Now that i am building my new engine to go turbo i am planning to polish a lot of stuff. Firstly i am planning to do the timing chain cover, intake manifold and the valve cover. After i will do all the intercooler pipes of the turbo kit.

I have read somewhere that polishing does have effect on cooling temperatures. Is this true? And is it so much as to be significant?

I have a friend who has polish almost everything in his turbo S2000. His engine is so sweet, probably the best looking S2000 engine i have seen so far. Althought his car is close to 800whp it does not have at all high engine bay temperatures so he is trying to persuade me to do mine too

Chris

 

I must admit I do not know a lot about polishing aluminium on cars. My friend has a motorbike with a hand polished frame which is 'unsealed.' That does not see much rain and dulls every 6 months or so. That does not reallly answer your heat cycling question though sorry!

(thread drift - what turbo kit is your lucky engine receiving?)

 

Thank you for your reply

I will put the pfab-ELMT kit with GT35r turbine

 

Well, I suppose polishing will reflect certain amount of radiation.

However, unless you can shift the air, conduction will happen and you are back to square one.

My view is that it won't make any difference other than looking nice

 

I would imagine that polishing would have at least two effects on cooling (though i cant quantify the effect)

1- Polishing would reduce surface area for metal-air heat transfer. Easier to imagine on something like our inlet manifold -increasing heat retention.

2- Fluid dynamics suggest a smooth surface will effectively reduce the depth of any 'boundary layers' present. In the event of having an airflow over such a surface then there should be less retention of hot air as there would be a less turbulent (and hence thinner) boundary layer.

Though these both assume an airflow is present of the surface, which may not be significantly present. This is especially the case in point 2.

 

Would a rough surface not give more surface are for heat dispersal?
So the rough surface outide the pipe would drag more heat from the inside of the pipe?

 

The OEM airguide is designed to allow some airflow over the top of the engine bay[1]







[1] So long as you haven't covered it over with a 'cooling' [2] plate.

[2] No idea why it is given this name as it certainly doesn't help the cooling on the top of the engine bay.

 

it's a typo.
It should be a cooking plate.

Chuck some bacon on there at the start of the journey and it's cooked by the time you get where your going.

 

Thank you guys for your replies

Esem...i am sorry for my English but i did not quite get what you replied

 

Are u moving ur abs and brake master cyclinder for the pfab eltm kit??

When I looked into it all apparently polishing can cause heat issues and possible power loss... Who knows if this if fact

would love to see ur mates set up what is he using ??