Another Technique for Piston Notching. - Page 3

**L n L** · 11-05-2009, 09:43 AM

Quote:

Originally Posted by Is1BadFord

Exactly...it's an anti-detonation/preignition tactic! It's the same reason that, before you assemble a motor you put a light bevel on the edges of all the reliefs to round them off a bit. Just one more step towards the safe running of these motors when they're going to be abused with either compression, rpm, load...or any combination of the above.

Cris

Here are my Probes, that I smoothed and TBC'ed.

**rocherman** · 11-05-2009, 11:28 AM

Quote:

Originally Posted by L n L

Here are my Probes, that I smoothed and TBC'ed.

...uhh...TBC'ed???...

**rocherman** · 11-05-2009, 11:42 AM

Quote:

Originally Posted by Is1BadFord

Exactly...it's an anti-detonation/preignition tactic! It's the same reason that, before you assemble a motor you put a light bevel on the edges of all the reliefs to round them off a bit. Just one more step towards the safe running of these motors when they're going to be abused with either compression, rpm, load...or any combination of the above.

Cris

AGREED...works everywhere...on edges of everything...does not matter if it is
fuel, air, or liquid...least resistance wins...

Sharp edges are NO good...especially where heat is a factor...

Oh wait...it's a motor...that would be everywhere...

Man...I forgot all about the shaving cream trick for filings...

Execellent writeup!

-

**L n L** · 11-05-2009, 03:35 PM

"...uhh...TBC'ed???..."

Thermal Barrier Coating

You prep the pistons, apply the coating with an airbrush, then heat cure it. You can pay PolyDyne or similar companies to do it for you, or buy the chemicals (like $20 for enough to do a few motors) and do it yourself. It rejects heat, makes it harder for carbon to stick, and gives a bit of "armor" to the piston top.

Lee

**EUGENE477** · 11-05-2009, 06:23 PM

Quote:

Originally Posted by L n L

"...uhh...TBC'ed???..."

Thermal Barrier Coating

You prep the pistons, apply the coating with an airbrush, then heat cure it. You can pay PolyDyne or similar companies to do it for you, or buy the chemicals (like $20 for enough to do a few motors) and do it yourself. It rejects heat, makes it harder for carbon to stick, and gives a bit of "armor" to the piston top.

Lee

Can we get more info on the coating? Where to buy, name, etc.

**L n L** · 11-05-2009, 07:06 PM

Not trying to hijack a great thread, but here ya go...

Internal Engine Coatings : Tech Line Coatings

I've bought from either Jegs or Summit in the past, can't remember which. I've used their products a few times now, going back into the 90's.

Lee

**EUGENE477** · 11-10-2009, 04:12 AM

Thanks Lee.