I have to say that generally Honda have on of the best cooling system designs.archyman wrote: Remember that the engines internals are calculated by an thermodynamics engineer and changing pistons with different shape may proove for the worse.
It is allways better to invest first in superb cooling system, perfect the a/f ratio, not touch the rev-limiter or compression and so on.. to get the max of the stock engine+turbo in a safe manner and sustained reliability.
Or if you want more than 7-9psi, go the hard way and straight to the aftermarket performance parts.
I have hardly ever heard overheating issues with Honda engines.
Overheat a Honda engine I can say that it must the owner fault. Old coolant, damaged thermostat, damaged sensor, blocked radiator or turbo engine with bad cooling design for specific power.
Honda have open deck design engines between piston sleeves and block that gives a lot of space for coolant.
This feature it is very important to prevent the engine from overheating. For this reason many car manufacturers have copied the open deck design, for example KIA-Hundai.
Now the question is: Can D14s cooling system accept an increase in the engine power without problems?
I can say yes with a up to a limit in the power increase such as 125-130 horsepower.
Have in mind that D16y7 have the same radiator with D14s, also some of D15s have the same radiators with our D14s.
But with changing the radiator from a narrow one that have D14s to the bigger one that have D16y8, D16z6 or the B-series radiator the capacity of the cooling system for our D14s will increase dramatically.
Even with a turbo set-up we can't overload the D14s cooling system with a just OEM radiator from D16y8, D16z6.
The B-series radiator will not fit because of bigger radiator hoses despite the same size with D16y8, D16z6 radiators.
