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Bill Brasky
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Danger to manifold!

Ok, so. Like I said, I work at Philmont Scout Ranch in northern New Mexico. We drive around a lot in the back country. It's not ZOMG amazingly difficult four wheeling back there, but it can get a little hairy. We exclusively drive Chevys. We get a ridiculous deal through GM for Suburbans and 2500 HD trucks. Why drive Suburbans off a paved road and onto a 25 degree loose shale slope? Well, we've yet to find an 8 passenger vehicle with enough room for a litter and medic crew (mainly) that has good off-road capabilities for the price we can get. No, the roads don't require a 8 inch lift and 36's and you don't need a locking diff 90% of the time, thus, Suburbans work quite well.

To give you an idea of how much we drive back there, this May through August, we drove 356,312 miles with a total of 52 vehicles. The Ranch is only ~214 square miles.

Sadly, the few people that are allowed to drive in the backcountry can't all be perfect. We wrecked two 2010 Suburbans this year. One driver thought they could go 50mph over a water bar three feet tall and five feet wide. They bent the frame to about a 10 degree angle and left the better half of the front end impacted into the clay and gravel. The other wasn't paying attention when they were backing up a hill to let a Commissary truck (a GM TopKick stakebed filled with food and supplies) by. They ended up falling down the side of the mountain 50 feet till some nice Ponderosa Pines were kind enough to keep him from falling even farther.

The oddest accident yet though happened last week when a staffer was talking on a phone and driving. He ended up crashing into a tree branch. Just the branch.

Up close...


The entire branch.


Sadly, I don't have a pic of the damage before the manifold was removed... It went through the grill and radiator before coming to rest there.
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Old 10-04-2010, 09:08 AM Bill Brasky is offline  
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mohavewolfpup
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the only benefit I see to this is the chevys are getting wrecked versus fords
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Old 10-04-2010, 09:50 AM mohavewolfpup is offline  
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Bill Brasky
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Quote:
Originally Posted by mohavewolfpup View Post
the only benefit I see to this is the chevys are getting wrecked versus fords

fanbois make me giggle
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Old 10-04-2010, 10:00 AM Bill Brasky is offline  
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DopefishLives
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Quote:
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fanbois make me giggle



That's pretty wild; reminds me of the Jeeper whom nearly lost their right to offspring to a tree branch while offroading.
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Old 10-04-2010, 10:25 AM DopefishLives is offline  
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Dongboy
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first pic I was like, wtf part of the car is that, then the second pic it became obvious

thats bananas that it went straight through the manifold and probably didn't really cause any damage besides the obvious
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Old 10-04-2010, 11:55 AM Dongboy is offline  
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_cashel
 
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They ended up falling down the side of the mountain 50 feet till some nice Ponderosa Pines were kind enough to keep him from falling even farther.


I'd probably need a new pair of pants after that one.
Old 10-04-2010, 12:23 PM _cashel is offline  
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That's pretty gnarly...
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Old 10-04-2010, 01:42 PM RazorWind is offline  
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pyramid
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Well there's your problem.

Is that manifold metal or composite?
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Old 10-04-2010, 04:54 PM pyramid is offline  
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Dongboy
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they are composite
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Old 10-04-2010, 05:06 PM Dongboy is offline  
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[H]ard|On
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WOW


yea they are plastic, let's not pussy foot around it... that's fine though, that resists heat soak better and is easier to manufacture with more precision.
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Old 10-04-2010, 05:21 PM [H]ard|On is offline  
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Bill Brasky
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Quote:
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WOW


yea they are plastic, let's not pussy foot around it... that's fine though, that resists heat soak better and is easier to manufacture with more precision.

could you imagine how much that manifold would cost if it was CNC machined aluminum?
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Old 10-04-2010, 05:26 PM Bill Brasky is offline  
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[H]ard|On
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could you imagine how much that manifold would cost if it was CNC machined aluminum?

yea, for no real benefit either.

cnc is rare, most are cast... which is why the plastic ones are near perfect comparatively (no casting seams and burrs inside)
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Old 10-04-2010, 05:27 PM [H]ard|On is offline  
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trajectory
 
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WOW


yea they are plastic, let's not pussy foot around it... that's fine though, that resists heat soak better and is easier to manufacture with more precision.

Plastic manifolds are generally lighter too, right?
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Old 10-04-2010, 05:40 PM trajectory is offline  
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[H]ard|On
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Plastic manifolds are generally lighter too, right?

Yup, that too.
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Old 10-04-2010, 05:43 PM [H]ard|On is offline  
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DopefishLives
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Outside of a high-boost application, plastic is perfect for the reasons Hardon mentioned. Honestly a well designed plastic unit would handle boost just fine as well, but it's a good consideration to move to aluminum/magnesium at that point. The point where most manufacturers falter is with coolant necks made of plastic, which get brittle and break... Ford, VW/Audi, etc, etc, etc...
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Old 10-04-2010, 09:19 PM DopefishLives is offline  
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