coated pistons
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Scott Foxwell
rmcomprandy
foxbody
7 posters
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coated pistons
i have one of lems old motors from his boating days am wondering about coating the pistons i am going to change it up a little its a short stroke motor so i am planning a 9000 rpm and 1100 hp but i have no experiance on coated pistons so any advice will help in this decision thanks
foxbody- Posts : 30
Join date : 2016-04-20
Re: coated pistons
foxbody wrote:i have one of lems old motors from his boating days am wondering about coating the pistons i am going to change it up a little its a short stroke motor so i am planning a 9000 rpm and 1100 hp but i have no experiance on coated pistons so any advice will help in this decision thanks
There is some advantage to heat barrier coating the crowns however, anti-friction coating the skirts will be a preventive measure in the case of bad lubrication on the cylinder wall.
Re: coated pistons
I agree with Randy...the question is what do you want to accomplish with coatings?
Scott Foxwell- Posts : 419
Join date : 2011-06-23
Age : 65
Location : E Tennessee
Re: coated pistons
foxbody wrote:i have one of lems old motors from his boating days am wondering about coating the pistons i am going to change it up a little its a short stroke motor so i am planning a 9000 rpm and 1100 hp but i have no experiance on coated pistons so any advice will help in this decision thanks
Is this the 498 with the short decked AR aluminum block?
Re: coated pistons
yes it is lem any advise you have will be welcome its going in a 2800 lb fox body tube car 389 gear 0r 410 with a power glide no gas i want it all motor as i have a 605 ford on a bottle alllready dont need 2 bottle babys
foxbody- Posts : 30
Join date : 2016-04-20
Re: coated pistons
i was thinking that if the crowns were coated i might get a better burn rate as far as the skirts if i run a good oil and oiling system i thought that i would be ok if people that have used coating before havent seen a big improvement then i wil forgo the coating just wanted some feed back as it will be my choice in the end thanks for the feed back
foxbody- Posts : 30
Join date : 2016-04-20
Re: coated pistons
When you replace the existing pistons having the new ones hard-coat anodized would be an option.
Re: coated pistons
thanks lem i was going to use the existing pistons the pistons still look good and this would save a lot of fitting as these have a lot of work on them already but new rods are in the works along with danny b belt drive and a dry sump i will be calling you on these as it goes back together
foxbody- Posts : 30
Join date : 2016-04-20
Re: coated pistons
If you need some dimensional changes to the skirts I highly recommend Line2line coatings. I know guys who even use them on new builds. As for thermal coatings, that's always a good move especially on something with compression that's going to see some rpm and abuse. Coating skirts as a "friction modifier" has never shown a performance improvement. I would be careful hard anodizing new pistons if the ring grooves haven't been sized accordingly. Hard anno is great for alky but IMO not necessary for gasoline.
Scott Foxwell- Posts : 419
Join date : 2011-06-23
Age : 65
Location : E Tennessee
Re: coated pistons
Scott Foxwell wrote:If you need some dimensional changes to the skirts I highly recommend Line2line coatings. I know guys who even use them on new builds. As for thermal coatings, that's always a good move especially on something with compression that's going to see some rpm and abuse. Coating skirts as a "friction modifier" has never shown a performance improvement. I would be careful hard anodizing new pistons if the ring grooves haven't been sized accordingly. Hard anno is great for alky but IMO not necessary for gasoline.
There is nothing to be careful about anodizing, I just have Diamond do the "Double Diamond coating option" when I order the pistons.
The anodized stuff from Diamond can be ran with less piston to wall clearance = less piston rock and better ring seal = more power.
Re: coated pistons
I mis read what you said. I thought you recommended him having his existing pistons anno'd.Lem Evans wrote:Scott Foxwell wrote:If you need some dimensional changes to the skirts I highly recommend Line2line coatings. I know guys who even use them on new builds. As for thermal coatings, that's always a good move especially on something with compression that's going to see some rpm and abuse. Coating skirts as a "friction modifier" has never shown a performance improvement. I would be careful hard anodizing new pistons if the ring grooves haven't been sized accordingly. Hard anno is great for alky but IMO not necessary for gasoline.
There is nothing to be careful about anodizing, I just have Diamond do the "Double Diamond coating option" when I order the pistons.
The anodized stuff from Diamond can be ran with less piston to wall clearance = less piston rock and better ring seal = more power.
You can run less piston to wall clearance because the piston doesn't expand as much with the anno. Your running clearance will be about the same as a non anno'd piston. I really don't see the benefit for a NA deal on gasoline, but that's just me.
Scott Foxwell- Posts : 419
Join date : 2011-06-23
Age : 65
Location : E Tennessee
richter69- Posts : 13649
Join date : 2008-12-02
Age : 53
Location : In the winners circle
Re: coated pistons
Those must have come from Lem. "INJECTOR MASTER"
Curt- Posts : 2787
Join date : 2009-02-08
Age : 61
Location : Henrietta, Texas but mostly on the road
Re: coated pistons
I have Diamond anno'd pistons in two blown alky engines I'm building.Lem Evans wrote:^^^^^^
An example of the Diamond double coat.
Scott Foxwell- Posts : 419
Join date : 2011-06-23
Age : 65
Location : E Tennessee
Re: coated pistons
Scott Foxwell wrote:I have Diamond anno'd pistons in two blown alky engines I'm building.Lem Evans wrote:^^^^^^
An example of the Diamond double coat.
we put those in every blown combo we do here. they are darn good.
whatbumper- Posts : 3024
Join date : 2009-11-11
Age : 43
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