honoring their three-year
    warranty for.  I hear from Al Staats that they may have discontinued that
    practice.  The only stories I know of where the Miata engine/drive-train was
    stressed have been associated with 200 hp+ units.  I know of two supercharged
    units in Seattle that seem to be holding up to the loads fairly well.  One of
    those cars is autocrossed regularly and has had some clutch and transmission or
    driveshaft wear.
    I could go on at length about the good driveability of my supercharged Miata
    and the design features which seem to be the reason for it.  If you have
    specific questions that my limited experience could answer, I'd be glad to
    respond.  I did get my Miata to 118 mph this weekend, before I ran out of road
    and nerve, and I still had throttle left!
    Bill Allen



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