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phlat65
Sean Medcroft
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Location: Edmonds, Washington
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Rally Car:
Building a Merkur


Skid plate install
November 30, 2009 08:37PM
Posted these on the Merkur forum, figured I would post them here.

Front mount is .125 wall 1.5inch square tube, the verticals are welded to a plate, that is welded to the bottom of the frame rails, and the sides of the verticals have weld nuts in them, and are bolted to the JVAB tow hook/ Jack point/ skid plate mount ting, that is thick alloy plate. The plate is bolted to the frame rail in 3 spots.




the rear skid plate mounts. I made an extension that comes down Vertically from the frame rail, welded a plate to the rail, welded the extension to the plate, capped the open end with a 10x1.5 weld nut on the backside of the plate. That is the black piece (hard to see)

The white horizontal part, bolts to the back of the crossmember, and bolts to the vertical. It has a 10x1.5 weld nut in it for the skidplate.




The skid plate is a Kevlar one that came off of an evo8. it was cracked in the front from a tree impact. I cut out all of the damage, I did not need that part anyway. Trimmed off the vertical side pieces. it is secured with 4 bolts, all 4 are recessed about an inch. It is burly




And my $80 light bar


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Rallymech
Robert Gobright
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91 VW GTI 8V


Re: Skid plate install
December 01, 2009 10:00AM
Sean,

You are one productive mofo!



Robert.

"You are way too normal to be on Rally Anarchy." Eddie Fiorelli.
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eyesoreracing
Dave Coleman
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Re: Skid plate install
December 01, 2009 10:27AM
See, something good does come from all these EVOs and WRXs. Cheap leftover parts!
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john vanlandingham
John Vanlandingham
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Re: Skid plate install
December 01, 2009 10:30AM
eyesoreracing Wrote:
-------------------------------------------------------
> See, something good does come from all these EVOs
> and WRXs. Cheap leftover parts!

If only the silly boys driving them would use tires appropriate to their degree of driving like 15/65 x 15 or 16/64 in stead of the hugest fattest HEAVIEST thing they can find, then there'd be more nice tires for use guys...




John Vanlandingham
Sleezattle, WA, USA

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Morison
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Re: Skid plate install
December 01, 2009 11:09AM
phlat65 Wrote:
-------------------------------------------------------
...Trimmed off the vertical side pieces. it is secured with 4 bolts, all 4 are
> recessed about an inch. It is burly

You do realize that the vertical side pieces add a whole bunch of torsional rigidity to the skid plate don't you? Particularly if it is unsupported between the front and rear mounts I think you'll be disappointed in its performance if you ever put it to the test.

You'll also want to try and seal your cuts with resin - Kevlar is hugely absorbent and the skidplate will destroy itself in no time if it isn't sealed. The mounting points will be vital. (the kevlar will expand and contract with damp/dry and the resin will come apart making the area weak.)

(and before anyone writes this off as the ramblings of just a photographer - I have a lot of experience with light weight composites from my r/c glider hobby.)



First Rally: 2001
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Quote
john vanlandingham
Blame is for idiots. losers.
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phlat65
Sean Medcroft
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Location: Edmonds, Washington
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Building a Merkur


Re: Skid plate install
December 01, 2009 02:20PM
it is supported in 2 other places between the mount holes. Im know the side pieces added rigidity, they just would not fit in my car.

BTW, found out that skid plate was $3500.00 new. hows that for overkill....
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Andrew_Frick
Andrew Frick
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Re: Skid plate install
December 01, 2009 02:20PM
How thick are the JVAB tow hook support things?

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john vanlandingham
John Vanlandingham
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Re: Skid plate install
December 01, 2009 03:31PM
Andrew_Frick Wrote:
-------------------------------------------------------
> How thick are the JVAB tow hook support things?
>
>
The sumpguard front support/jacking point/tow points are 3/8" thick.






John Vanlandingham
Sleezattle, WA, USA

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www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
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eyesoreracing
Dave Coleman
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Mazda3, SE-R Spec-V, 510



Re: Skid plate install
December 01, 2009 04:45PM
phlat65 Wrote:
-------------------------------------------------------
> it is supported in 2 other places between the
> mount holes. Im know the side pieces added
> rigidity, they just would not fit in my car.
>
> BTW, found out that skid plate was $3500.00 new.
> hows that for overkill....


Shit, that's more than my whole rally car!

How much was it used?

-Dave
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phlat65
Sean Medcroft
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Re: Skid plate install
December 01, 2009 05:31PM
Free...
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Dazed_Driver
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Re: Skid plate install
December 01, 2009 05:48PM
phlat65 Wrote:
-------------------------------------------------------
> it is supported in 2 other places between the
> mount holes. Im know the side pieces added
> rigidity, they just would not fit in my car.
>
> BTW, found out that skid plate was $3500.00 new.
> hows that for overkill....


Yeah, GOOD composite materials are not cheap. Especially when you get into aerospace grade prepreg stuff. Composites Engineering I would think is pretty lucrative, as well.




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eyesoreracing
Dave Coleman
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Re: Skid plate install
December 01, 2009 06:38PM
phlat65 Wrote:
-------------------------------------------------------
> Free...


I love being on the right side of depreciation!

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david amor
david amor
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Re: Skid plate install
December 01, 2009 08:05PM
$3500 that's silly. Kevlar is cheap (all things being relative. It IS way more than Aluminum) I could make that skid plate for $500 AND make a profit. You should find a local source for Kevlar and GOOD resin. You can sand/grind it down and lay on a couple more layers when it gets even more chewed up than it is.



Gone fishing
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Dazed_Driver
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Re: Skid plate install
December 01, 2009 08:39PM
david amor Wrote:
-------------------------------------------------------
> $3500 that's silly. Kevlar is cheap (all things
> being relative. It IS way more than Aluminum) I
> could make that skid plate for $500 AND make a
> profit. You should find a local source for Kevlar
> and GOOD resin. You can sand/grind it down and lay
> on a couple more layers when it gets even more
> chewed up than it is.
>
> "this is certainly not a game for flyweights or
> ping-pong players-all arguments to the contrary"
> -C.B.


design, material, tooling, vacuum bagging, possibly autoclave

it all adds up.



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david amor
david amor
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Re: Skid plate install
December 01, 2009 11:08PM
Dazed_Driver Wrote:
-------------------------------------------------------
> david amor Wrote:
> --------------------------------------------------
> -----
> > $3500 that's silly. Kevlar is cheap (all
> things
> > being relative. It IS way more than Aluminum)
> I
> > could make that skid plate for $500 AND make
> a
> > profit. You should find a local source for
> Kevlar
> > and GOOD resin. You can sand/grind it down
> and lay
> > on a couple more layers when it gets even
> more
> > chewed up than it is.
> >
> > "this is certainly not a game for flyweights
> or
> > ping-pong players-all arguments to the
> contrary"
> > -C.B.
>
>
> design, material, tooling, vacuum bagging,
> possibly autoclave
>
> it all adds up.
>
> Feisty Peacock?
>
>


Since I already have all that, it's already added up and paid for. You think that skid plate is autoclaved? Really? You don't have to vacum bag it to add a couple of "wear" layers either.



Gone fishing
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