NASCAR cars gaining more hp with every km driving? What is that?

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Because of the new seasonal event with NASCAR on the Nords, I thought it would be a good moment to complete the final Jeff Gordon school to win the NASCAR. So I golded it and got the Gordon NASCAR. Ok, but it had only around 614 hp. So I decided to do an oil change, but it was to much. Now it had 645 hp. Ok, so I decided to make the NASCAR championchip, which I hadn't touched, gain some $ and exp. and loose some hp.

But, after finishing the championchip in gold, the car has now even more hp! :crazy:

658 hp

Now what?
 
I think it happens to every car. I've noticed it happening to every car I've driven so far.
 
Also before driving any new car change the oil and you will notice a HP increase.
For example the X1 new comes with 1438HP, after an oil change its 1509HP. Drive for a few hundred miles and it goes to 1557HP.
 
Yep it takes roughly 200 miles to fully break in an engine in game.

A Nascar off the lot has about 824 HP. After an oil change has about 862. After 200 miles and oil change should be at 892 and shoudl stay there with regular oil changes up to a few thousand miles. I want to say 5,000 but I think it is a little less that the power first starts to drop. Somewhere between 4-5,000 miles I think it is.
 
Engine break in/running in is when the ring beds into the bore and the ring and piston build up a carbon seal. When an engine is fresh from being built it starts off tight, but once it is run in and the ring is fully bed in there is less mechanical drag and a decent carbon seal will improve compression, both of those giving more power.
 
Oh and eventually it will start to lose hp when the engine starts getting loose, which is when you will want to rebuild (overhaul) your engine to start the whole process over again.
 
There is a fault though regarding the Ford Fusion Nascar at least, it gives you free automatic oil changes everytime it needs one, meaning you can never get to 850bhp to enter the seasonal challenge. I had to spend 500k on a new nascar with 824bhp in order to do the race.
The power does go down to 850bhp after 9 hour endurance race, but by the time i exit and get around to doing the seasonal event with it, it goes back upto 862bhp without me doing anything.
Good for people wanting to use this car for their B-spec and A-spec endurance though.
But i don't like Nascars so it's just annoying for me.
 
Engine break in/running in is when the ring beds into the bore and the ring and piston build up a carbon seal. When an engine is fresh from being built it starts off tight, but once it is run in and the ring is fully bed in there is less mechanical drag and a decent carbon seal will improve compression, both of those giving more power.

👍 Good Explanation - Not many people have that concise of an understanding of engine mechanics! :sly:

Oh and eventually it will start to lose hp when the engine starts getting loose, which is when you will want to rebuild (overhaul) your engine to start the whole process over again.

👍 Good Explanation AGAIN! :)

Yep it takes roughly 200 miles to fully break in an engine in game.

A Nascar off the lot has about 824 HP. After an oil change has about 862. After 200 miles and oil change should be at 892 and shoudl stay there with regular oil changes up to a few thousand miles. I want to say 5,000 but I think it is a little less that the power first starts to drop. Somewhere between 4-5,000 miles I think it is.

I have found (after extensive testing) that the Grand Valley 300km (186mi) Endurance Event is enough to fully run-in an engine so if you wish to extract peak performance immediately send out Bob to do the running-in for you! :sly:
Also, with regular oil changes as mentioned above I have found that engine starts loosening up and dropping power just short of 5,000km (3,100mi) but after testing this I have also found that after 10,000km (6,200mi) the engine has lost ~5% of peak power (tuned or untuned makes no difference).
So my advice and my personal opinion is; After purchasing a car if you need peak output ASAP do the GV300 and then change the oil. This will give you optimum performance and then just complete regular oil changes until you reach 10,000km (6,200mi) then do an engine overhaul (rebuild) and start the process again! :)
 
@dunnett42

I understand your second post but I got kinda lost on the 1st post, which was the explanation, but I think I know what you are saying..
 
I'll try again. When an engine is freshly rebuilt, it starts off with the piston/ring tightly fit in the bore, which creates drag. Part of the running in process is the piston/ring bedding into the surface of the bore, which reduces drag. Another part of the running in process is a carbon seal around the ring which improves compression. Both of these things improve hp. Better? :)
 
I'm a tad lost on this one. My stock car has 2 hp more than the minimum allowed to do the seasonal event. I had won another stock car (which I gave to a friend in need) but I noticed that the one I sent him had WAY less HP than mine.

I understand that the game simulates break in and engine wear but... There's something missing here. These cars are supposed to be equal. If they are not going to be completely equal just because of the engine break in/wear simulation, than they need to loosen the requirement for entering that event. This is a little silly. It's a Nascar event, I have a Nascar car. I want in.
 
Yeah it is a bit ridiculous, but that's how it is. I'd say they probably got data from some NASCAR teams about this sort of thing though, the problem is the real NASCAR teams would do the running in before they race, so they are all equal anyway. I think they need to lift the limit on this event to 900 or something.
 
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