Leaderboard

I had a similar thought as you and had asked Matt@Cosworth and his feedback was as under. the low temp thermostat in the car, this is worth about 3-4 bhp on its own plus you can then get another 1.5° of spark in there as the heads are colder which results in another 3 bhp Am sure Cosworth did their R&D thoroughly on it and have spent hours on testing the engine on an engine dyno which no one else has done. That is why came up with a LT Thermostat in their package. If it were just a transient gain, they wouldn't recommend it.