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Engine Cover

davidcross

davidcross

New member
I just had Chris Franklin from centre gravity replace and geometry set up my car and deliver it to my house (more on that later) who told me that whilst doing all the work he spotted that the engine cover was missing.
He explained that people do it for noise reason (enhancement) but suggested i question the merrits of this on the forum to see what members thoughts on this are??? tks
 
The main reason why people remove the engine tray is because it results in a lower oil temperature on hot summer days or when caught in traffic.
 
Its an essential part of the aerodynamics of the car, so if you are only keeping to the speed limits it wont matter. Otherwise protects the engine and tin ware to some degree from our salty roads, again if you are only a dry weather man then again it wont matter.

Oh and we are in Blighty its very unlikely to overheat!!!!!!!!!!!!
 
Not that I'm particularily aware of, best to compare to someone with one on. If you are looking for improved noise then the exhaust is the area to upgrade.
 
ORIGINAL: davidcross

I may get one stuck back on then...Does it make a big difference to the sound?
Click to expand...

Not at all.
If you look at the shape of this tray, you'll see that it was designed to protect the engine.
I highly doubt that one would feel the difference at speed with or w/o engine tray.
 

ORIGINAL: dommorton

Porsche's Engineers deemed it necessary so I do too.
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I must agree Dom. It's there to protect the engine from anything that might get thrown up but more importantly to provide a better airflow under the car. Yes, you may not notice any difference with or without it in normal driving conditions but Porsche aren't going to put something on if they didn't consider it necessary. The car's aerodynamics are designed with it in place and engine cooling is deemed satisfactory with it in place, why would any sane person take it off?

 
I don't think it's wise from a cooling perspective either as the tin ware and fan are designed to evenly distribute air with this cover in place. For all you know the cooling could be completely uneven with the cover removed?
 
Just out of interest has anyone had there undertrays go missing? On my last service I was notified that one was missing, and im sure ive had to replace it before.[:mad:][:mad:][:mad:]
 
Neil,

I once had an under tray go missing from a previous car that had been in for some major work. Interestingly, when they first got the car the garage told me the tray was 'full of oil and junk' and they would jetwash it clean. When I got the car back it was missing and they told me it hadn't had a tray on it when they received it...

Cheers/John
 
This comes up on Rennlist every few weeks. One problem people have found with removing the tray is the heater flap intakes under the car are prone to damage.

In 12 years of 993/964 ownership I have never had a problem with overheating. Overheating may be an issue in places with 40 degree heat like Texas and Arizona but for the UK ? Leave the tray in place.
 

ORIGINAL: M030

ORIGINAL: davidcross

I may get one stuck back on then...Does it make a big difference to the sound?
Click to expand...

Not at all.
you look at the shape of this tray, you'll see that it was designed to protect the engine.
I highly doubt that one would feel the difference at speed with or w/o engine tray.
Click to expand...

in the factory repair manuals it states that if the undertray is removed speed of the vehicle must not exceed 100 kmh
 
Cars never felt unstable at 130 mph when I've gotten up
there but nonetheless i'll have one stuck
on when it's serviced again next year
 
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