What did you do to your NNBS GMT900 Tahoe/Yukon Today?

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Greg Kulbick

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Just in case anyone is interested, the torsional stiffness varies by the fourth power of the diameter. Put another way, if you keep everything else the same (bar length, material, etc.), and just vary the diameter of the bar, doubling the torsional stiffness of the bar requires only a 19% increase in the diameter.

Because the outside diameter has such a large influence on stiffness, a hollow bar doesn't lose as much stiffness as you'd think, because the material toward the center doesn't contribute very much. Using the example above, if a 1.19" bar is twice as stiff as a 1" bar, a hollow bar with 1.19"OD and 1"ID is just as stiff as a solid 1"OD bar, but only weighs 42% as much (if I did the math right).
I was told there'd be no math.
 

akbrener

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Can anyone recommend a brand of split loom they know to be durable for under hood use? The OEM wire harness loom around the engine is in terrible shape from becoming brittle and a lot of it is completely gone.

On previous projects I’ve used whatever was handy but given the poor performance of what GM used it’s got me thinking about the (lack of) durability of Chinese plastics.

I don’t mind the price for quality stuff. Rather do it once and do it right.

Thanks in advance for any recommendations.

Actually I went to Harbor Freight and got a bunch of their stuff and got some black wrap tape from amazon, not electrical tape.. its a sticky shrink wrap. Been going strong for about 4-5 years. HF only has up to 1/2" but that was good enough for everything except the main harnesses which had not crumbled away
 

Monz11

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Can anyone recommend a brand of split loom they know to be durable for under hood use? The OEM wire harness loom around the engine is in terrible shape from becoming brittle and a lot of it is completely gone.

On previous projects I’ve used whatever was handy but given the poor performance of what GM used it’s got me thinking about the (lack of) durability of Chinese plastics.

I don’t mind the price for quality stuff. Rather do it once and do it right.

Thanks in advance for any recommendations.


I used Summit braided wire loom, to redo the entire engine compartment, when I yanked out the engine an dtrannt last year. Its cheap and comes in decent lengths and in both black and Chevy orange (UGLY)!
https://www.summitracing.com/parts/sum-890341

I suggest getting the easy wire loom tool, make sit easy to slide right on. I also used 4" zip ties to hold the long lengths together
https://www.summitracing.com/parts/dei-011009
 

Monz11

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I used Summit braided wire loom, to redo the entire engine compartment, when I yanked out the engine an dtrannt last year. Its cheap and comes in decent lengths and in both black and Chevy orange (UGLY)!
https://www.summitracing.com/parts/sum-890341

I suggest getting the easy wire loom tool, make sit easy to slide right on. I also used 4" zip ties to hold the long lengths together
https://www.summitracing.com/parts/dei-011009
I also live in Florida so all of mine was cracked and busted, so I didnt want to deal with the plastic crap anymore
 

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