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Premium Member
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22 Posts
Discussion Starter #1
I've just had my GT remapped by Celtic :)

2 weeks in and i'm very happy with everything.

I've since been reading about fitting a FMIC, as it takes the strain off the turbo - if i've read correctly.

At the moment the car is a 57 plate with 102K on the clock (mostly motorway miles, all fully Honda serviced etc) i bought it at 99K from the company i work for.

I find anywhere that recommends when the turbo should be re-conditioned or replaced??

whats the general adivce on this...?
 

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Registered
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74 Posts
The front mount intercooler cools the air flowing into the engine. This is especially important on turbo'd cars as the turbo tends to heat the air up. The colder the air, the denser the air therefore the more air you can get into the engine giving you a better bang and more power.

I spose as the air is cooler passing through the intake side of the turbo then yes it may help the turbo run slightly cooler and therefore last longer.

I would have thought the turbo should be reconditioned or replaced when there is an issue with it such as lack of boost, excessive smoke, warning lights etc. If your has done mainly motorway miles then the turbo should have been used and abused less so should be good for longer.
 

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Cockup Specialist
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12,885 Posts
Partly right :thumbsup:

The intercooler is positioned between the Turbo and engine.
It does not cool the air entering the turbo. :D

Pressurised air heats up.
The intercooler is there to make sure the air does not heat up to ridiculous levels.
It also enhances power.
Hot air occupies more space or if you prefer.. there will be less oxygen/air for the same pressure between turbo and engine
So basically you can flow the same volume of air but the mass of that air will be less.

Normally the ECU demands a specific manifold absolute pressure per rpm at the engine.. increasing the turbo speed (closing the VNT vanes) to get it.
Hot air will flow less mass at this pressure than cold air.

Here is an example using volumetric efficiency or Ve.
Ve is how much the engine cylinder can hold at any rpm vs how much it actually gets.
A perfect enigne will have 100% Ve.
Moste engines have 85% Ve.
Highly tuned engines achieve welll over 100% Ve.

BLUE = OEM intercooler / OEM CAI / OEM MAP
vs
RED = Custom intercoolar / OEM CAI and OEM map
vs
GREEN = Custom intercoolar / Ramair /and OEM map

Although the Ve for the FMIC appears the same the airflow is substantially colder and up
Remember Ve is volumetric efficiency and measure volume flow ....not air mass or mass flow ;)



 

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無限 Unlimited
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3,740 Posts
Super info Relic :)
 

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Cockup Specialist
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12,885 Posts
:lol: ....OCD sorry ;)

Anyway, if the seals go you'll start eating oil.
If the VNT clogs boost will go all over the place.
There is a couple of places that will clean VNT.
I haven't heard of the oil seals going on the gt1752s yet.
RTECH do the cleaning for one.

Oh... warning... seriously improving the airflow means there is less load on the turbo.
BUT... due to this the turbo overboosts... badly on a high boost remap.
You can get away with it on OEM map.
For anything serious you'll prob need a proper custom remap.
:(
 

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Premium Member
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645 Posts
And one important detail.. It looks very cool from the front of the car :)
 

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Cockup Specialist
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12,885 Posts
I sometimes think it looks a little puny :popcorn: ....
 

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Dr. Evil
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3,831 Posts
Yeah Relic, you need one this size:



Also, colour code that trim :p
 
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