Lb7 Stock appearing turbo
- Thread starter Diesel Technology Source
- Start date
Got the turbo on today, 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.
DTS Turbo picked up 30hp and 35ft-lbs of torque at peak. But notice how much broader and flatter the curves are, truck holds power and torque much longer through the RPM'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.
DTS Turbo picked up 30hp and 35ft-lbs of torque at peak. But notice how much broader and flatter the curves are, truck holds power and torque much longer through the RPM'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.
you do this at cams shop? wish id know id come up and helped or just watched
Just 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...
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...
Pretty interesting I got a spare IHI laying aroung might just have to send it davids way or heck just ride up there and learn from him yet again lol! I totally agree David does top notch work and is a great person to hangout with and learn from.
I got my turbo yesterday and wanted to say thanks for the awesome service and fast shipping. hopefully get it on this weekend after this snow and wind stops.:woott: everything looks great thanks david