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General => Car audio => Topic started by: lordbigsack on 02 April 2008, 13:47

Title: Wheel Arch or spare wheel build?
Post by: lordbigsack on 02 April 2008, 13:47
I am looking to build a sub enclosure in the boot of my MkII but cant decide between the rear wheel arch or a spare wheel well build.  What are the thoughts on this.

Also, where is the best (for best, read cheapest) place to get the glass fibre matting and resins.

Cheers

Scott
Title: Re: Wheel Arch or spare wheel build?
Post by: Len on 02 April 2008, 15:02
Wheel well is easiest but loses you boot space and usability.

Wheel arch is harder to do but leaves boot clear.


Halfords large repair kit as you get gloves and pot/stirrer.
Title: Re: Wheel Arch or spare wheel build?
Post by: Hurdy on 02 April 2008, 23:58
I did an arch build in my MKV. The fibre-glass and resin packs were the biggest outlay as I just bought them from Halfords. All-in-all it cost around £100 for all the stuff.

I would have thought that the arch in the MKII is much smaller than the MKV and that the wheel well is for a full size tyre in the MKII, so I'd probably opt for the well rather than the arch. Same principle though.

http://www.golfgtiforum.co.uk/index.php?topic=81119.0
Title: Re: Wheel Arch or spare wheel build?
Post by: lordbigsack on 03 April 2008, 13:58
cheers for the info, the write up has helped no-end.  Think I am going to go for the Wheel arch, think it just looks more robust than having the sub in the spare wheel well.  How does the box perform?  do you get a good sound from it.

Just need to find a cheap fibre glass supplier near York!

Title: Re: Wheel Arch or spare wheel build?
Post by: Len on 03 April 2008, 14:06
Mine is great even form a 10" sub.
Title: Re: Wheel Arch or spare wheel build?
Post by: leeroy20vt on 03 April 2008, 18:52
thats very intresting that write just 1 question how do u do the maths to work out how much air is in there
Title: Re: Wheel Arch or spare wheel build?
Post by: lordbigsack on 03 April 2008, 20:35
thats very intresting that write just 1 question how do u do the maths to work out how much air is in there

I guess you could fill it with water once you have the basic tub, that should give you the volume and adjust it from there to get the exact amount.


are these good prices for matting and resin?  http://www.polyfibre.co.uk/ (http://www.polyfibre.co.uk/)
Title: Re: Wheel Arch or spare wheel build?
Post by: Len on 03 April 2008, 20:42
From my surfboard making days I'd say those prices are very good.

Good find mate!
Title: Re: Wheel Arch or spare wheel build?
Post by: lordbigsack on 03 April 2008, 21:46
Any ideas which bits/parts/quantities I would need to make the box. 

Len,  What type and how much gear did you use?

Ta,

Scott

Title: Re: Wheel Arch or spare wheel build?
Post by: Hurdy on 03 April 2008, 23:31
cheers for the info, the write up has helped no-end.  Think I am going to go for the Wheel arch, think it just looks more robust than having the sub in the spare wheel well.  How does the box perform?  do you get a good sound from it.

Just need to find a cheap fibre glass supplier near York!



Sound if anything is better than when it was in the MDF box :cool:
Title: Re: Wheel Arch or spare wheel build?
Post by: Hurdy on 03 April 2008, 23:34
thats very intresting that write just 1 question how do u do the maths to work out how much air is in there

Filled the fibreglass mould with water and then calculated the shortage as a basic rectangle x depth which worked out at around another 30mm build up on top. Took off the reduction in space that the sub would take up in volume and voila. :nerd:
Title: Re: Wheel Arch or spare wheel build?
Post by: leeroy20vt on 04 April 2008, 20:32
thats very intresting that write just 1 question how do u do the maths to work out how much air is in there

Filled the fibreglass mould with water and then calculated the shortage as a basic rectangle x depth which worked out at around another 30mm build up on top. Took off the reduction in space that the sub would take up in volume and voila. :nerd:
cool cheers fella
any 1 seen this done in a mk4
Title: Re: Wheel Arch or spare wheel build?
Post by: Len on 04 April 2008, 21:03
Any ideas which bits/parts/quantities I would need to make the box. 

Len,  What type and how much gear did you use?

Ta,

Scott




I would go for a 5ltr of resin to be safe, with the requisite hardner.
Matting - well go for a medium as you may want to bend it and the heavy ones wont!
I would still look at putting some plywood or MDF in there as stiffening where you can, but thats up to you.
Title: Re: Wheel Arch or spare wheel build?
Post by: lordbigsack on 07 April 2008, 13:28
Cheers for that, I am gonna get it ordered in the next few days.

Do you need to put any wadding or acoustic material inside the box to avoid echoing or distortion? 

cheers,

Scott
Title: Re: Wheel Arch or spare wheel build?
Post by: Ben Lessani on 09 April 2008, 17:53
Argh, don't buy from Halfords £Â£Ã‚£ - for their £20 kit, I could get it for you for £4 for Maccess! And even still, its crappy - steer clear of any F/G that uses pink paste as hardener, MEKP is much better.

These guys are very well priced, http://www.allscotltd.co.uk/ . Half of the boatyards up here use them as a supplier!

http://www.talkaudio.co.uk/vbb/showthread.php?t=76606