BMFC, Tiiming, and Coatings

[Programmer]

I have no faith in some kind of coating--just like I have no faith in Teflon
additives...instead of coating the undersides of pistons, or coating the
interior of an engine--polishing the interiors smooth would have a greater
effect of oil return, and less oil "dwell".  As far as piston ring
manufacturers go--gapless piston rings and improper end gaps will always
yield differing results. You can make anything look good on a
dyno--depending on operator.

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 8:08 AM
Subject: Re: BMFC, Tiiming, and Coatings


>So you have no faith in piston ring manufacturer's dyno claims?
>Shannen
>
>Programmer wrote:
>>
>> Greg,
>>
>> The only problem with testing like that is the motor had to be torn down
to
>> perform the experiment. I'd put little faith in a 15 degree change when a
>> complete teardown would have had to be done to perform the work.
>>
>> Lyndon IP TECH
>> -----Original Message-----
>> From: Greg Hermann <bearbvd at sni.net>
>> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>> Date: Saturday, May 15, 1999 8:11 AM
>> Subject: Re: BMFC, Tiiming, and Coatings
>>
>> >>Has anyone run any "independent" testing on these barrier coatings for
>> what
>> >>they actually have seen as an improvement pre+post coating?.
>> >>  Has any one run any endurance tests?.
>> >>Do I need mention that this might need a complete recal to get right.
>> >>Bruce
>> >
>> >A fellow I spoke with at HPC told me that they ran a dyno test of a
fairly
>> >typical hipo 350 CID Chebby first with no coatings, then with coating
only
>> >on the piston crowns. Said that--with no other changes, the steady state
>> >oil temperature at sustained full load dropped 15 degrees F.
>> >
>> >Greg
>> >
>> >
>> >
>
>