- Messages
- 5,413
It's not the BHP that will kill a motor, it's the torque. Mine was torque limited to just over 300ftlb. Ben at TDi North was running over 500bhp in his k-swapped EG.
There are a couple of reasons I recommend turbo over SC, but the main reason is power delivery. A supercharger delivers power via a pulley from the motor and is essentially regulated by engine speed, so basically the more revs = more power, but you are only reaching peak power output at the moment you change gear, so really the delivery of the power feels very similar to an N/A motor, only it's delivered a bit quicker. This is what made me swap to a turbo, as the car had to be thrashed to get the most out of it. With the turbo, it's not regulated by the motor, and it's delivered in one big lump, so you are getting more power earlier in the rev range, and it kicks you back into your seat. Have a read through my build thread, and there's some tuning graphs from TDi, with the supercharger you get a nice diagonal line, with the turbo it's almost vertical.
Another reason I would recommend the turbo is the adaptability. A supercharger is fit and forget, it can't be adapted, unless you want to change pulleys and belts. Whereas with a turbo, you can run boost by gear to minimise wheel spin, you can run low and high boost by flicking a switch on the dashboard, so you can run the car conservatively around town in low boost, and when you reach countryside roads you can flick a switch to high boost for ***** and giggles.
The turbo kit that I had made was good for 800bhp as it was intended on being a dedicated drag racer, but I never got the engine completed.
I did around 12,000 miles as a daily, before I took it off the road, but the motor and box were running fine when I did.
There are a couple of reasons I recommend turbo over SC, but the main reason is power delivery. A supercharger delivers power via a pulley from the motor and is essentially regulated by engine speed, so basically the more revs = more power, but you are only reaching peak power output at the moment you change gear, so really the delivery of the power feels very similar to an N/A motor, only it's delivered a bit quicker. This is what made me swap to a turbo, as the car had to be thrashed to get the most out of it. With the turbo, it's not regulated by the motor, and it's delivered in one big lump, so you are getting more power earlier in the rev range, and it kicks you back into your seat. Have a read through my build thread, and there's some tuning graphs from TDi, with the supercharger you get a nice diagonal line, with the turbo it's almost vertical.
Another reason I would recommend the turbo is the adaptability. A supercharger is fit and forget, it can't be adapted, unless you want to change pulleys and belts. Whereas with a turbo, you can run boost by gear to minimise wheel spin, you can run low and high boost by flicking a switch on the dashboard, so you can run the car conservatively around town in low boost, and when you reach countryside roads you can flick a switch to high boost for ***** and giggles.
The turbo kit that I had made was good for 800bhp as it was intended on being a dedicated drag racer, but I never got the engine completed.
I did around 12,000 miles as a daily, before I took it off the road, but the motor and box were running fine when I did.