5.3 vs. 6.0
Posted 06 May 2010 - 08:41 AM
I know that the Vortec 5.7 swap is the easiest route since the engines are the most similar to the 4.3, but those are getting hard to find in my area because the bubbas around here run them until they explode (sometimes literally). So that got me to thinking, which LSX engine would be better suited for my Z? The 5.3 seems like the obvious choice but what about the 6.0? Everyone says theres no replacement for displacement, but every 6.o Ive ever owned drank gas like it was free. Would it still guzzle gas in this small of a truck? Basically heres what Im thinking.
lighter weight, better fuel mileage, Potential for multi displacement system...................
More HP, More Tq..........................
Now you guys chime in. I want everyones $.02 on which LS based engine is better and why.
Posted 06 May 2010 - 09:13 AM
Posted 06 May 2010 - 09:27 AM
I was able to get my 5.3 for 350 bux with the harness/ecm. just gotta look around and be ready to buy as soon as something pops up, if you wait around you will miss it.
I say go with the 5.3 and throw some good parts at it.
Posted 06 May 2010 - 09:52 AM
Posted 17 May 2010 - 02:48 AM
Posted 17 May 2010 - 05:25 AM
Posted 17 May 2010 - 05:11 PM
I've looked at the 6.2 556hp, and unless your rpm's are over about 4200 it's not much for the money. Look at the curve in the link. I don't think it's suited to a truck. It probably has a wildl y low 40 to 70 mph time for passing, but if it ain't revved to the moon, it ain't much. So it appears to be for throttle stomping. The non-turbo has a flat torque curve, better suited, and half the price.
Edited by ducksface, 17 May 2010 - 05:13 PM.
Posted 17 May 2010 - 05:34 PM
Posted 17 May 2010 - 07:49 PM
Kool. Ill be looking for a 5.3 if I cant find a 5.7 to suite me. Thanks. Feel free to keep up the discussion though.
Posted 17 May 2010 - 07:52 PM
Posted 17 May 2010 - 08:03 PM
Posted 17 May 2010 - 08:50 PM
Posted 17 May 2010 - 09:03 PM
Posted 17 May 2010 - 10:01 PM
Edited by tyhuck, 18 May 2010 - 07:46 AM.
Posted 18 May 2010 - 11:25 AM
Posted 18 May 2010 - 11:27 AM
Posted 18 May 2010 - 12:39 PM
I have an 8.1 in the 2004 3/4 ton Avalanche. The horse power and torque ratinga aren't what you would expect, but it pulls really hard off the line, stays flat till about 5k rpm, and doesn't hunt for a gear going up hill. I get about 13mpg
MY 2003 5.3 avalanche gets 15ish. We use up a vehicle, we couldn't care less about mpg
Posted 18 May 2010 - 01:05 PM
I guess thats according to how you look at it. Im not agreeing or disagreeing with you. I was just told the info I stated earlier by a dealership mechanic. Im not saying hes right because hes a mechanic, Im just staing thats where I got my info. He may have been comparing power numbers to make his assumption. The way he explained it, they downsized all their motors and then added the 8.1L. Again, he may have been wrong, and honestly, I dont care one way or the other whos right. This whole post is just to explain my train of thought so I dont look like too much of an idiot. Which, now that I think about it, it may make me look more like an idiot. Oh well,
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