Sump Guard

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Sump Guard

Postby neo » Tue Mar 31, 2009 10:48 am

Hey all,

What thickness sump guards to people usually run in their rally cars? (and then alloy or steel).

I have a massive piece of 2.5mm alloy tread plate (treads being 5mm in total), however I can just bend this by hand. Would this suffice?


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Postby strx7 » Tue Mar 31, 2009 11:13 am

its be GREAT, will double as a road grader but yeah definitly protect the sump
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Postby pjay » Tue Mar 31, 2009 11:24 am

Yup 2.5mm is fiiine. Mines 5mm on the beema and shit does she grate over the judderbars/downtown carparks
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Postby Boost_4_Life » Tue Mar 31, 2009 11:55 am

i run 3mm with no probs, 2.5mm should be fine. just make sure the mounts are solid as. i dented my sump last year when the whole guard got punted back into the sump after landing a jump cos the mounts bent
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Postby neo » Tue Mar 31, 2009 12:57 pm

strx7 wrote:its be GREAT, will double as a road grader but yeah definitly protect the sump


Ahh not as think you dumb I am..

I be putting the grated side facing the sump :wink:
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Postby strx7 » Tue Mar 31, 2009 1:14 pm

Boost_4_Life wrote:. just make sure the mounts are solid as.


That is the KEY, need to be pretty inventive on some cars to get good mountings
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Postby fangsport » Tue Mar 31, 2009 3:55 pm

neo wrote:i be putting the grated side facing the sump :wink:


would go the other way. if the checker pattern rubs against sump,it will wear through , whereas smooth side is less likely to rub through sump material.
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Postby DexGT » Tue Mar 31, 2009 5:22 pm

Are you going off road rallying , or just protecting the sump on road ? , 2.5mm is probably fine for on road , I would be looking at 5 mm for gravel .
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Postby Lloyd » Tue Mar 31, 2009 5:46 pm

As above, thicker for gravel stuff if you can
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Postby Mr Revhead » Tue Mar 31, 2009 10:09 pm

yeah 5mm for anything that will actually spend its life fending off rocks and gravel.
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Postby neo » Tue Mar 31, 2009 10:11 pm

The plan is to do gravel sprints..

So more alloy is needed :cry:
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Postby Mr Revhead » Tue Mar 31, 2009 10:14 pm

also mount it as far away from the sump as possible, seems obvious but thought i'd mention it anyway :P
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Postby Bling » Tue Mar 31, 2009 10:24 pm

Can you just double up the 2.5mm plate? rivit the crap out of it and hey presto, 5mm plate :lol:
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Postby fangsport » Wed Apr 01, 2009 4:20 pm

neo wrote:The plan is to do gravel sprints..

So more alloy is needed :cry:


only fitted 2.5/3mm plate to the Levin to do rallies. has had plenty of abuse but never contacted the sump, even after all the re-run Otago stages. done more damage to it cutting the bejesus out of corners on tarmac :twisted:
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Postby pc » Wed Apr 01, 2009 5:16 pm

I've got a 5mm sump guard and quite often have to 'bend' it back to shape with a 16 pound sledge hammer.
My car needs to be higher for gravel, but I still wouldn't go below 5mm.
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Postby TRD Man » Thu Apr 02, 2009 10:41 am

Design is more important than thickness. Some sump guards are made of composite materials and still perform adequately.

Use the 2.5mm material because you already have it (and aluminium is not cheap to buy) but look at areas where you can double layer it.

Many gravel roads have a raised knoll in the middle and your sump guard will at times act like a grader. Consider this in your design.
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Postby strx7 » Thu Apr 02, 2009 12:14 pm

I'll be building one for my SE104 in a month or so and will be looking at running some RHS or Right angle 3mm steel reinforcing in it in places where should it bend up it wont hurt anything
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