Oil squirters for n/a build
06-08-2013, 07:34 PM
#8
I was under the impression that the oil ring grooves on a stock bp piston was specifically designed for squirters, and that a typical aftermarket piston's ring groove is designed in mind for motors without squirters.
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06-08-2013, 08:46 PM
#9
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Even in a naturally aspirated motor? There are a ton of high reving motors that do not have oil squirters out there. And I doubt that ceramic coatings are on a healthy percentage of them.
I was under the impression that the oil ring grooves on a stock bp piston was specifically designed for squirters, and that a typical aftermarket piston's ring groove is designed in mind for motors without squirters.
I was under the impression that the oil ring grooves on a stock bp piston was specifically designed for squirters, and that a typical aftermarket piston's ring groove is designed in mind for motors without squirters.
I also think the ceramic coating significantly changes how heat is transferred from the combustion chamber to the piston and the need for removing heat from the bottom of the piston.
I suspect the coating could be worth more power wise than just blocking off the squerters for several reasons.
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06-09-2013, 01:32 PM
#11
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My reasoning comes to these points.
1) Less combustion heat is transferred to the engine by way of the pistons.
2) The pistons don’t develop hot spots as easy thus you get better knock resistance.
3) Better knock resistance means you can run more timing which means lower waste heat is generated to begin with.
After spending years trying about every trick in the book to try to keep 200-250 hp 1.6l then 1.8l engines cool on the track currently My car will run pretty much continuously without going thermally unstable whale making ~350 hp. And it made a big difference with the 2.0l engine when I swapped to ceramic pistons and took the squirters out with basically no other changes in setup.
Another benefit in my book is the engine maintains higher oil pressure for added safety.
On an NA engine I still think you will gain some knock margin and be able to add some more timing, make more power. Might also be able to loose some cooling system weight. Possibly go to a little Honda Civic size radiator that would keep things stable.
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06-09-2013, 06:16 PM
#17
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I’m curious how well it works without the ceramic coated pistons.
Obviously the extra oil was meant to pull heat out of the pistons. But I might suspect the ceramic barrier coating on the top of the piston prevents more heat transfer than the extra oil ever was taking away. Some scientific studies suggest the ceramic might be reducing the amount of heat transfer through the piston by 15% or as much as 40%.
Obviously the extra oil was meant to pull heat out of the pistons. But I might suspect the ceramic barrier coating on the top of the piston prevents more heat transfer than the extra oil ever was taking away. Some scientific studies suggest the ceramic might be reducing the amount of heat transfer through the piston by 15% or as much as 40%.
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06-09-2013, 07:57 PM
#18
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I will not have the slugs coated. I was asking since apparently only the FM wisecos are clearanced for the squirters and off the shelf wisecos would hit them. Not sure if entirely true, but if removing them frees up some power I figured why not.
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