PGTR Realistic Club
- Edison NJ
- Lucid killer 58
I want realistic power/torque outputs/curves from tuning an engine.
In past GT's, if tuning a normally aspirated engine (as an example) a 2litre 4 cylinder from 150BHP TO 350BHP, often the RPM where peak power is produced would hardly rise which is VERY unrealistic - as well as the peak torque figure being way too high for an NA 2000cc engine. I have never heard of a 2litre NA engine producing over 300ft/lb without the help of a Turbo or Supercharger!!
To achieve big power gains from an NA engine, you have to increase rpm's. 100bhp per litre peak BHP outputs are normally produced between appox 68000/7500rpm, 200bhp per litre is 13400rpm to 15000rpm, dending on config/spec/cylinders/bore/stroke etc of the motor.
I would exspect a 2litre NA engine with 350bhp to produce it's peak BHP higher than 6800rpm.
Also, it is almost impossible for an NA engine to produce 100 ft/lbs of torque per litre, no matter how hard or high it revs or how much peak power it has.
Although F1 cars are 700/800bhp there peak torque is certainly under 300ft/lb