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Thought ild share this with you guys.
I really wanted to see the design of the piston in the Caldina, Remember this is a turbo running 9:1 with the RODS the same as our Red Top Beams, so i bought one.
HP is up to 265 compared with the gen 3 sitting at 245 HP.
So Toyota quite obviously reckons the Rods are ok to this HP .
But the Pistons are a different story. I will post pictures but surfice to say they are different.
Heavier with more aluminium.
They are also coated on the skirts.
Wrist pins are longer, hence wider pin bore.
Caldina has no oil drains on the pin boss, but have MUCH more material , at least 3 cms
where as the Red Top is 2 cms and the Red Top has a drilled hole.
Ring positioning is also different and sizes.
Ring one the same
Ring 2 Caldina slightly thicker
Ring 3 Caldina Nearly half !
Domes are different with the Caldina having a dish.
Im getting to anal again, so im letting a real motosport engineer do the final design for me.
One thing for sure is that even though the RODS are the same the Caldina Pistons are definitely Beefier , something that i can see that would be needed for FI and forging.
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