Can't tune customer cars

[djpudz]

I got a story job that asked me to tune a car and increase power 10-15% (pic below)
https://steamcommunity.com/sharedfiles/filedetails/?id=2574153237
so I bought the dyno upgrade and tried to use the new tuning options and a message popped up saying I can only tune owned cars (pic below)
https://steamcommunity.com/sharedfiles/filedetails/?id=2574153316
I had to randomly buy upgraded parts until it added enough power instead. I had already fixed everything with standard parts too because I thought I would be able to tune them. I now have another job (random generated) that is asking the same thing.
It seems weird that we can only use it on our own cars when there are customer jobs that ask for tuning.

[Dixon Dourado]

i have the same problem....

[Tigre de Poche]

You can pass this job by using parts from the tuning shop. Do the math so those parts add between 10&15 tuning points. Has nothing to do with the car's power.

[djpudz]

Originally posted by Tigre de Poche:

You can pass this job by using parts from the tuning shop. Do the math so those parts add between 10&15 tuning points. Has nothing to do with the car's power.

I you read my post properly you will see I said that I had to use tuning parts to complete it. I presume by tuning points you mean the percentage increase stated in the corner of the parts icon in which case it doesn't work that way. I added parts that added up to around 10% increase then tested it on the dyno expecting it to increase power by 10%, it shown a 4.8% increase in power. I then added another 9% worth of parts and it shown a 12.4% power increase.
It has everything to do with the cars power as well, the tuning percentage increase it asks for is the percentage the horsepower has increased. If they ask for a tuning increase of 10-15% then the car will have a 10-15% HP increase when finished e.g a 100hp car would have 110-115hp when finished.

[Mayo]

When you run the dyno, look at the bottom after it has run. Tuning should read between 10-15%. I went WAY over the first time at 48%, and had to keep removing tuning parts till I got a green check for 15%.

Just keep removing tuning parts for regular parts, and keep running the dyno till you complete the objective.

[FlyingAllNight]

Yep 10-15 not 16 not 20 not 40. That is the problem.

[djpudz]

Originally posted by AndreWD40:

When you run the dyno, look at the bottom after it has run. Tuning should read between 10-15%. I went WAY over the first time at 48%, and had to keep removing tuning parts till I got a green check for 15%.

Just keep removing tuning parts for regular parts, and keep running the dyno till you complete the objective.

Yet another person who doesn't even read the full post

[ムーンアトラス]

Yeah, super odd. I never used the tuning on those I just used upgraded parts to do this so I never ran into this problem.

[Fate]

Also, the tuning laptop is only to adjust the gearbox. That doesn't change the acutal power of the car.

[Nalyu]

Using performance parts is the only way to increase the power of customer cars. So you did do it the right way.

[Lost in Gaming]

Originally posted by Nalyu:

Using performance parts is the only way to increase the power of customer cars. So you did do it the right way.

That's true, however with the ECU tuning it would be so much more "realistic". As in most tunes in real life the cheap solution is to modify the ECU a little to give a little more power. And since we are usually not required to increase the power by 30-50%, which would actually require switching to tune parts instead of the factory ones, I don't see the point of not having the possibility to use ECU tunes on customer cars. Makes no sense, in real life there's the possibility, and they use it. Way more often than parts switching. So I don't get the decision behind this from the devs.

If anyone knows a MOD that can go around this nonsense setting please let us know! I personall really need it because purchasing parts for 5-15% power increase is bull***t imo.

[xZero]

Originally posted by Lost in Gaming:

Originally posted by Nalyu:

Using performance parts is the only way to increase the power of customer cars. So you did do it the right way.

That's true, however with the ECU tuning it would be so much more "realistic". As in most tunes in real life the cheap solution is to modify the ECU a little to give a little more power. And since we are usually not required to increase the power by 30-50%, which would actually require switching to tune parts instead of the factory ones, I don't see the point of not having the possibility to use ECU tunes on customer cars. Makes no sense, in real life there's the possibility, and they use it. Way more often than parts switching. So I don't get the decision behind this from the devs.

If anyone knows a MOD that can go around this nonsense setting please let us know! I personall really need it because purchasing parts for 5-15% power increase is bull***t imo.

So, as a heavy duty mechanic I'll explain this a bit. The "cheap" solution by modifying parameters set in the ECM is possible, however, it is not recommended on stock vehicles. The problem with adding power to stock parts is you're increasing the stress on those parts, which leads to premature wear and possible failure. For example: If you increase your fuel delivery for more power, you run the risk of burning through the piston crowns, getting pre-ignition (on direct injection diesels), etc.

So, as a simulator the devs likely made the decision to better reflect what you would do professionally. That being said, I live in an area that has some of the best trade schools in the world, so service standards are high. Does it get done, absolutely. But replacing stock parts for performance parts BEFORE you do an ECM tune is the proper way to do it.

[astrofelix59]

Originally posted by Lost in Gaming:

Originally posted by Nalyu:

Using performance parts is the only way to increase the power of customer cars. So you did do it the right way.

That's true, however with the ECU tuning it would be so much more "realistic". As in most tunes in real life the cheap solution is to modify the ECU a little to give a little more power. And since we are usually not required to increase the power by 30-50%, which would actually require switching to tune parts instead of the factory ones, I don't see the point of not having the possibility to use ECU tunes on customer cars. Makes no sense, in real life there's the possibility, and they use it. Way more often than parts switching. So I don't get the decision behind this from the devs.

If anyone knows a MOD that can go around this nonsense setting please let us know! I personall really need it because purchasing parts for 5-15% power increase is bull***t imo.

FYI the tuning portion of the job is costed to the cheapest parts to make the minimum % required, with about 100 credit margin, you don't get paid by the value of the part as with normal part replacement.
Average performance parts are around 170-180 credits per 1% gain, exhaust, power steering, alternators, etc, with air filters being the best value.
Superchargers, gearboxes and ECU's are very expensive per 1% gain and generally cost more than the job pays.
Other portions of the job (panels, repairs) may cover some losses on the tuning.
You can use scrap upgrades to increase gain and get away with using one part less, though depending how you get your blues you may not be saving money. Also it doesn't need to be "balanced", if one piston, sparkplug, whatever out of eight gets you over the minimum % then it works.
Game rules.

[Mardoin69]

I like @xZero's analogy. Reminds me of my days in shop class in high school. We had a guy who did his project on swapping out a 6 cylinder motor with a small block V8 with HP parts. So, it was cranking out close to 300 hp in a car designed for a max of 190 (if even that) HP. They didn't change the rest of the powertrain components. Needless to say, they were out in the parking lot doing donuts and left the rear end behind scattered about the parking lot in molten metal fragments. Yeah... too much power applied to parts not designed for it is NOT a good thing. lol