Engine rebuild questions

[Jahodac]

I have a couple engine rebuilding questions.

1. Does rebuilding the engine restore lost HP?

2. Does an engine rebuild cost more the longer you wait?

3. Does the cost raise exponentially?

4. How do you know when to rebuild the engine? Especially on high performance cars such as super/rm/super gt/race cars/lm race cars/c class/formula 1?

5. Should you always rebuild the engine when buying a used car?

6. Does rebuilding the engine reset miles?

7. Will you car still go bad from mileage even if you rebuild the engine such as a FGT with 100k miles that the engine was rebuilt every 1k miles?

Unrelated questions: What is the point of lm race cars? Why are people interested in them? It seems like C class cars beat them at nearly everything.

Detailed answers are appreciated but due to the amount of questions I would appreciate short yes/no answers as well.

 

[j1nd3r]

rebuilding the engine does restore bhp, my f1 needs it soon but i think it engine blows or something before you need to still waiting for find out.

 

[Villain]

1. Yes
2. No
3. No
4. When the Oil Change is no longer enough to restore HP back to where it should be.
5. It's a good idea.
6. No.
7. Not sure what you mean.

 

[Highlandor]

7) Yes it doesn't matter what age. mileage, how many oil changes or engine rebuilds have been done previously - after a certain amount of miles your engine will start to loose power (slowly) and another engine rebuild is due, I think this mileage figure stays constant.

So if it takes 1000 miles of use (when your car has 10,000 miles on it) then it will still be 1000 miles of use (when your car has 150,000 miles on it).

But that's an educated guess from experence rather than a fact.

 

[Funkdoc]

I have a similar problem... 787B stealth stage 2, after many miles... after many oil changes and engine rebuilds... my max hp is now 898hp... before it was 900hp. I basically rebuilt the engine and oil changed after every race... Is there any way of gettin back the lost hp?

I dont know the milage on the 787B... i'm guessing quite a lot... 90% of driving in spec B upto Lvl 35.... X1 takes over the grinding duties now...

and answering the first post's unrelated question. Group C racing ended in the early 90s... LeMans cars are basically the replacement. But even LM cars went through many changes and have many different catagories... Its hard to compare them as they never really raced together and raced under different rules. late 90's GT1 (based on production car ie nissan r390, toyota GT1, CLK GTR) was the top catagory...the current top catagory is LMP900 (prototype cars ie audi R8 and R10)

One of the main reasons group C got canned was because they got too dangerous & expensive... they were qualifying with well over 1000hp... an interesting article i read in a porsche magazine... porsche 935 from the 80's were about 1500hp, run the 1/4mile in 7.x sec and use tyres so soft it only last 1 lap... in qualifying trim... Group C cars engines are as powerful as F1 of the day (often the engines are closely related)... Back to the LM era... cars were much less powerful... but also much more efficient (aero, drivetrain losses, faster gear change)... so in endurance races... cars these days can still easily compete. Its all about rule changes... Technology is making us faster and faster so the rules have to be more and more strict to slow us down... If we used group C rules today... the cars would beat a F1 car i'd say....

 

[Mopatop]

Funkdoc the output of an engine raises as you first start using it then drops slightly due to the running-in effect. Those horses have gone forever sorry.