Andrew1706 wrote:People quite often mistake torque they see on a dyno sheet as engine torque, it's quite easy to set up your gear ratios so your wheel torque is astronomical
My ex-bosses drag car forced his dyno guy to upgrade to a dynapak rated at 3000nm.
Since KiwiBacon likes numbers, what boost would a 2.8L petrol have to make in order to make over 1000 flywheel nm?
Funny how few people understand what gearing does. It's also amazing how few dynos are calibrated properly. Which leads to people thinking they've tripled the engines torque by doing sfa.
How much boost depends on what torque your 2.8 is already putting out and how good your fuel and intercooling is.
If you could get 280Nm from your 2.8, then you need to increase the air density by 1000/280 = 3.57 times.
To get 3.57 times the air density with a 60% efficient turbo and 60% effective intercooler you need about 58psi boost. But at that your intake temps will be about 130C, I don't know what fuels won't pre-ignite with those temps.
So you chase your tail around in circles with engine mods to handle the torque and reduce the compression ratio until you've got it working. Those probably reduced the engines efficiency enough that you now need more boost or a way better intercooler. The better your intercooler is the less boost you need (within reason).
70% effective intercooler would only need 52psi and your intake temps would be down around 100C.