There is no hole to shoot oil into the piston anymore.
The Supra may shoot up towards the piston but does it coat a specific section of it?Whats the advantage of cooling the piston? Or the advantage of cooling the cylinder walls? What happens to metals when they get hot? They expand? How much do casted pistons vs low silicon pistons vs high silicon pistons expand and at what temp? Here is my thought of expansion A. Cast piston expands quickly and the most and dissapate heat the worst. (my thoughts on why the piston needs to be cooled)
B. high silicon expand less than casted and better dissapates heat. But provide less piston slap and come up to speed sooner but are not as strong as low silicon pistons.
C. low silicon pistons are the strongest of all three, dissapate heat the best, and hardly expand do to the heat. (add to the fact you can get them coated) they will deal with heat the best. So if we agree that low silicon pistons are the least likely to expand and deal with heat best especially if coated where are going to get a better results of oil cooling? The cylinder walls or the pistons? Lets talk about what will happen if you use the NA squirters? I feel you get these benefits 1. The rings are constantly cooled which means less wear and better compression.
2. The cylinder walls are cooled which means they will expand less and better kept shape.
3. A more cooled block will hold up better. Now these are just my thoughts whether I am on base or is really hard to say. I sent a few emails to couple different people who know better than myself and I will post my results. In your case are Jun pistons high silicon or low silicon?
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