2014 Silverado 1500 L83 V8 results
06-18-2013, 05:10 PM
#1
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2014 Silverado 1500 L83 V8 results Here are some results from testing of our shop development 2014 Chevrolet 1500 Silverado 4WD. The truck has the 3.08:1 rear gear, is a crew cab and has the short bed. It weighs 5,340 lbs with 1/8 tank of fuel (and no driver/passenger).
First, here is a chassis dynamometer graph of the truck as we received it. This is tested on our Dynojet 248 chassis dynamometer. We have both a Dynojet 248 and a Mustang MD-1750. We just happened to run it on the Dynojet because the Mustang had another vehicle on it. We get fairly similar results between the two dynamometers.
The abrupt end of the data is due to the factory speed governor.
This is on gasoline (roughly 9% alcohol content according to the on-board alcohol sensor).
307 hp at 5200 RPM and 332 lb-ft at 4200 RPM at the rear wheels. OEM rating on gasoline is 355 hp at 5600 RPM and 383 lb-ft at 4100 RPM. Power is right where it should be, especially when you take into account that this is with the 6L80 automatic transmission.
First, here is a chassis dynamometer graph of the truck as we received it. This is tested on our Dynojet 248 chassis dynamometer. We have both a Dynojet 248 and a Mustang MD-1750. We just happened to run it on the Dynojet because the Mustang had another vehicle on it. We get fairly similar results between the two dynamometers.
The abrupt end of the data is due to the factory speed governor.
This is on gasoline (roughly 9% alcohol content according to the on-board alcohol sensor).
307 hp at 5200 RPM and 332 lb-ft at 4200 RPM at the rear wheels. OEM rating on gasoline is 355 hp at 5600 RPM and 383 lb-ft at 4100 RPM. Power is right where it should be, especially when you take into account that this is with the 6L80 automatic transmission.
06-18-2013, 05:12 PM
#2
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Acceleration testing results, gasoline Here are some of the acceleration performance testing results when tested on gasoline.
Best on gasoline is 7.5 seconds 0-60 mph and 15.94 seconds and 90.75 mph in the quarter mile. 1/4 data is with NHRA roll-out.
Gasoline testing was with 1/4 tank of fuel. The truck weighs 5340 lbs with 1/8 tank of fuel and no driver. This is with the vehicle fully up to temperature as you would drive it on the street.
Best on gasoline is 7.5 seconds 0-60 mph and 15.94 seconds and 90.75 mph in the quarter mile. 1/4 data is with NHRA roll-out.
Gasoline testing was with 1/4 tank of fuel. The truck weighs 5340 lbs with 1/8 tank of fuel and no driver. This is with the vehicle fully up to temperature as you would drive it on the street.
06-18-2013, 05:14 PM
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E85 vs gasoline testing chassis dynamometer results The 2014 L83 engine is rated at 380 hp on E85 (vs 355 hp on gasoline) and 416 lb-ft on E85 (vs 383 lb-ft on gasoline).
We ran the truck down to about an 1/8 of a tank and then filled it up with E85. Pump E85 never tests at 85% alcohol since they have to dilute the alcohol itself with gasoline for transportation in order to make it no longer consumable by humans. Then we still had some fuel in the tank as well. So before switching to E85 the on-board alcohol sensor read 9% alcohol content and after switching it read 65% alcohol content.
Attached is a graph comparing gasoline vs E85. The speed governor has been removed in order to allow us to test to a higher speed on the chassis dynamometer.
On gasoline the peak power is 302 hp and 332 lb-ft and on E85 that increased to 321 hp and 355 lb-ft.
We ran the truck down to about an 1/8 of a tank and then filled it up with E85. Pump E85 never tests at 85% alcohol since they have to dilute the alcohol itself with gasoline for transportation in order to make it no longer consumable by humans. Then we still had some fuel in the tank as well. So before switching to E85 the on-board alcohol sensor read 9% alcohol content and after switching it read 65% alcohol content.
Attached is a graph comparing gasoline vs E85. The speed governor has been removed in order to allow us to test to a higher speed on the chassis dynamometer.
On gasoline the peak power is 302 hp and 332 lb-ft and on E85 that increased to 321 hp and 355 lb-ft.
06-18-2013, 05:16 PM
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E85 vs gasoline acceleration testing Given the fairly significant increase in power for the L83 on E85, we thought it would be worthwhile to go back and retest the acceleration performance on E85 fuel.
As expected from the chassis dynamometer data, the performance did improve.
Impressive performance numbers for a stock 5300+ lbs truck (200+ driver and a full tank of fuel so we were over 5600 lbs).
I did two runs on E85. They were virtually identical in performance so I didn't do any more runs since the data was so repeatable.
0-60 mph was a best of 6.96 seconds (6.97 on the run displayed in the attached graph). This was an improvement of 0.5 seconds over the best gasoline run.
1/4 elapsed time dropped to 15.51 seconds at 93.5 mph, for an improvement of 0.4 seconds and 2.7 mph.
As expected from the chassis dynamometer data, the performance did improve.
Impressive performance numbers for a stock 5300+ lbs truck (200+ driver and a full tank of fuel so we were over 5600 lbs).
I did two runs on E85. They were virtually identical in performance so I didn't do any more runs since the data was so repeatable.
0-60 mph was a best of 6.96 seconds (6.97 on the run displayed in the attached graph). This was an improvement of 0.5 seconds over the best gasoline run.
1/4 elapsed time dropped to 15.51 seconds at 93.5 mph, for an improvement of 0.4 seconds and 2.7 mph.
), but how did you disable the speed limiter?
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06-19-2013, 08:14 AM
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06-19-2013, 09:14 AM
#10
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Speed limiter 427920726570726f6772616d6d696e67207468652045434d20 616e642072616973696e6720746865207370656564206c696d 697465722e
06-19-2013, 06:31 PM
#18
Although the numbers and dyno graphs look good, i'm not real impressed with the seat of the pants feel after riding in both a 3.08 and 3.42 equppied truck, both 5.3's...but maybe im just spoiled to the tune/headers ive always had on my trucks.
