Jump to content
SAU Community

Recommended Posts

  • 4 weeks later...
53 minutes ago, TXSquirrel said:

There should be data sheets if coming from an engineer.  Has the painted intercooler gone through team check?  :10_wink:

There are 2 sorts of engineers.  The document obsessed ones, who can't get anything right without a documented procedure and QA checklist, and the other sort, who just get shit done.

But the reality here is that big intercoolers are very seldom called upon to act as a steady state heat exchanger.  They heat up, then they cool down, and a lot of the "cool down" heat goes back into the air flowing through the inside after the boost event.  So, with respect to the usage model, any negative effect on external convective heat transfer from having a layer of paint is further reduced.  The other big thing is that you usually don't get a lot of pain onto the fins further into the core, so they are still mostly bare aluminium, and that's where the external heat exchange occurs anyway.  The tanks and the front of the tubes are not so important.  And lastly, the black is massively better for radiation heat transfer than clean ally, so even though the temperatures are nowhere near high enough for radiation to be a large proportion of the total heat transfer, the fact that radiation is improved probably goes at least part way to offsetting any reduction in convection, and for all I know might even be better.

  • Thanks 1

That sums it up pretty nicely.

Basically you need to remember that everything has a resistance to conduction, even aluminium, just happens that it's is pretty low. 
A very small (microns) thickness of something more resistive isn't going to be as much as a large thickness of something that is less resistive, they are all functions of thickness.

10 minutes ago, sneakey pete said:

That sums it up pretty nicely.

Basically you need to remember that everything has a resistance to conduction, even aluminium, just happens that it's is pretty low. 
A very small (microns) thickness of something more resistive isn't going to be as much as a large thickness of something that is less resistive, they are all functions of thickness.

Don't you dare tell that to the ceramic coating brigade.

6 hours ago, djr81 said:

Don't you dare tell that to the ceramic coating brigade.

That's why for them to honor the warranty car needs to go back for a "refresh" every 6 months, and that isn't free.

13 hours ago, GTSBoy said:

There are 2 sorts of engineers.  The document obsessed ones, who can't get anything right without a documented procedure and QA checklist, and the other sort, who just get shit done.

I know what you mean, but depending on the industry, and I'm sure you're fully aware of this, some procedures put in place were paid with lives lost.

On 2/23/2018 at 2:58 PM, mr_rbman said:

Mine just arrived, 3.5 weeks after ordering but worth the wait...

Looks even better in the flesh 

May I ask who you ordered it from?

I gave you a pretty good price and invoiced you up for it and you went silent :)

A message saying I will get it off someone else would have been nice.

On 20/03/2018 at 10:47 AM, GTSBoy said:

The document obsessed ones, who can't get anything right without a documented procedure and QA checklist, and the other sort, who just get shit done.

That sounds like off-shored IT helpdesk vs. people that know what they're dong.

On 3/21/2018 at 9:21 AM, Dose Pipe Sutututu said:

May I ask who you ordered it from?

I gave you a pretty good price and invoiced you up for it and you went silent

A message saying I will get it off someone else would have been nice.

Never got your invoice Johnny, i couldn't agree more with messaging someone after they've gone to the effort but i never got anything from you and i'm not one to bug someone for business...

I purchased from Quickbitz, was a few $$$ cheaper but if i'd received your invoice i would've gone with you....

56 minutes ago, niZmO_Man said:

Probably should become a trusted SAU trader :D

Wasn't intended to be a proper business. I just happen to have the right connections and out of my good will was helping out SAU members.

However in light of a few experiences I am no longer supplying parts to SAU members as per my signature.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Hi. Sry iam not a mechanic and iam not at the car atm so i dont know 100% but they told they measure those and even try to change those. AFM they have two. Coils are new a they have my old one too. Plugs too. ECU...we have 25 NEO stock and Nistune 25 NEO.   But i dont know if any one those could be the problem and why/if/what can cause this, Only thing they did not check is fuel...but that walbro 255 is new(like 1,5 years)... That fuel pressure gauge idk...but i let them know Any suggestions?   EDIT: how can they know if it is like you say he ECU pull power when it reaches a specific boost level that is too high? Tha car has boost controler
    • Can you clarify what you mean by boost cut, do you mean it misfires both when under load (driving) and when stationary and out of gear? Or does the ECU pull power when it reaches a specific boost level that is too high (boost control issue)? Does it occur at idle with no throttle? When you say "the ECU is OK", what ECU is it and why do you think it is OK? Have you used the NEO ECU, and if so do you have a MAP sensor attached? Same for the AFM, why do you think it is OK? Do you have any way to put a fuel pressure gauge on it (even just a mechanical one between the fuel filter and fuel rail)?
    • Hi.. Just another problem. So maybe you can help. I(my mechanic) done swap from my RB20DE NEO to RB25DET NEO. Everything is OK but we have a boost cut. Coils/Plugs are ok...AFM is ok. ECU is ok. I have Walbro 255 but it "changed" sound few months ago(you can hear it ouside) you did not hear that when it was new(maybe faulty?) Sooo...what now? What can cause this boost cut? It is even when you standing still...
×
×
  • Create New...