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I recently finished accumulating 2,000 miles on my new 360. I changed the oil to 10W30 Mobil-1 and decided to take it to Automotive Diagnostic Specialties in Chandler, AZ to have it dyno tuned. I figured I would post back the final carb settings to give everyone a good idea what is needed to get a Truck Avenger tuned properly.
The motor specs are as follows;
AMC 360
.030 Hypereutectic 9.0-1 pistons with coated skirts
Elgin RV spec cam
studded heads with 1.6 Comp Cams chromoly rollers
Edelbrock Performer w/EGR
Holley Truck Avenger 670cfm
double roller chain
Milodon 8.5 qt. pan
new timing cover w/midplate
An O2 sensor bung was welded in the y-pipe and the truck spent approximately 5 hours on the dyno. Stock jetting from Holley is a 68 primary, 89 secondary, 28 acc pump discharge. The shops dyno is a Mustang brand dyno that can simulate grades and even loads such as towing a trailer.
Final settings;
primary jet 67
secondary jet 72
acc pump discharge nossel 35
power valve 10.5
Cruising air-fuel ratio is 14.5
Wide-open throttle air-fuel ratio is 12.2-12.5 (It pegged the rich meter with the 89, 86, and even the 80 secondary jet settings.) The shop installed the 10.5 power valve finding that the slightly earlier enrichment helped towing a simulated trailer by not opening the secondaries until gowing up a grade. The power is great. I still need to mess around with the acc pump cam by swapping them to rid myself of an ever so slight off idle bog. The shop said it needs a little quicker shot, not necessisarily a larger shot. Other than that, it has awesome 1/4 throttle to 1/2 throttle response and torque. Wide open throttle is a whole new engine. It just keeps pulling up to 73 mph in second and hits 3rd pretty hard. 5,000 rpms even on the dyno took it to 118 mph.
Final numbers are 139.8 hp and 256.8 ft/lbs at the rear wheels. Working backwards figuring around a 35% drivetrain loss (TH-400s take about 30-40 horse just to spin) and the motor is a solid 215 hp and 395 ft/lbs. Interstingly, the truck kept down shifting into second so the dyno pull could not start until 2,700 rpms. I am almost positive my torque peak is lower than that so it may be making more torque that this.
Next weekend we are going to Gordon's Well at the Imperial Sand Dunes for a weekend of dunes runnin'. I am towing a 25-foot enclosed Pioneer camping trailer. Can't wait to see how this thing tows now.
Kevin.
The motor specs are as follows;
AMC 360
.030 Hypereutectic 9.0-1 pistons with coated skirts
Elgin RV spec cam
studded heads with 1.6 Comp Cams chromoly rollers
Edelbrock Performer w/EGR
Holley Truck Avenger 670cfm
double roller chain
Milodon 8.5 qt. pan
new timing cover w/midplate
An O2 sensor bung was welded in the y-pipe and the truck spent approximately 5 hours on the dyno. Stock jetting from Holley is a 68 primary, 89 secondary, 28 acc pump discharge. The shops dyno is a Mustang brand dyno that can simulate grades and even loads such as towing a trailer.
Final settings;
primary jet 67
secondary jet 72
acc pump discharge nossel 35
power valve 10.5
Cruising air-fuel ratio is 14.5
Wide-open throttle air-fuel ratio is 12.2-12.5 (It pegged the rich meter with the 89, 86, and even the 80 secondary jet settings.) The shop installed the 10.5 power valve finding that the slightly earlier enrichment helped towing a simulated trailer by not opening the secondaries until gowing up a grade. The power is great. I still need to mess around with the acc pump cam by swapping them to rid myself of an ever so slight off idle bog. The shop said it needs a little quicker shot, not necessisarily a larger shot. Other than that, it has awesome 1/4 throttle to 1/2 throttle response and torque. Wide open throttle is a whole new engine. It just keeps pulling up to 73 mph in second and hits 3rd pretty hard. 5,000 rpms even on the dyno took it to 118 mph.
Final numbers are 139.8 hp and 256.8 ft/lbs at the rear wheels. Working backwards figuring around a 35% drivetrain loss (TH-400s take about 30-40 horse just to spin) and the motor is a solid 215 hp and 395 ft/lbs. Interstingly, the truck kept down shifting into second so the dyno pull could not start until 2,700 rpms. I am almost positive my torque peak is lower than that so it may be making more torque that this.
Next weekend we are going to Gordon's Well at the Imperial Sand Dunes for a weekend of dunes runnin'. I am towing a 25-foot enclosed Pioneer camping trailer. Can't wait to see how this thing tows now.
Kevin.
Bling Bling Cha-Ching
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