Steve,

I need to have another conversation with ric, but my understanding is that they will make power through out the rev range not just at the top end.

i am booked in on thursday 4th for the first dyno run, so we will see what the car is putting out in standard trim..

Cheers,

Rich.

Quick Update.

Zircotec will have completed ceramic coating my manifold tommorow. So hopefully will be deliverd back to me on monday.

Just been on the phone to graham goode racing regarding the CAI kit. They are going to do a couple of custom tweaks for me. The spun aluminium heat shield will be anodised black for me.

Now there is method in my madness.. everyone thinks that black is a rubbish colour for heat managment. This is not quite right. Black is the best colour for raidiating heat out from a material quickly.

Ali is a rubbish material becuase it retains heat really badly. hopefully the black anodising will reduce heat soak from the engine bay. It will also look nice and OEM when fitted with the black samco hose i have spec'd.. :-D

Exhaust has been spec'd and priced with tony from pumaspeed. Really nice chap and will be ordered on Monday from them.

Then we move onto the dyno once it is all fitted for a back to back comparison..

Then it will be a custom re-map with cam's to what additonal power this gives me. then the rickwood head goes on plus another re-map.. the idea being to see what each upgrade will give, what you gain and what you lose where..

A little knowledge is indeed a dangerous thing.

A black anodised heat shield will perform worse than a shinny aluminium one. Yes, black objects do radiate energy more, but unless you're heat sheild gets up to real temperatures (600°C +, by which point it will have melted), radiative loss is going to be negligable compared to your convective loss.

The same argument could be said for radiative gain - the engine bay isn't really that hot so heat transfer by radiation will be minimal.

More importantly it will look better anodised black ;o)

On balance, you can anodise it whatever colour you want and it will make chuff all difference, but if you're going to get picky, there will be more heat gained by making it black that heat lost as the engine is hotter.

gonna be interesting to hear the test results for each mod, good for anyone to see for future projects.

i didn't realise that ali melted at 600 deg c.. ;-)

As cold air is drawn through the the inlet heat shield to the filter then the temp drop should be quicker with black than with silver..

we will see.. ;-)

LOL - pure ally melts at 660°C but as soon as you atart to alloy it you'll see a reduction in melting point. Would need to know what alloy you've got to get the right phase diagram ;o)

Regarding the cold air moving inside the shield...... the whole point is you're trying to avoid that taking the heat back into the engine. You'd be better off with a polymer heat shield covered in tin foil; the foil would reflect and radiative heat and the polymer would slow conduction through to your "cool air chamber"

hmmm. i hear what you are saying regarding the reflective properties.

I am concerned with airflow to the heatshield in question to achive forced convection on the exterior. As the induction system will be situation where it will be in the flow of air. Then surely black will help..

As convectionis defined as:

Heat transfer in a gas or liquid by the circulation of currents from one region to another.

happy to discuss. :-)

He said conduction... as in heat transferred between to attached bodies...

A black object will loose heat by radiation quicker then a silver (reflective body) but it will also heat up faster as it will "soak" up the radiation. As it's not a perfect black body it will retain more heat then it looses through radiation so I'd go with silver if you want to reduce heat gain.
So tin foil and an insulator like a ceramic would be ideal (apart from the weight and possible fragility of the object)... other wise I'd say
black looks cool but steve1981 is right

so is my black mountune plastic one any good ?

Rich did you view the pics I posted on the other topic that you requested from me ?

good reading...

my head hurts...

Honestly the colour is not important as we're not talking serious radiative loss/gain here. The heat shield works as a thermal barrier for conductive transfer (heat moving through a material due to potential difference).

Convection can be ignored unless you force cool the outside of the heatshield which isn't a bad idea actually (run a flexi tube up from the lower front grill maybe)

The best material would be plastic and as said, covering the outside in tinfoil certainly wouldn't hurt, but I don't think you see any tangible gain.

If you wanted to go super OTT then I'd say make a sandwhich structure out of a porous honeycomb and force feed air through the sandwhich - this way you reduce your conductive transfer though use of polymer and paper materials and reduce the bulk of material to act as a thermal mass and you can actively cool the bulk using forced convective losses...... hurrah!

Oh - Peltiers might be an option as an electronic intercooler too?

If you

Steve,

Thanks for your input.. You have some good ideas.. I might look into some of them..

Update,,

Manifold is back. Pics attached..





tbh.. compared to the Jap stuff i am used to the welding quality is crap, but if it does the job then I will be happy. If not i will be off to primary designs for a proper custom built job, not a cosworth copy..

Enjoy.

Rich.

Just confirmed with jamsport that the car will be booked in 15th dec. they are gonna fit all my parts and do a custom dreamscience map.

Once this is done i will run it on the dyno dynamics rolling road again and get back to back results.

Then it is the ric wood head and cams. Again a back to back will be done to see what real gains are there to be made..

cheers,

rich.

Just be cautious with looking at "gains per mod" it goes without saying (but I'm saying it anyway) that certian mods only make a difference when other restrictions are also removed.

ie the exhaust works best in conjunction with free'd up flexi and induction kit.

Steve,

I understand exactly what you are saying.. that is why a gas flowed head and cams will be added after the exhaust/induction mods as these mods will support the additional 'flow' that the head will give.

The head and cams will then support throttle bodies should i use them..

but yeah i get the point..