Other than cubic inches and some performance, what are some differences between the 4.8 and 5.7? My reason for asking is that I'm thinking about getting a '99-'02 Silverado.

Another question, as far as mods go, with either motor I would be looking at doing exhaust, intake, tune, etc. What kind of numbers might I be looking at as far as hp/tq?

 

do you mean the 5.3? because the 5.7 was only in the obs trucks

 

yea its either a 4.8 or 5.3 in the 99-up trucks

unless you upgrade to the 6.0

well from the factory the 5.3 was rated 10 hp and about 30tq better than the 5.3 and from experience the 5.3 definetely pulls harder than the 4.8

 

although some guys do LS1 swaps, our trucks are only offered with the 4.3, 4.8, and the 5.3

 

So the 5.7 stopped in the '98? I didn't realize that.

Then yeah, the 5.3 would be correct.

 

nightrunner and 01Blue4.8, how are your setups working?

 

4.8 and 5.3 are the same bore, 5.3 is just a longer stroke. If you plan on modding the motor the 5.3 will respond better to whatever you do.

 

So, I would literaly get more bang for the buck?

 

could you explain more of what you mean

everything works fine although when i first bought it a few months ago i dropped it into 1st manually and punched it and spun alittle and forgot it was in first and it went 6krpm++ and shot the water pump pulley and fan into my radiator and ended up costing me $400 on a 150k mile engine but thats about it

has plenty of power for a daily driver and it responds well to minor boltons from what i read/hear

im shifting at 5800-5900rpm (superchips) and it shifts to 3rd at 90mph

mine does fine but im looking for a lower mileage truck to do many mods to( under 90kmiles)

id suggest not going over 100k on miles cause most everything is worn out ( excluding motor) is getting there on mine

 

most definetely , for example, the fastest N/A 4.8 on here is runnin abut a 13.2 that is full boltons, cam, head work, gears, stall, etc. and the fastest N/A 5.3 on here is runnin a 12.51 with boltons, cam, gears, stall

is the intake exhaust and tune all you will do if so definetely get a 5.3 if not you MIGHT get a 4.8 cheaper if you plan a motor swap later on