# Just WATCHED a truck roll over

**URL:** <https://forums.speedlife.net/t/just-watched-a-truck-roll-over/264023>\
**Category:** Shift518 Off Topic\
**Created:** [June 7, 2012, 4:09pm UTC](https://forums.speedlife.net/t/just-watched-a-truck-roll-over/264023 "2012-06-07T16:09:52Z")\
**Posts on this page:** 1\
**Showing post:** 23

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**Author:** ![toomanycamaros](https://avatars.discourse-cdn.com/v4/letter/t/7993a0/32.png) [@toomanycamaros](https://forums.speedlife.net/u/toomanycamaros)\
**Post date:** [June 8, 2012, 7:14am UTC](https://forums.speedlife.net/t/just-watched-a-truck-roll-over/264023/23 "2012-06-08T07:14:20Z")

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> [@Google Streetview released in buffalo](https://forums.speedlife.net/t/google-streetview-released-in-buffalo/49849/7):
>
> I thought they were the same thing

not even close. A Jake physically keeps both intake and exhaust valves closed when your not on the throttle, therefore providing engine compression base braking. The exhaust butterfly style brakes close off the exhaust creating increased back pressure and kind of doing the same thing, but not nearly as much engine braking force.

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