[Fot] abradable coatings

[Bob Kramer]

Joe,

Can't say I'm lucky when I scuffed pistons but mine are okay.  I had a
radiator bottom hose pop off and saw the steam, but by the time I realized
I should shut it down I had the damage to just the skirts. Three were
scuffed a very minor amount so I saved the set . They've been sitting in a
box for years and only now, with this product would I consider using them.

Bob Kramer


On Wed, Oct 6, 2021 at 11:50 AM Joe <jaboruch at yahoo.com> wrote:

> Bob, I don’t know anything about the coating, but if the pistons were used
> enough to scuff, how are the ring grooves?  I have good looking used
> pistons,  but the ring groove are worn and out of spec.  Joe B
>
> Sent from my iPhone
>
> On Oct 6, 2021, at 12:20 PM, Bob Kramer via Fot <fot at autox.team.net>
> wrote:
>
> 
> I left out an important question.  We typically add extra clearance on
> #4.  With a proper coating the need may go away, but if the coating wears
> to fit.
>
> I also wonder how it works with liners.  Even with using boring plates, I
> suspect that the custom machined liners clamp down just a little bit
> differently when we bolt on a head and the perfect bore we were after may
> change. Nothing will change for the rings but the piston to bore clearance
> may be perfect.
>
> Bob Kramer
>
>
> On Wed, Oct 6, 2021 at 10:26 AM Bob Kramer <rkramer56 at gmail.com> wrote:
>
>> Has anyone used this company on a wet liner engine like a TR4? I have a
>> set of scuffed Wieseco pistons that could be rescued with a skirt coating
>> and the company says it will work.
>>
>> The coatings can be applied very thick and sometimes provide an
>> interference fit when a device is assembled. During initial operation, the
>> coating breaks in to form a perfect fit between mating parts. Controlled
>> abrasion even accounts for thermal and torque related distortions in
>> components as the coating wears in. Once the optimum fit is achieved,
>> stresses on the coating are reduced and the break-in process stops.
>> Durable, low friction, anti-scuff properties of the coating maintain
>> tighter operating clearances and higher efficiency for the life of the
>> device.
>>
>>
>> https://www.line2linecoatings.com/
>>
>> Armor Clearance Control™ (Armor CC™)
>> For building diametric thickness 0.002" to 0.020" - our hardest skirt
>> coating.
>>
>>
>>
>>
>>
>> Extreme wear resistance provides lasting enlargement of piston skirt
>> dimensions. Recommended for restoring clearances where they have opened up
>> from skirt collapse, wear, clean-up honing or other.
>>
>> Race proven durability in NHRA PRO-MOD. Coating can be topped with Slick
>> CC™ for the ultimate fit and lubricity.
>>
>> *Recommended for 2 strokes and 4 strokes.*
>> ADVANTAGES:
>>
>>    - *Restores and Holds Clearances*
>>
>>
>> Bob Kramer
>>
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