15 replies to this topic

[siztenboots]

apart from Wossner is there anyone else supplying DLC coated piston assemblies = wrist pins/rings/skirts ?

[alanoo]

There is no one suppling DLC coated skirts and rings for our budgets yet DLC pins are easy on the other end... most brands would have them if you ask for. (JE and CP does on option)

[Exmantaa]

And while we are on pistons; any suppliers that deliver something suitable (~9,5CR) in a 4032 alloy for the Ecotec? Mahle does, but only in a low 8,5CR...

[alanoo]

Wiseco, Wossner and CP are used to work with 4032 forgings, but that would be a custom piston so a bit more expensive than shelf ones

[fezzasus]

I would really exercise caution when looking at DLC coatings, especially in applications that they're simply not designed for. As you may or may not know I work for an additive company that designs and formulates engine oil to sell to marketers such as Castrol, Mobil1 ect. - one in three cars on the road uses oil we made. DLC applications are very limited and simply put it means oils are not designed and likely will not protect DLC surfaces, which could lead to worse wear than keeping the existing non-DLC surface. Additionally there are 7 types of DLC with a range of application methods and many approaches to impregnate the surface; without careful selection and testing you could see de lamination (causing massive wear in the engine as large sheets of DLC are transported by oil) or actually increase the roughness of the surface, creating a very hard and abrasive material that could wear through the cylinder liner.

[alanoo]

or JE with their SRP brand but not sure they do custom ones for SRP

[FLD]

Ross racing pistons or get some coated by someone like cam-coat. Worrying oil post above though. Should be considered.

[FLD]

I would really exercise caution when looking at DLC coatings, especially in applications that they're simply not designed for. As you may or may not know I work for an additive company that designs and formulates engine oil to sell to marketers such as Castrol, Mobil1 ect. - one in three cars on the road uses oil we made.

DLC applications are very limited and simply put it means oils are not designed and likely will not protect DLC surfaces, which could lead to worse wear than keeping the existing non-DLC surface. Additionally there are 7 types of DLC with a range of application methods and many approaches to impregnate the surface; without careful selection and testing you could see de lamination (causing massive wear in the engine as large sheets of DLC are transported by oil) or actually increase the roughness of the surface, creating a very hard and abrasive material that could wear through the cylinder liner.

Infineum???

[siztenboots]

I would really exercise caution when looking at DLC coatings, especially in applications that they're simply not designed for. As you may or may not know I work for an additive company that designs and formulates engine oil to sell to marketers such as Castrol, Mobil1 ect. - one in three cars on the road uses oil we made.

DLC applications are very limited and simply put it means oils are not designed and likely will not protect DLC surfaces, which could lead to worse wear than keeping the existing non-DLC surface. Additionally there are 7 types of DLC with a range of application methods and many approaches to impregnate the surface; without careful selection and testing you could see de lamination (causing massive wear in the engine as large sheets of DLC are transported by oil) or actually increase the roughness of the surface, creating a very hard and abrasive material that could wear through the cylinder liner.

ah not so good, which leads me onto wondering about running a gearbox additive, and came across this ( http://www.interflon...ditive-fin-gear )

[fezzasus]

I would really exercise caution when looking at DLC coatings, especially in applications that they're simply not designed for. As you may or may not know I work for an additive company that designs and formulates engine oil to sell to marketers such as Castrol, Mobil1 ect. - one in three cars on the road uses oil we made.

DLC applications are very limited and simply put it means oils are not designed and likely will not protect DLC surfaces, which could lead to worse wear than keeping the existing non-DLC surface. Additionally there are 7 types of DLC with a range of application methods and many approaches to impregnate the surface; without careful selection and testing you could see de lamination (causing massive wear in the engine as large sheets of DLC are transported by oil) or actually increase the roughness of the surface, creating a very hard and abrasive material that could wear through the cylinder liner.

