rear mudguards - will they help?

mbames · 06-02-2007, 19:11

Will fitting rear mudguards to my Octy estate help to reduce the amount of muck that ends up on the back window? The only car that I have driven which is worse for this trick was a Focus (which seemed to have a magnet for dirt and road spray).

Bloodnok · 07-02-2007, 01:18

i've got the standard little black flaps that are called mudgaurds on my estate, and the back window still gets filthy at anything over 15mph.
its just a trait of any flat back car i think.

it just means you have to use your rear washer more often, which means more of those annoying dribbles from the washer nozzle after you've finished with it.

KenONeill · 07-02-2007, 14:19

No!!

And that's from someone who's got rear mudflaps already!

cheezemonkhai · 07-02-2007, 15:22

Best thing I could advise is either a tiny spoiler at the bottom of the window (apparantly this changes airflow to reduce spray, but no idea if it works) or rain X etc on the rear window.

Nigel26 · 07-02-2007, 15:32

its all to do with aerodynamics ... not a lot you can do apart from the above post. i dont suppose there are any guarantees though.

KenONeill · 07-02-2007, 16:01

A spoiler (lower edge flap type thing, like NASCAR, not the vRS estate window-top style) might work, but I'd want to see wind-tunnel photos if my sole or main motivation was aerodynamics rather than styling.

cheezemonkhai · 07-02-2007, 16:10

Try it with some stiff plastic board and some tape, it it reduces tape up to a reasonable speed then give it a shot with a decent one.

Failing that wind tunnel time

mbames · 07-02-2007, 20:17

Quote:

Originally Posted by Bloodnok

i've got the standard little black flaps that are called mudgaurds on my estate, and the back window still gets filthy at anything over 15mph.
its just a trait of any flat back car i think.

it just means you have to use your rear washer more often, which means more of those annoying dribbles from the washer nozzle after you've finished with it.

I already have those useless little black things!

I end up doing a wipe 10 seconds later to remove the little dribbles. My 306 (granted it was a hatch) was much cleaner (apart from the black that came out of the exhaust pipe!)

Wayne Kerr · 07-02-2007, 20:40

Rear Mudguards ,,,,, no ,, no ,, no !!!

Rain X you have to purchase! Also a no ,, no.

Try (on a clean rear window) rubbing on neat Fairy Liquid. Let it dry for as long as possible (sun helps, some chance this time of year), polish off with a clean cloth.

Works for me, "suits you sir".

simonsheil · 07-02-2007, 22:25

Quote:

Originally Posted by Wayne Kerr

Rear Mudguards ,,,,, no ,, no ,, no !!!

Rain X you have to purchase! Also a no ,, no.

Well mudflaps are standard although don't seem to do much.

Cant really see Rain X helping. Mine is mostly covered in a thick layer of salt that would strip it in the first wipe.

I just live with it and clean the rear window when I can no longer see out of it. As for the rear numberplate at the moment, just about speed camera proof and it gets washed every 2 weeks.

Wayne Kerr · 08-02-2007, 19:56

[quote=simonsheil;830841]

Quote:

Originally Posted by Wayne Kerr

Rear Mudguards ,,,,, no ,, no ,, no !!!

Rain X you have to purchase! Also a no ,, no.QUOTE]

Well mudflaps are standard although don't seem to do much.

Cant really see Rain X helping. Mine is mostly covered in a thick layer of salt that would strip it in the first wipe.

I just live with it and clean the rear window when I can no longer see out of it. As for the rear numberplate at the moment, just about speed camera proof and it gets washed every 2 weeks.

I assumed mbames was talking WRC mudflaps!

KenONeill · 09-02-2007, 09:43

Just study a typical photo of a WRC half-way through the first damp gravel stage after service, to see how much use rally flaps are (mention of chocolate teapots springs to mind).

cheezemonkhai · 09-02-2007, 13:38

Still thinking a suitable lower edge spoiler, or an top edge spoiler that is correctly designed to force air down past the rear screen to reduce spray are the only ways.

At this point you are wanting to get real aerodynamics done before you try it, however if you did this for not too much you would probably sell a few of them, by the sounds of this thread

KenONeill · 09-02-2007, 13:45

I think something that forced an air curtain down over the window on an estate (which a vRS estate rear spoiler doesn't do according folks on here) might cause lift.
What's needed is a lower edge spoiler to lower the stagnation point to the base of the window, a similar (vertical height) point to where it is on the hatch.

cheezemonkhai · 09-02-2007, 14:44

Quote:

Originally Posted by KenONeill

I think something that forced an air curtain down over the window on an estate (which a vRS estate rear spoiler doesn't do according folks on here) might cause lift.
What's needed is a lower edge spoiler to lower the stagnation point to the base of the window, a similar (vertical height) point to where it is on the hatch.

Exactly my thoughts about the lift, hence the aero testing comment.

06-02-2007, 19:11	#1
mbames Briskodian Join Date: Apr 2005 Location: Weymouth, Dorset Posts: 1,620 Members Car: Octavia 2001, 110TDi Elegance estate Thanks: 0 Thanked 71 Times in 63 Posts	rear mudguards - will they help? Will fitting rear mudguards to my Octy estate help to reduce the amount of muck that ends up on the back window? The only car that I have driven which is worse for this trick was a Focus (which seemed to have a magnet for dirt and road spray).

