5.3 engine Complete! 500$

[1BADC10]

Not much difference b/t the 4.8 & 5.3. Same bore, different stroke, 10hp more and about 25lbft torque (w/ 5.3). You'll notice a slightly faster pick-up from a dig with the 5.3, but is it really worth the swap hassle... that's for you to decide. 10hp/20lbft torque for $500 & 20hrs of labor. Worth your time or what?

Tuning for a 5.3 (stock-ish) is as easy as scaling the correct cyl volume, designating engine size, and airflow values for a smoother idle & driveability. Been there done that... ask me about a Yukon that blew a stock 5.3, and went to an auction with a perfectly running 4.8.

[BlenderWizard]

<div class='quotetop'>QUOTE(1BADC10 &#064; May 6 2007, 12&#58;58 PM) [snapback]92496[/snapback]</div>

Not much difference b/t the 4.8 & 5.3. Same bore, different stroke, 10hp more and about 25lbft torque (w/ 5.3). You&#39;ll notice a slightly faster pick-up from a dig with the 5.3, but is it really worth the swap hassle... that&#39;s for you to decide. 10hp/20lbft torque for &#036;500 & 20hrs of labor. Worth your time or what?

Tuning for a 5.3 (stock-ish) is as easy as scaling the correct cyl volume, designating engine size, and airflow values for a smoother idle & driveability. Been there done that... ask me about a Yukon that blew a stock 5.3, and went to an auction with a perfectly running 4.8.
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20hrs?&#33;?&#33;?&#33; Granted, I&#39;ve never swapped a LSX engine but I&#39;ve never had an engine swap take that long. Do these really take that long to change?

[1BADC10]

<div class='quotetop'>QUOTE(BlenderWizard &#064; May 10 2007, 09&#58;20 PM) [snapback]93052[/snapback]</div>

20hrs?&#33;?&#33;?&#33; Granted, I&#39;ve never swapped a LSX engine but I&#39;ve never had an engine swap take that long. Do these really take that long to change?
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I&#39;m counting the time I walked outside, and popped the hood until I closed it with a running vehicle. I guess I should&#39;ve mentioned that I only had a second set of hands become available for a couple of hours. The vast majority of this was me working by myself in my driveway. Had I had help the entire time, this could&#39;ve been done (start to finish) in a day. I took my time to label and bag bolts and stuff b/c my memory isn&#39;t what it used to be. Besides... I don&#39;t feel so bad about the time extent. At a dealer&#39;s rate of AT LEAST &#036;85 /hr for 20 hours of work, it would have cost at least &#036;1700 in labor. I was actually quoted &#036;6740 for a new long block, labor, and misc shop supplies. My replacement long block cost me &#036;150 and a case of beer that I ran through while doing this swap-out.

It&#39;s not hard to do an LSx swap, it&#39;s just tedious when you have all the electrical knick-knacks to pull out of the way. On an SBC setup, there&#39;s not as much to deal with. Heck, I had my old 4.3L out of my pickup in a matter of a couple of hours (after work on a Friday). It took about an hour just to get the vac lines, minimal wiring and front drive accessories out of the way, unbolt the trans & TC, then yanked it out. With the LSx motor, I pulled as much as I could off the block before I yanked it out b/c I didn&#39;t want to damage the harness or anything else. Better safe than sorry.

Anyhoos.... BACK ON TOPIC HERE&#33; Saw an S10 for sale in my subdivision on the way home. If I didn&#39;t have my truck, I&#39;d seriously consider a 5.3L-powered S10. Could be the next S10-K. LOL bump for a good price.