Casidiam(DLC) is one of those coatings which makes power by allowing titanium pin use, less weigh on the rod small end....less mass.

 

I will guarantee ya one thing, Thermal barrier on the bottom and gasket face of an intake really keeps it cool by almost 75* between rounds.(on the top) The ice has more effect.

Bring your checkbook when ya get it done about 200 dollars. Had this Canton pan done on the outside but no test yet. Had the intake done too.

All that slick stuff isn't worth it at our level of racing. Pro Stock yea when ya are looking for the last ounce of HP.
The piston coatings are definitely out. I have seen more than one engine ruined because it popped off.Chambers and valves too. It's like throwing sand in the engine. The friction coating on the sides of the piston the same thing. That won't stay on a boosted 4.6 Ford making 1000FWHP@9000RPM's out of 281CID.

Let me throw in moly rings too,not the thing for me on a max effort. Have NEVER had them last any length of time. Maybe 2 weekends of racing then 12+% leak down and the bores ARE finished correct.An old set of ductile iron rings do me just fine especially if they are gapless top.

Just my thoughts on it.

 

Most times its not even Ti parts that they coat now... without the DLC Pro Stock would have had a really tough time doing what they do now with RPM.

 

As I said I ain't running Pro Stock and looking for the last ounce of HP or running them without OP for the last 320'. They also have sponsors to by their engines when the blow. They also have in house dyno's to do a bunch of hours of testing to see what works and get it right.
It's heartbreaking to see a guy put All that money in one and see it destroyed from substandard coatings that failed and that was not the cheap stuff.

I don't use them in my sprint car stuff either and they will last a season on dirt so I don't see a reason to change. They make more power than they can put to the ground,ya got to gear and tire them to get a hold of anything.

 

Larry, last time I checked even those guys can't afford to lose a motor, at $200,000 a motor I don't think anyone can afford to blow them other than Toyota F1. Any of this stuff can be good and usefull if it's done correctly. DLC can turn into a diamond file if you put it on something that is too rough, hell all it has to be is smoother than a Ra finish of .5! DLC is also something that cup guys can't live without. 9400+rpm is a scary area for wrist pins, .002"+ pin clearance and DLC coatings along with EDM drilled rods to oil them is about the only way they can do it.... hell now they are making oval holes in the pin bores of the pistons to make them live!

Bret

 

Bet they loose some on the dyno just like the cup boys do. That's the way ya learn 'bout stuff not at the track where everybody can see your *uck up.

The cup boys I thought were running TiT wrist pins with casadium coating to keep them from galling.
In any event the coatings are a high dollar luxury that is not totally necessary for the average racer and 99.65% of the people on this board.

Didn't say they were no good,just not necessary. Ya won't magically pick up .5 tenths by adding a couple of thousand+ dollars worth of coating and to me that isn't cost effective. 24hrs of LaMans ya do all ya can to keep um together but they won't accept my entry.

 

70-80g Cup pins don't NEED to be Ti, in fact the old IRL motors, Pro Stock and Cup all pretty much use DLC coated Tool Steel Pins. Pro Stock uses around a 2 5/8 long x 1.30+ diameter and it's about 130g per the rules. The DLC is there for when the oil is not, otherwise they would all break. They are using DLC on a lot of things now, that stuff doesn't flake off. If I was running something with a lot of case vacuum and some decent piston speed I'd have it on the pins as well. The coatings worth something IMHO are the ones that help the motors last, not make more power.

Bret

 

Larry, to me keeping the intake manifold 75* cooler is very good. Is the thermal barrier the same as used on the exhaust headers? You are saying the underside of the manifold and the gasket sides that matches to the heads. If so I'm going to get this done. Thanks.

 

No it isn't. Its a black coating that is called a heat dispersant.

 

Thanks Larry. I did a Google search and came up with "Thermal Dispersant Coating" and it is like you said. I will have to find someone here in Southern California that does it.

Hmmmm, wondering if that would work better on my aluminum cold air intake tubing to the throttle body? I have it ceramic coated now. I love these little nuggets of information. Now for the additional research.

 

How is this at all different then the second half of what I said?

How does the stuff popping off the chambers and valves ruin anything? It should be a few mils worth, and by the time it makes it to a hard part it will most likely be a fine powder. For a long time in the turbo world there was a “don’t coat the inside of turbo headers because it will pop off and ruin the turbo” till a few people tried it and actually had it pop off and found that there were no traces of it left anywhere, and no indication of any damage as it went through the turbine.

 

Reread my post ya quoted.
It's like throwing a hand full of sand in each cyl. Ya will rebore the block,new pistons,new rings,a valve job at a minimum.If ya don't believe it will Destroy your engine,get some and let it pop off and ya will see. It don't burn 'cause it's designed not to. It gets trapped in the rings and block metal. The finer the powder the more it can get trapped and do it's dirty deed.
The turbo thing it just blows through and don't get trapped like a cyl.

 

I bought Calico coated bearings for my 351W. The bearings were $88/set for the mains & rods...how they'll hold up, no clue...haven't put the engine togother yet. Seemed like a nice security blanket for a cheap price though.