Got the turbo on last week, much easier job when you have the right tools to get the downpipe and up-pipe bolts out. Dynoed the truck with the stock turbo, swapped the turbo, and dynoed it again. Only other difference was the ambient air temp, as it was 48-degrees when we tested it in the morning at 9:00 and 75-degrees when were re-tested at 2:30. This is a modified IHI turbocharger they are building, uses a 64mm extended tip compressor wheel with the stock turbine side.
Turbo was $1500 + core and worth every penny. Thing is so strong on the street now, especially for stock fueling. I charted it out and figured the numbers based off Engine RPM. This shows the real improvement...
2500 +20hp / 30lb-ft
2600 +10hp / 34lb-ft
2700 +20hp / 40lb-ft
2800 +30hp / 30lb-ft
2900 +28hp / 50lb-ft
3000 +40hp / 80lb-ft
3100 +45hp / 85lb-ft
3200 +55hp / 80lb-ft
3300 +60hp / 95lb-ft
3400 +70hp / 135lb-ft
So while at peak power, it only shows 30hp and 40lb-ft improvements. The gains just get larger the further into the RPM range you go, to a max gain of 70 rear wheel horsepower and 135lb-ft of torque at 3400rpms. That's a HUGE jump with no change in tuning. For towing, racing or sled pulling application this thing is well worth the investment. Not to mention the drop in EGT's...
Driving it, you'd never know it wasn't the stock turbo as far as spool-up and driveability go. Pulls much harder and EGT's are down over 100-degrees at wide open throttle. Judging by the exhaust, my tune is out of fuel, think we could feed it some more in the tuning, but in the interest of keeping the stock motor happy, I'll probably leave it where it's at.
Turbo was $1500 + core and worth every penny. Thing is so strong on the street now, especially for stock fueling. I charted it out and figured the numbers based off Engine RPM. This shows the real improvement...
2500 +20hp / 30lb-ft
2600 +10hp / 34lb-ft
2700 +20hp / 40lb-ft
2800 +30hp / 30lb-ft
2900 +28hp / 50lb-ft
3000 +40hp / 80lb-ft
3100 +45hp / 85lb-ft
3200 +55hp / 80lb-ft
3300 +60hp / 95lb-ft
3400 +70hp / 135lb-ft
So while at peak power, it only shows 30hp and 40lb-ft improvements. The gains just get larger the further into the RPM range you go, to a max gain of 70 rear wheel horsepower and 135lb-ft of torque at 3400rpms. That's a HUGE jump with no change in tuning. For towing, racing or sled pulling application this thing is well worth the investment. Not to mention the drop in EGT's...
Driving it, you'd never know it wasn't the stock turbo as far as spool-up and driveability go. Pulls much harder and EGT's are down over 100-degrees at wide open throttle. Judging by the exhaust, my tune is out of fuel, think we could feed it some more in the tuning, but in the interest of keeping the stock motor happy, I'll probably leave it where it's at.
