Redesign Syncro skid bars to protect Smallcar Cast oilpan

[Crankey]

[Sodo]

Whoa Crankey, you’re willing to share your favorite industrial dumpster with me?
I’ll be your best friend. 🤣🤣
_________________


'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[Crankey]

[Sodo]

Doing its job.
Ida been in deep kaka without it.
Basically wouldn’t be able to drive in the rocks (as I did).
Concavity likely ushers the rocks towards the dimpled holes at the corners.

Also added a little 45deg ‘fairing’ to help it glance off or lift over a stump, rather than hook on it.
_________________


'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[4Gears4Tires]

Not bad for using what you already had laying around! Looks good.
_________________
'87 Syncro
Ferric Oxyhydroxide Superleggera Edition

[Sodo]

OK I cheapened out and tried to use a couple sockets for "dimple dies".
It sorta worked.

Here's a good one and a not-so-good one.
Was difficult to center one socket ontop of the other.
_________________


'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[4Gears4Tires]

My line of thought was the width of the work piece. My press has a 22" opening, which I think is fairly standard. If it's narrower than that, definitely get the die.
_________________
'87 Syncro
Ferric Oxyhydroxide Superleggera Edition

[Sodo]

[syncrodoka]

Dimple die AKA speed holes

[Sodo]

Ain't following you there.....what benefit are dimples?
They wouldn't let the rocks out.
_________________


'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[4Gears4Tires]

Could you take that piece to a machine shop and get a few 1" dimples in it?
_________________
'87 Syncro
Ferric Oxyhydroxide Superleggera Edition

[Sodo]

Skid bars seem to be working good, but I haven't drug it over anything big & hairy yet.

But I did drive on LOTS of gravel this past month, about 6,000 miles of it.

As expected, the pan collects & holds a LOT of gravel.
Rocks wedge themselves into the cooling airspace between the case oilpan and the skidplate.
I thought about a screen to block the rocks from getting in, but that seems like it adds too much trouble, and reduces oil cooling.
A waterboxer already has trouble shedding oil heat.

I didn't want to weaken the membrane of the flat plate but clearly I'm gonna have to drill some holes.
Slamming onto a rock below could punch a little one into the cast oilpan & crack it.
_________________


'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[FrankenSubySyncro]

Looks good Tom!
_________________
Syncronize it!
1987 Franken Syncro (converted 2WD auto)
2004 2.5 SOHC Subaru
F & R lockers, decoupler, SS, 6.17 R&P
Trans Cooler
EMPI race prepped 930 CVs and axles
Bilstein coilover front, rear ProComp MX-6066R shocks, 14" hypercoil springs
30x9.5 15" BFG Muds
Custom skid plates
Nose job (custom front bumper) http://www.flickr.com/photos/subyvanagon/sets/72157624970330925/

[4Gears4Tires]

I missed the end of your tow bar thread, that's pretty cool. I like the little skid plate wings you built to protect the exhaust manifold. Great idea.
_________________
'87 Syncro
Ferric Oxyhydroxide Superleggera Edition

[Zeitgeist 13]

I troll because I love. Be sure to use your skills for good and not evil.
_________________
Casey--

'89 Bluestar ALH w/12mm Waldo pump, PP764 and GT2052
'01 Weekender --> full camper
y u rune klassik?

[Sodo]

Go easy fellas, Casey appears to be unseasonably 'content' this spring!
Maybe he went to remarry his wife last night and noticed a WRX in the driveway.
And took a little ride.
Just to prove how substandard it was, of course.
... a bite from the 🍎 Fuji apple.🍎

OK that's enough - a little gearboy chat oughtta dampen the current titillation (it always does).

=============

Here's the cross-section of the skid bars
new = 1.5 x 1.5 x .120
old = 1.6 x 1.2 x .100

The Ix is called "area moment of inertia" and directly relates to the "stiffness" in the up/down bending axis;
New bar Ix=.21 and the OEM Ix=.11.
The new bars are double the "strength" (&40% heavier).

=======edit=======
This is not "failure strength" better called "twice the stiffness".
If'n you fellers need to self-engineer 'stiffness' someday (again,,,it's not failure strength!!)
Here's the link to the "area moment of inertia" calculator.
https://calcresource.com/moment-of-inertia-rtube.html
_________________


'90 Westy EJ25, 2Peloquins, 3knobs, pressure-oiled GT mainshaft, filtered, cooled gearbox
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
....KTMs, GasGas, SPOT mtb

[Jake de Villiers]

[wesitarz]

^^ Can't get over the fact that the Japanese took that sad 2.1 VW WBX to the next levels.

[Zeitgeist 13]

Your fabrication skills are mighty impressive. Once you get yourself a real engine, the van will be similarly impressive. [poke]
_________________
Casey--

'89 Bluestar ALH w/12mm Waldo pump, PP764 and GT2052
'01 Weekender --> full camper
y u rune klassik?

[Sodo]