TRT, Tow Rig Tuesday...show what ya tow

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4OFFSHR

4OFFSHR

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That Formula was probably close to 15K pounds and I was surprised how well the 5.3 2wd pulled it, even launching and loading...no problem. Thankfully the trailer had good brakes...that boat felt like a freight train rolling behind me! LOL!

20130718_113318.jpg
 

swathdiver

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That explains my lackluster towing with the 2007 Suburban 5.3

Maybe. The horsepower was nearly the same, the peak torque was lowered 400 rpms with VVT. I reckon the biggest difference was the transmission. For even with a 4.10 gear behind the 4L65 the final drive in 1st gear was only 12.54:1 compared with 13.77:1 for a 2009+ with the 6L80 and 3.42 gear. Most folks however had the 3.73 gear which was 11.41:1 just to get the load moving.

A mileage comparison between years shows the big difference coming with VVT, not the 6-speed. VVT was a great addition to these engines. By using it, GM changed the camshaft from a single pattern to dual pattern with more duration.
 
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Big Mama

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Wow! I was gonna show my puny 4500 lb 23 foot Wellcraft but I’ll hold off. You win and yes thank God for trailer brakes.
 
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4OFFSHR

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Wow! I was gonna show my puny 4500 lb 23 foot Wellcraft but I’ll hold off. You win and yes thank God for trailer brakes.
Come on, you gotta show pics...the 29 is my second Wellcraft, had my first that was a 22 in 97, was a fun boat, and it hauled ass, way faster than the 29.
 

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