Tuned 5.3 compared to 5.7 vortec?
#1
Tuned 5.3 compared to 5.7 vortec?
I'm about to buy my first LS powered truck. I have always thought the 5.3 engines were unresponsive and mushy compared to 5.7 vortecs and especially the TBI motors I've owned.
How much does a tune and deleting 95% of the torque management make a 5.3 react? Looking at a factory dyno, they make comparable low end tq. Hell the TBI was only 300 ft/lbs peak.
How much does a tune and deleting 95% of the torque management make a 5.3 react? Looking at a factory dyno, they make comparable low end tq. Hell the TBI was only 300 ft/lbs peak.
#5
Turning up the throttle sensitivity will help I'm sure.
I'm mostly curious about the low end torque. I spend 90% of my time under 2k rpms. Just how I drive.
As far as the TM, I don't have alot of faith in the 4l60 (5?). Pre 07 truck. Some last 250k stock some burn em up in 75k. I don't tow heavy loads much with a light duty truck. That's another topic entirely but I'm mostly curious in the torque characteristics.
Thanks for replies.
I'm mostly curious about the low end torque. I spend 90% of my time under 2k rpms. Just how I drive.
As far as the TM, I don't have alot of faith in the 4l60 (5?). Pre 07 truck. Some last 250k stock some burn em up in 75k. I don't tow heavy loads much with a light duty truck. That's another topic entirely but I'm mostly curious in the torque characteristics.
Thanks for replies.
#6
TECH Senior Member
iTrader: (5)
There is no comparison... power, longevity, mileage.... Even on stock tune the 5.3 IMHO has more power than any of the vortec sbc engines ever did... a cam change and tune makes ridiculous power increases comparatively.....seems the average mileage on a bone stock 5.3 is around 250k and going.... Try that with an untouched 5.7
#7
There is no comparison... power, longevity, mileage.... Even on stock tune the 5.3 IMHO has more power than any of the vortec sbc engines ever did... a cam change and tune makes ridiculous power increases comparatively.....seems the average mileage on a bone stock 5.3 is around 250k and going.... Try that with an untouched 5.7
Just to clarify what the purpose of my question is, I simply want to upgrade to a better truck (01-06). Looking for a super low mileage clean one. They're about $10-13k here. I would love it if the 5.3 can perform the same if not better under 2k rpms as a 5.7. I really want to avoid the rougher ride of a 2500 and the poor mileage. The hp of any truck engine is plenty for me.
I know there was the SS which I think was a 6.0 in a half ton. Hard to find those.
So I'd like to know how the 5.3 compares tq wise under 2k rpms to the 5.7. If I have to do a cam swap, I'll just swap in an LQ4. I have an LY6 but that's for a car project. I'd rather run a cathedral port head anyway. And advance the cam. Maybe more lift and tighter LSA, stock duration. There I go getting sidetracked again...
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#9
TECH Enthusiast
Just to clarify what the purpose of my question is, I simply want to upgrade to a better truck (01-06). Looking for a super low mileage clean one. They're about $10-13k here. I would love it if the 5.3 can perform the same if not better under 2k rpms as a 5.7. I really want to avoid the rougher ride of a 2500 and the poor mileage. The hp of any truck engine is plenty for me.
I know there was the SS which I think was a 6.0 in a half ton. Hard to find those.
I know there was the SS which I think was a 6.0 in a half ton. Hard to find those.
Richard
#10
I need 4x4. I guess there was a model that did have a 6.0 1500 with 4x4. Like an SS but without exterior changes. Kinda rare. The SS is rare here in michigan. Not too many 2wd trucks.
I'll stick with a 5.3. If I don't like it, maybe I'll put a 4BT cummins in it or a JD 4045
I'll stick with a 5.3. If I don't like it, maybe I'll put a 4BT cummins in it or a JD 4045