improving aerodynamics with OEM parts

[Snoopy]

fitted all my parts today will see if it makes a difference

Have i listed all the parts i need? Or have i missed any?

[Aaron_RJ]

fitted all my parts today will see if it makes a difference

Have i listed all the parts i need? Or have i missed any?

spot on mate 

[Neimad]

Very true but I drive the same road at the same time with no traffic everyday will let you know tommorow

Any news on the repercussions of fitting these parts?

[Richn83]

Thank you.  

Engine undertray
1K0 825 237 P     Noise Insulation £28.84
1K0 825 951        Hex headed bolt (Combi) 89p (need 3 according to above list)

Rear axle cover as fitted to bluemotion
1K0 501 713 D    Trim for Rear Axle £26.73
1K0 501 682        Retaining bracket £1.89
N 905 483 05      Not on Stamm
N 901 838 02      Not on Stamm

Rear covers from A3 or TT
1K0 511 539 E   Stone chip Guard £5.37
1K0 511 540 C   Stone Chip Guard £6.75
8E0 825 267      a spreader rivet £0.12 (need 4 so x4)

What does the rivet go into, that would worry me a bit! (just dont trust myself) and how easy would these parts be to fit on axle stands on a drive as I dont have the luxury of a ramp 

Also any feedback Aaron?

[Snoopy]

Had mine on axle stands today for something else and to me it looks like the rivet fits in a hole on the arm thats easy accessable with the wheel off.

[Aaron_RJ]

Thank you.  

Engine undertray
1K0 825 237 P     Noise Insulation £28.84
1K0 825 951        Hex headed bolt (Combi) 89p (need 3 according to above list)

Rear axle cover as fitted to bluemotion
1K0 501 713 D    Trim for Rear Axle £26.73
1K0 501 682        Retaining bracket £1.89
N 905 483 05      Not on Stamm
N 901 838 02      Not on Stamm

Rear covers from A3 or TT
1K0 511 539 E   Stone chip Guard £5.37
1K0 511 540 C   Stone Chip Guard £6.75
8E0 825 267      a spreader rivet £0.12 (need 4 so x4)

What does the rivet go into, that would worry me a bit! (just dont trust myself) and how easy would these parts be to fit on axle stands on a drive as I dont have the luxury of a ramp 

Also any feedback Aaron?

hi sorry for no reply oops

not noticed any difference in consupmtion easy enough to fit on axle stands , the rivets are plastic nd when rear stone guards are fitted the go through the guard and suspension arm and splay out

[Snoopy]

Anyone know what the two parts for the axle cover are that i could not find?

[Aaron_RJ]

Is a fixing kit you dot need to use It though just use some self tapping bolts m8 thread

[the bruce]

I had the bolts from VW, but don't hesitate and use some standard ones.
Just take care it's zink plated or similar.

[RedRobin]

I had the bolts from VW, but don't hesitate and use some standard ones.
Just take care it's zink plated or similar.

....I think stainless steel bolts would probably be best of all.

[the bruce]

Of course, feel free to use stainless.
First I wrote ''stainless'', but I changed it for ''Zink plated or similar'' before clicking the button.
I try to avoid shiny bolts on, in and under the car (with the exception of exhaust).

[RedRobin]

I try to avoid shiny bolts on, in and under the car (with the exception of exhaust).

....Any particular reason?

My thinking would be to achieve the best durability. Titanium might be rather expensive!

[Richn83]

hi sorry for no reply oops

not noticed any difference in consupmtion easy enough to fit on axle stands , the rivets are plastic nd when rear stone guards are fitted the go through the guard and suspension arm and splay out

Not even at mototrway speeds?  hmm maybe there is somethign else about the GTI that affects the airflow like the front splitter making the air turbulent at the front removing the effectiveness of the smoother under-body.... 

[the bruce]

I try to avoid shiny bolts on, in and under the car (with the exception of exhaust).

....Any particular reason?

My thinking would be to achieve the best durability. Titanium might be rather expensive!

The only reason is that I like to have it looking OEM where possible. 

Titanium bolts would be nice, not too expensive when standard M8 and no too hard
to get, but are there any benefits at this place?
We should save weight where it counts: at the front, so a carbon bonnet and placing
the battery in the rear will make a remarkable difference for example.

[RedRobin]

The only reason is that I like to have it looking OEM where possible. 

Titanium bolts would be nice, not too expensive when standard M8 and no too hard
to get, but are there any benefits at this place?

We should save weight where it counts: at the front, so a carbon bonnet and placing
the battery in the rear will make a remarkable difference for example.

....Well, I've got the carbon bonnet and might consider carbon wings but too much hassle to move the battery to the boot. Also, too much hassle to keep having to recharge a compact lightweight battery alternative.

You can see that my car is well beyond looking OEM although I do like to kid myself that it's kind of OEM Plus.

To be honest, so far I'm not convinced that the underside aerodynamic parts being discussed are of any real benefit at all apart from perhaps protection.