I know this has been done before but I want to have a crack at it. The aim is to design an engine that gives the best fuel efficiency for the given performance index while taking into account engine size and reliability, so you’re not focusing on one thing like the most power or just economy alone. The formula for working out scoring and you can enter it into Excel, LibreOffice or whatever you use goes a little something like this.
(Performance Index/Variant Capacity CC) * Fuel Efficiency * ((Fuel Efficiency * Reliability)^0,5+100)
So a few things about the engine design:
Layout: Inline, V or Boxer
Cylinders: 3, 4, 5 or 6
Head & Block Material: Any
Family Capacity: Must have a 3mm overbore from the variant capacity
Head & Valves: Any
Conrods: Cast to Lightweight Forged but not Titanium
Pistons: Any but you’ll probably want Low Friction
Variant Capacity: Any
Cam Profile: Any
Turbo: Is going to be a must to get the best score
Fuel System: Probably going to get the best from Direct Injection
Configuration: Single, twin or per cylinder
Intake: Standard only
Fuel Type: Premium 95 only
Fuel Mix: Any
Ignition Timing: Any
RPM Limit: Any
Exhaust: Single or Dual
Exhaust Valve: Any
Exhaust Diameter: Keep it realistic/reasonable
Cat: Three Way Only
1st Muffler: Baffled, Reverse or Straight through only
2nd Muffler: Reverse Only
Quality sliders: Max only of 5 points to be used where you like. You can choose to put all 5 on one slider or distribute 1 point over 5 quality sliders, whatever works best for a better final score.
Engines will be categorised by Variant Capacity, maybe later by engine layout.
If you want to be a part of this community challenge then submit your engine design by starting your post with the Family - Variant engine name as follows:
Family: Your username or company name, Variant Litre, [Family Litre], Engine Layout, Valve Layout
Variant: If VVL or VVT or if both VVLT, Fuel System, [formula score].
Then submit five screen shots of each of the five engine sections.
1.1 Litre Category
1st. ARAIYRA 1.1 [1.0] B4 DOHC 16V - VVLT DI [517.6]
2.1 Litre Category
1st. ZoomZoomer32 Toronado 2045 I4 DOHC-VVT/Di (316.84)
2.8 Litre Category
1st. Hshan 2.8 [3.0] I6 DOHC 24v - VVLT DI [555.2]
2nd. Zephorus 2.8 [3.0] I6 DOHC 24v - VVLT DI [548.3]
3rd. Gullray 2.8 [3.0] I6 DOHC 30v - VVT DI [381.3]
4th. Zephorus 2.8 [3.0] I6 DOHC 24v - VVLT DI [299.2]