BMFC, Tiiming, and Coatings

[Programmer]

Shannen,

Guess I'll have to look into this some more--I'm young and prejudiced to
gimmicks, so I'll have to do some research on this. Maybe I can find someone
that's working on this to throw on our dyno...be patient with me guys !!

Lyndon IPTECH
-----Original Message-----
From: Shannen Durphey <shannen at grolen.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Sunday, May 16, 1999 7:17 PM
Subject: Re: BMFC, Tiiming, and Coatings


>Well, in answer to the last question, ceramic thermal barrier coatings
>stick in the combustion chamber.  They've been around for years, and
>are starting to gain popularity.  Here's a company that makes DIY
>coatings, which some list members have used succesfully.
>http://www.deskmedia.com/~techline/Index.html
>
>I have thermal barrier coatings and dry film lubricant in an engine I
>run daily, and have had mixed results.  DFL is available on piston
>skirts through TRW, and GM is now applying it to pistons for the 3.1l
>engine.
>
>Shannen
>
>Programmer wrote:
>>
>> What about seat contact width ? Seat/valve contact location ? What kind
of
>> coating sticks to anything in the combustion area ?
>>
>> Lyndon IPTECH
>> -----Original Message-----
>> From: Robert Harris <bob at bobthecomputerguy.com>
>> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>> Date: Sunday, May 16, 1999 9:47 AM
>> Subject: BMFC, Tiiming, and Coatings
>>
>> >Dave Vizard reports that simply coating the combustion face of the
intake
>> >valve lowers the intake air charge temperature by 60 degree F or more
and
>> is
>> >worth typically two octane numbers increase in the effective octane of
the
>> >fuel.
>> >
>> >Remember that the intake valve face is exposed to combustion
temperatures
>> for
>> >at least 50% of the cycle and reaches the same temperatures as the
exhaust
>> >face.  Further the back side temperature reaches 600+F in a normal
engine.
>> >The majority of the intake valve cooling comes from HEATING the intake
air
>> >charge.
>> >
>> >Insulating the valve from most of the combustion temperature
significantly
>> >reduces the intake valve temperature and reduces the amount of heat the
>> valve
>> >can reject to the incoming charge.
>> >
>> >The intake valve coating is so important that Vizard recommends that if
you
>> >only coat one thing, it should be the intake valve.
>> >
>