Having gotten their hands on a K2XX-based 2014 Chevy Silverado with the 5.3L V8 L83 engine, the fine lads at Lingenfelter did what everyone does upon first buying a truck — and gave it the dyno treatment on the Dynojet 248, reports GM High Tech Performance. Since this is one of the very first third party tests of the new Gen V Small Block L83 V8 (undoubtedly to serve as the baseline for the firm’s upcoming line of performance upgrades to the new Silverado), the results of the study are of particular interest.
When running on 93-octane fuel with 9 percent ethanol, the L83 was good for 307 horsepower at 5200 RPM, and 332 lb-ft of torque at 4200 RPM. But when running on a blend of E85 and gasoline, those numbers climbed to 321 horses and 355 lb-ft of torque — all using the standard 6L80E gearbox. Expectedly, the E85 blend gave the truck quicker 0-60 and quarter mile times.
| METRIC | 93 OCTANE | E85 BLEND |
|---|---|---|
| POWER HP / kW @ RPM: | 307 / 229 @ 5200 | 321 / 240 @ 5200 |
| TORQUE LB-FT / Nm @ RPM: | 332 / 450 @ 4200 | 355 / 480 @ 4200 |
| 0-60 MPH SECONDS: | 7.5 | 6.96 |
| QUARTER MILE SECONDS @ SPEED: | 15.94 @ 90.7 | 15.51 @ 93.5 |
For comparison, here’s are the official output specs of the L83 V8 from GM:
| METRIC | OCTANE | E85 BLEND |
|---|---|---|
| POWER HP / kW @ RPM: | 355 / 250 @ 5600 (gas – SAE certified) | 380 / 283 @ 5600 (E85 – SAE certified) |
| TORQUE LB-FT / Nm @ RPM: | 383 / 519 @ 4100 (gas – SAE certified) | 416 / 564 @ 4100 (E85 – SAE certified) |
Can’t wait for to see real-world 6.2 liter LT1 dyno results for the 2014 Corvette C7 Stingray? Neither can we.
Comments
So after saying (it would take a while for anyone to crack this jewel of an engine) they are going take a stab at it, good for them!
I would hate for some tech kid (with a laptop) working in a garage some where to make them look silly!
Where have read that before?
Sit down, Richard.
Just sit the f&^k down and shut the f&^k up.
It will not take some long to upgrade this engine. Callaway and Lingenfelter also inside help from GM since they have worked with GM in the past.
It may be a new engine but the principals are the same. Generally it is a matter of just getting the parts to do the upgrades. If you can make your own cams and port your own heads and intake it is not that hard.
Not sure if I would spend a ton for a mod pick up unless it was lowered and made to handle or enhanced for more off road abilities with suspension upgrades.
@wbodyfan hahahahaha, atta boy!
Are their power numbers flywheel or at the rear tires? I imagine the numbers from GM are at the flywheel.
Well, I see a truck on a dyno in the picture, not an engine. If those number are RWHP, that’s stout.