Infineum???

yes

[fezzasus]

I would really exercise caution when looking at DLC coatings, especially in applications that they're simply not designed for. As you may or may not know I work for an additive company that designs and formulates engine oil to sell to marketers such as Castrol, Mobil1 ect. - one in three cars on the road uses oil we made.

DLC applications are very limited and simply put it means oils are not designed and likely will not protect DLC surfaces, which could lead to worse wear than keeping the existing non-DLC surface. Additionally there are 7 types of DLC with a range of application methods and many approaches to impregnate the surface; without careful selection and testing you could see de lamination (causing massive wear in the engine as large sheets of DLC are transported by oil) or actually increase the roughness of the surface, creating a very hard and abrasive material that could wear through the cylinder liner.

ah not so good, which leads me onto wondering about running a gearbox additive, and came across this ( http://www.interflon...ditive-fin-gear )

wouldn't touch the stuff - teflon will act as a 3rd body abrasive if unattached to a surface and is essentially the same as pouring sand into the engine. DuPont (owner of the Teflon name) actually tried to stop it being marketed towards wet lubrication applications because there's no benefit.

[alanoo]

F1 uses DLC coating on piston skirts only since 2 to 4 years (depending the engine...). It was in fact, the last part coated in the engine, the most difficult and the most expensive to do. It needs special machinery for each piston, when coating some simpler parts like cams or pins or bearings is almost "easy". There's not much DLC stuff available for us, low budget aftermarket guys... apart from piston pins, ACL started some DLC rod bearings too. Totalseal have some other PVD coated rings which should be just as good. DLC coated cams would need a billet cam and there's not much to be gained with roller followers. Although a piston skirt coating is something I consider mandatory for our needs on a forged piston, there are other coatings available which are good enough for our requirements, and that most custom pistons guys already offer. There's more to be gained on the piston design itself than moving to DLC...

[FLD]

I would really exercise caution when looking at DLC coatings, especially in applications that they're simply not designed for. As you may or may not know I work for an additive company that designs and formulates engine oil to sell to marketers such as Castrol, Mobil1 ect. - one in three cars on the road uses oil we made.

DLC applications are very limited and simply put it means oils are not designed and likely will not protect DLC surfaces, which could lead to worse wear than keeping the existing non-DLC surface. Additionally there are 7 types of DLC with a range of application methods and many approaches to impregnate the surface; without careful selection and testing you could see de lamination (causing massive wear in the engine as large sheets of DLC are transported by oil) or actually increase the roughness of the surface, creating a very hard and abrasive material that could wear through the cylinder liner.

Infineum???

yes

I tried to get a job there. They ran a massive recruitment campaign at my uni then never replied to any email I sent to the recruitment email address.

[fezzasus]

I would really exercise caution when looking at DLC coatings, especially in applications that they're simply not designed for. As you may or may not know I work for an additive company that designs and formulates engine oil to sell to marketers such as Castrol, Mobil1 ect. - one in three cars on the road uses oil we made.

DLC applications are very limited and simply put it means oils are not designed and likely will not protect DLC surfaces, which could lead to worse wear than keeping the existing non-DLC surface. Additionally there are 7 types of DLC with a range of application methods and many approaches to impregnate the surface; without careful selection and testing you could see de lamination (causing massive wear in the engine as large sheets of DLC are transported by oil) or actually increase the roughness of the surface, creating a very hard and abrasive material that could wear through the cylinder liner.

Infineum???

yes

I tried to get a job there. They ran a massive recruitment campaign at my uni then never replied to any email I sent to the recruitment email address.

There are a few possible reasons for that, if you're interested then send me a PM and i'll go into it.

[Dashwood]

What about http://www.wpctreatment.com/ is this a load of tosh as well?

[fezzasus]

What about http://www.wpctreatment.com/ is this a load of tosh as well?

It's a version of this: http://en.wikipedia....ki/Shot_peening however they don't describe what media they use so i'd advise caution.