Smaller Radiator

[Steampunk]

Are you having overheating issues James?, or you want to do things a little different than everyone else?, or just pre-empting possible problems with more boost?

or all the above?

I'm guessing you are simply wanting to get the charged air as cold as possible.

We haven't kept in touch for ages so I forgot what other stuff is on your car (and I'm too lazy to flick through your garage thread), but did you have an oil cooler and/or coolant re-route?

[plohl]

FSAE Rule of thumb: Cooling system should be able remove 1/3 of max engine power as heat.

Civics with aftermarket smaller cross-section, thicker radiators generally run type r engines (from my observations)- stock these produce more power than most mod'd mx5s. Comparing a BP’s to any k series or b series honda type r engine is a joke. Not only are they making more power, but they are making more power at a higher RPM (if you can’t see why this is significant, stop reading now).

So what is to stop a radiator that is suitable for these high powered Honda engines? What are the other key components/ factors of a system?

Fluid flow rates play an important role in the efficiency of a cooling system = water pump and fan/air flow (car speed)/air temperature (can't control the air temp)

So, what is the flow rate of a standard 5 water pump at X RPM? How does this compare to that of k or b series type r engine at X RPM?

What is the pressure drop through each radiator?

What is the pressure drop across the face (front to rear) of the radiator? Thicker core will have a higher pressure drop due to skin friction between the fins and the air. On radiator core – there are stupid amounts of differences between the fins alone. Not all radiator cores are created equal!

What is the recommended operating temperature for each engine?

There are 2 main methods to calculate the efficiency of a heat exchanger – both require much more detail than what I have listed above (for those playing at home – LMTD and eNTU).

I suggest doing some research to find out how much power the Honda engines are running with similar sized radiators and how their water pump differs in performance to that of the 5. You might find that due to the higher rev’s the Honda water pumps have a greater flow rate.

[7Hazi]

Over 200kw... Nope. Doubt it.


Dann

Apparently it's bored/stroked to 2.1L (if I remember correctly). Video: http://www.youtube.com/watch?v=aGGmstUr ... r_embedded

[NitroDann]

The honda argument isnt fair, the cumbustion chamber in a B/K series is much more efficient, as for the rpm of the water pump, a new pulley would fix that EASY.

Dann

[plohl]

It is more efficient because if makes more power per cc? Is it more efficient because it uses less fuel to make that power?

Not disagreeing with you, the heat has to go somewhere though.

[NitroDann]

In every way.

They make more power per gram of fuel used, therefore more heat energy is used to make power, less goes into the water jackets.

Dann

[Aussie Stig]

In every way.

They make more power per gram of fuel used, therefore more heat energy is used to make power, less goes into the water jackets.

Dann

Dann it sounds like you made that one up on the spot.

[NitroDann]

Over 12:1 compression, improved swirl due to one intake valve opening before another, looks at the ports, and yet they make more torque through the midrange than a BP.

Research it yourself.

Dann

[16bit]

this is not thread about why a honda engine is more efficient than a mazda engine people.

I had an idea, I had concerns about it. I asked for opinions which every has so kindly offered various points of view and evidence, which i appreciated.

however please stay on topic or take it to the OT Lounge. it is a very interesting topic though...