It makes 1290 HP, although the real RM 8SM variant Merlin engine made 1390 at 23000 feet, so I made a mistake that I only noticed now, but I think its pretty decent, I was aiming for the highaltitude performance anyways. I think I set the drivetrain parameters wrong despite giving it the 0.42to1 gear overdrive that the Spitfire Mk9 had, as the "airspeed" reads 663 mph, while in reality the propeller is barely moving the air faster than the aircraft at top speed, that's why it doesn't keep accelerating, so the more proper speed reading there would've been closer to 430 to 450 mph or so, to work with the Spitfire's top level flight speed of about 403 mph.

Also, for the exhaust, I roughly measured and tried to mimic the exhaust layout of Jay Leno's Rolls Royce Merlin car, with those funky giant exhaust headers that drop to large straight pipes that dump out the side in front of the rear wheels. This gave it a nice throaty sound, and it was a decision I made after several attempts to get the program to work with 12 exhausts, one for each cylinder, but even at just 6 the sound system became overloaded from having to simulate 6 or more individual sound particle systems at the same time. I mean, it kinda makes sense, what car do you know of that has more than 4, or heck even just 2, separate exhaust systems? The Zonda is about the only one I know of that has 4, and that's the most of all cars I can think of. Heck, I might try the Zonda motor sometime.

Get it here:
https://catalog.enginesim.parts/part...

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