Compression problems

[Bullets]

In both images you have a 0.0 MTBF, that means that BOTH engines fail, not just the second one.

If you try to replicate the AUDI R8 4.2, the max rpm on the real engine is 8700.

I dont care about MTBF. Im just exploring the limits and technics. 0 MTBF or not, the engine runs and show results anyways.
I'm close to found the source of the problem. I think its related to the Exhaust diameter and cam profile.

[darkjedi]

I have discovered how the bug appears.

it seems it only affects turbo engines. you build and tweak everything and when saving the engine something breaks. the problem only surfaces after you modify something again, usualy AR ratio or boost or put the engine in one of your cars. if you reload the engine in sandbox mode, nothing happens.

LE: it also happens when you test it againg right after saving.

[Bullets]

Yeah i forgot that detail about this problem affect only turbo engines.
Today I made another test: I loaded a 4 cyl engine and after enlarge the exhaust diameter in 1" the "miracle enabled".
I tried to reproduce again but it doesnt work. I got fooled again

[Bullets]

Hey guys. I made the video.
http://youtu.be/diDoW5JEM2Y

[Killrob]

Thank you very much for the video! This showed what actually happens We'll get on fixing this for the next update.

[Bullets]

So glad to help you
You are doing a amazing job.
Thank you very much!

[23dutch45man]

I have a similair problem or the same problem in the Muscle Car Mania scenario from the V8 engines.

The engine has a RON of 90.9 and when I increase the ignition timing from 74 to 75 or the compression from 9.2 tot 9.3, I am losing like 80 kW, even if you compensate for engine knocking by making the fuel mixture thicker. Adding more fuel doesn't seem to make up for my lost power.

When I switch from flatplane to the normal v8 and back again, the issues is fixed, until I start fiddling again with the compression

Here are the specifications of the engine:

(gold medal spoiler alert!)















V8 Flatplate aluminium block
Bore 84.1
Stroke 105.5
Cast Iron crank
I beam steel
Forged pistons
Direct acting ohc 2valves
Compression 9.2
Cam profile 70
Natural aspired
4 Barrel twin carburettor
Performance intake
Ignition time 74
RPM 5500
Long tubular single exhaust 3.00 inches
No cat or any mufflers or a bypass valve.

Bottom tech 3
Top tech 3
Fuel Tech 8
Exhaust tech 3

Edit:
Fuel mixture is 13.7

[Bullets]

I'll try to reproduce it right now.

[Bullets]

how is the fuel mixture you are using?

[Bullets]

and these problems I report initially still occuring

[Killrob]

Bullets: we were able to reproduce the error with the engine file you gave us previously, but we've not been able to see what is causing it.
What we found out is that the problem is connected to the saving of the engine, there's not even any need to change any of the sliders.
Do you have an engine you could share that was completely built from scratch in this current version (open beta) that has that problem?

[23dutch45man]

I have managed to recreate the same bug with a new file for the scenario, the game has the latest patch installed, the specifications from the engine are the same. I simply moved the older file to another map.

When i started the game, the gold medal for the scenario was gone and I had to create an engine from scratch. After recreating the same engine and increasing the ignition timing without adding more and with adding fuel, I am still losing 80kW.

The power and torque curve of the engine with 250 kW and the one that can produce about 170 kW, are the almost same, until it hits about 3300 rpm. That's when the engine with 250 kW is still increasing in torque and the other engine loses torque and thus power.

V8Scenario11.lua

The file for the engine.

(36.91 KiB) Downloaded 197 times

[Bullets]

Rob the problem is not after save the engine. It occur while build it.
The difference after the update is that when I save the engine, close the designer and check the engine specs on engine management I you note that something is not righ.(the specs are totally wrong comparing to before I close the designer)
Here is the engine. I built a naturally aspirated yesteray and made a turbo version now.

[Killrob]

Thank you for the engine, it does as I expected:
1) revise engine (no changes!) -> run engine -> doesn't work
2) revise engine (no changes!) -> run engine -> save engine -> run engine -> does work

[Bullets]

sorcery!!!
lol
So, this is an apropriated compression or this still a glitch/bug?