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Old 12-14-2011, 08:51 PM   #31
The Bad Guy

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Read the link I posted back in post number 10. Knocking the bumper will not deploy the air bags, with or without crush cans.

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Old 12-14-2011, 09:03 PM   #32
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Quote:
Originally Posted by NFRs2000NYC View Post

P.S. To the AEV crush can comment....it seems like BS to me. If they are welded on, then how are they "crush" cans? Since they are now part of the bumper, the energy gets transferred right through the welds and into the frame....seems like snakeoil to me.
Have you ever seen one without the plastic cover? They're a corrugated steel cylinder.... Like an accordion. The 'accordion' crushes/absorbs the initial energy of the impact.

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Crush cans only help absorb impact if they are in the impact area. If you hit a pole in the middle of your bumper, or a tree or a rock, what good were they?
Exactly ... That's basically what AEV told me and why I opted to go without and stick jate rings where the crush cans would go. It makes sense: the point at which the bumper mounts directly on the end of the frame rail is the most unforgiving place with regards to transmitting impact force into the frame.

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Old 12-15-2011, 09:43 AM   #33
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Quote:
Originally Posted by daggo66 View Post
Crush cans only help absorb impact if they are in the impact area. If you hit a pole in the middle of your bumper, or a tree or a rock, what good were they?
Absolutely correct, they would be of no use. That's why some bumpers' mount to the frame is engineered to crush and any frontal impact is absorbed as the bumper is pushed back to achieve the same function of lowering force. Lot's of vehicles with mounts like this.

Given their purpose and limitations, and for me personally,

Would I buy a bumper for my Jeep based on no consideration other than if it had crush cans or not?

No.

If the bumper I decided on didn't have crush cans, would it be a big deal, cause of concern to me?

No.

If the bumper I wanted had optional crush cans available would I buy them?

Depends on price for the cans; $100-200-probably yes, $500-nope.

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