Would Like to know how to build the 4A-GE Engine (Stock)

[Ephysona]

I'm not saying "I want to build Bunta's Engine," I'm saying I want the stock engine, the one that comes in the Trueno with no tune ups. I've gotten pretty darn close, matched up most of what I could find, but... I can't get the power and torque to line up... These are the specs:

Specifications:

Engine displacement: 1.6 L (1,587 cc)
Layout: DOHC Inline-4 (Straight-4)
Bore and Stroke: 81 mm × 77 mm
Dry Weight (with T50 gearbox): 154 kg (340 lb)
Valves: 16, 4 per each cylinder
Power: 115–128 hp (86–95 kW) at 6,600 rpm
Torque: 148 N⋅m (109 lb⋅ft) at 5,800 rpm
Redline: 7,600 rpm
Fuel Delivery System: MPFI

Torque should be 148 Nm at 5.8k RPM. I can't get it at exactly 5.8k.

Power should be 85-95 kW at 6.6k RPM. But no matter what I do, it always wants to peak out at redline. I can't ♥♥♥♥♥♥♥ figure it out... Could someone help me out? Give me some values? I want to learn this stuff so bad, but I'm incredibly stupid when it comes to engines...

[ShoterXX]

Probably taking from the same place: "Toyota increased the compression ratio from 9.4:1 to 10.3:1." or "[...] a production engine using an all-iron block, weighing in at only 123 kg[...]"

It's naturally aspirated, has catalytic converter.

MPFI means Multi-Point Fuel Injection.

I'm guessing it runs on Regular. Scratch that, it runs on Premium apparently.

Also, make sure you're setting yourself in 1986.

Check websites like Automobile-Catalog or Carfolio, they also usually contain detailed data on cars, even power charts sometimes.

[Ephysona]

Hmm...

Well, I'm did realise after this that I could set the date, and that affects a lot of parameters. But I'm still so lost...

[MacKaNmeisteR]

Originally posted by ShoterXX:

Probably taking from the same place: "Toyota increased the compression ratio from 9.4:1 to 10.3:1." or "[...] a production engine using an all-iron block, weighing in at only 123 kg[...]"

It's naturally aspirated, has catalytic converter.

MPFI means Multi-Point Fuel Injection.

I'm guessing it runs on Regular. Scratch that, it runs on Premium apparently.

Also, make sure you're setting yourself in 1986.

Check websites like Automobile-Catalog or Carfolio, they also usually contain detailed data on cars, even power charts sometimes.

Good thing that you've addressed the fuel type!

US "Eight uh six uh's" was modified to comply with Californias emissions regulations. I guess the easiest fix was to reduce the compression ratio and we know from Automation that lowering the compression ratio reduces emission intensity and allows to run with a ♥♥♥♥♥♥♥♥ quality fuel.
US spec: 4A-GEC
112 Bhp (84 Kw)
96 Lb.ft (136 Nm)

Europe and Japan luckly didn't get this modification so we got the "full version" so to say.
Rest of the world spec xD: 4A-GE
128 Bhp (96 Kw)
110 Lb.ft (149 Nm)

Hope I gave you some help on making this engine :3

[ShoterXX]

Well, this is the closest I've gotten to the real thing:

https://steamcommunity.com/sharedfiles/filedetails/?id=1421157517

https://steamcommunity.com/sharedfiles/filedetails/?id=1421157685

https://steamcommunity.com/sharedfiles/filedetails/?id=1421157817

https://steamcommunity.com/sharedfiles/filedetails/?id=1421157996

https://steamcommunity.com/sharedfiles/filedetails/?id=1421158232

https://steamcommunity.com/sharedfiles/filedetails/?id=1421158420

A few things to note:

- Fuel consumption is pretty bad, unlike the real counterpart;
- Pretty sure the exhaust is innacurate, but fixing it would greatly reduce power;
- Also pretty sure the timings are incorrect, but can't really tell;
- There wasn't much info I could find about stock internals, but I'm assuming they would've been forged anyway, since thats all I can find as replacement parts, and its also closest to real engine weight;
- I used Per Cylinder, since it's the closest you can get to the T-VIS.

[Ephysona]

I was using single, not per cylinder, and I got pretty darn close. when I used per cylinder, I would hit my torque peak much too high.

[ShoterXX]

It doesn't change the stats all that much really, though it does give a bit better torque on the low-end, like with T-VIS.