[Fot] abradable coatings

[Joe]

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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