U-bend??? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-20-2004, 09:28 PM   #1
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Default U-bend???

Bonnevilles do not have a U-bend like the GP'* is that correct?
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Old 02-20-2004, 09:34 PM   #2
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Correct
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Old 02-20-2004, 09:35 PM   #3
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No we dont have a u bend like the gp'* but between the cat and resenator there is jog of sorts that could be straightend.
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Old 02-20-2004, 10:36 PM   #4
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That little jog is only on the 00+ I believe. Mine'* a straight shot.

All W bodies have the Ubend...Impala, MC, GP. That'* what costs them the 5hp and 5tq.
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Old 02-20-2004, 10:41 PM   #5
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Quote:
Originally Posted by willwren
That little jog is only on the 00+ I believe. Mine'* a straight shot.

All W bodies have the Ubend...Impala, MC, GP. That'* what costs them the 5hp and 5tq.
On the N/A models. The supercharged models have the same stated power output as the GTP'*.

Shawn
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Old 02-20-2004, 11:53 PM   #6
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I think the U-Bend is just because the GP is smaller. Us Bonnies are bigger, and dont' require it.
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Old 02-21-2004, 01:02 AM   #7
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I thought it was to protect one of the O2 sensors so that it is not damaged by road debris.
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Old 02-21-2004, 01:15 AM   #8
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Quote:
Originally Posted by Glasuan
I thought it was to protect one of the O2 sensors so that it is not damaged by road debris.
That'* the right answer. Though you could argue that because the GP is smaller, they needed to put the U bend in to protect the sensor as there wasn't sufficient space to orient it differently.

Cheers,
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Old 02-21-2004, 01:19 AM   #9
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So...they sacrifice 5 hp and 5 tq in SE and GT GPs in order to protect an O2 sensor

I'm suprised that even got off the drawing board...
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Old 02-21-2004, 01:24 AM   #10
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Quote:
Originally Posted by Jim W
So...they sacrifice 5 hp and 5 tq in SE and GT GPs in order to protect an O2 sensor

I'm suprised that even got off the drawing board...
The O2 sensor is an absolute necessity...anything to make sure it would survive and protect GM against excessive emissions over the 5 year warranty coverage, not to mention being able to properly adjust A/F ratios for better performance.

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