07-02-2007, 01:18	#2
Bloodnok Briskodian Join Date: Aug 2005 Location: east anglia Posts: 43 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: rear mudguards - will they help? i've got the standard little black flaps that are called mudgaurds on my estate, and the back window still gets filthy at anything over 15mph. its just a trait of any flat back car i think. it just means you have to use your rear washer more often, which means more of those annoying dribbles from the washer nozzle after you've finished with it.

07-02-2007, 14:19	#3
KenONeill Briskodian Join Date: May 2006 Location: Normally in Scotland! Posts: 11,213 Members Car: Octavia TDi110 Thanks: 65 Thanked 561 Times in 549 Posts	Re: rear mudguards - will they help? No!! And that's from someone who's got rear mudflaps already!

07-02-2007, 15:22	#4
cheezemonkhai Briskodian Join Date: Jan 2006 Posts: 15,664 Members Car: Thanks: 116 Thanked 526 Times in 487 Posts	Re: rear mudguards - will they help? Best thing I could advise is either a tiny spoiler at the bottom of the window (apparantly this changes airflow to reduce spray, but no idea if it works) or rain X etc on the rear window. __________________ Cars make CO2 and trees absorb CO2. By driving your car you're feeding a tree and helping the environment.

07-02-2007, 15:32	#5
Nigel26 Briskodian Join Date: Nov 2003 Location: Walsall, West Midlands Posts: 2,298 Members Car: Sea Grey Mondeo Titanium X Thanks: 0 Thanked 0 Times in 0 Posts	Re: rear mudguards - will they help? its all to do with aerodynamics ... not a lot you can do apart from the above post. i dont suppose there are any guarantees though. __________________ Sea Grey Mondeo Titanium X

07-02-2007, 16:01	#6
KenONeill Briskodian Join Date: May 2006 Location: Normally in Scotland! Posts: 11,213 Members Car: Octavia TDi110 Thanks: 65 Thanked 561 Times in 549 Posts	Re: rear mudguards - will they help? A spoiler (lower edge flap type thing, like NASCAR, not the vRS estate window-top style) might work, but I'd want to see wind-tunnel photos if my sole or main motivation was aerodynamics rather than styling.

07-02-2007, 16:10	#7
cheezemonkhai Briskodian Join Date: Jan 2006 Posts: 15,664 Members Car: Thanks: 116 Thanked 526 Times in 487 Posts	Re: rear mudguards - will they help? Try it with some stiff plastic board and some tape, it it reduces tape up to a reasonable speed then give it a shot with a decent one. Failing that wind tunnel time __________________ Cars make CO2 and trees absorb CO2. By driving your car you're feeding a tree and helping the environment.

07-02-2007, 20:40	#9
Wayne Kerr Briskodian Join Date: Jun 2005 Location: NW Kent Posts: 936 Members Car: Metalic Black 1.8T 4x4 Estate Thanks: 9 Thanked 4 Times in 4 Posts	Re: rear mudguards - will they help? Rear Mudguards ,,,,, no ,, no ,, no !!! Rain X you have to purchase! Also a no ,, no. Try (on a clean rear window) rubbing on neat Fairy Liquid. Let it dry for as long as possible (sun helps, some chance this time of year), polish off with a clean cloth. Works for me, "suits you sir". __________________ Deli G ,,,, leader of the Peckham Massif! KW Coilovers fitted, Forge TIP fitted, KK fitted, Blueflame full system fitted, CAI fitted, Forge 007 D/V fitted, PBVH4 fitted, Forge adjustable rear tie bars fitted, FMIC fitted, 312's fitted, Tints fitted. Was that a 4x4 Skoda??? It's IMPOSSIBLE! 197.2 BHP & 263.1Nm

09-02-2007, 09:43	#12
KenONeill Briskodian Join Date: May 2006 Location: Normally in Scotland! Posts: 11,213 Members Car: Octavia TDi110 Thanks: 65 Thanked 561 Times in 549 Posts	Re: rear mudguards - will they help? Just study a typical photo of a WRC half-way through the first damp gravel stage after service, to see how much use rally flaps are (mention of chocolate teapots springs to mind).

09-02-2007, 13:38	#13
cheezemonkhai Briskodian Join Date: Jan 2006 Posts: 15,664 Members Car: Thanks: 116 Thanked 526 Times in 487 Posts	Re: rear mudguards - will they help? Still thinking a suitable lower edge spoiler, or an top edge spoiler that is correctly designed to force air down past the rear screen to reduce spray are the only ways. At this point you are wanting to get real aerodynamics done before you try it, however if you did this for not too much you would probably sell a few of them, by the sounds of this thread __________________ Cars make CO2 and trees absorb CO2. By driving your car you're feeding a tree and helping the environment.

09-02-2007, 13:45	#14
KenONeill Briskodian Join Date: May 2006 Location: Normally in Scotland! Posts: 11,213 Members Car: Octavia TDi110 Thanks: 65 Thanked 561 Times in 549 Posts	Re: rear mudguards - will they help? I think something that forced an air curtain down over the window on an estate (which a vRS estate rear spoiler doesn't do according folks on here) might cause lift. What's needed is a lower edge spoiler to lower the stagnation point to the base of the window, a similar (vertical height) point to where it is on the hatch.

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