versep

Hey guys, I came across this: http://www.mototuneusa.com/break_in_secrets.htm

I know the page is directed to piston engines, more specifically motorcycles. But I was wondering if anyone has dared to try this method of break in with positive results?

I remember seeing impressive numbers out of a stock FD with seq twins using this method of break in before but I can't find it anywhere.

I will most likely be rebuilding soon and wanted to look for other people's experience before actually attempting this.

Thanks!

Oscypek1007

iTrader: (1)

ive read that article before... it makes sense to me that is why when i had to put a new motor in my s2000 I didn't break it in slowly, I just drove it however I wanted to. I just got my motor in my rx7 and to be honest I am to scared to try that. One problem is I would have to get the car tuned first.

arghx

iTrader: (3)

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/why-break-engine-when-nobody-broke-original-engine-829787/

oo7arkman

iTrader: (2)

This has been debated on here (the topic of break in) ad-noseum...

I can tell you every brand new bike I ever bought I never broke in. Get it on the highway (or backroad) and just rip on it all the way home. NEVER had a problem with any of them...

My reservations with this approach on the FD... The addition of boost. I am just a bit green to boosted engines still and I don't like the thought of adding boost at moderate amounts to a freshly assembled engine. So I stick to what most engine builders recommend. Plus during the build the tune may be off now to safely rip on the motor.

EjCabrera

iTrader: (4)

once i got mine rebuilt i drove it straight on the freeway but under 3.5k and no boost as my builder recommended. The engine might feel a little bid weird at first because the apex seals have not set, but after you keep putting on miles the engine will run much smoother. I hear its if you get new bearings because they take longer to set and that you should put on a few more miles under 3.5k and no boost to make sure they're set in there. it could be anywhere from around 700miles to 1.5k miles for the engine to be considered broken in and driven however. but yeah if you go with the mash it approach just make sure its tuned.

Enervation

I've watched a number of 'megafactories' documentaries about car factories (Porsche, Lamborgini, Ferrari, Corvette). I noticed that most (if not all) of them did a full dyno run in the factory, some on an engine test bed, others in the car on a rolling road. It looked as though some of the test were power tests, where they verified the peak power.
I know a few pulls on a dyno isn't the end of the world, but it seems as though some modern engines have a hard life in the factory, not to mention out of it!

Now I realise I'm talking about piston engines, but do note that the Corvette was the supercharged one, so possibly it was boosted right from the get go.

On the other hand, they may have been simply running everything at half throttle, and just comparing readings & power with expected values. Still, food for thought.

EvanchiX

iTrader: (1)

I recently had my engine rebuild and my mechanic told he I would need to break it in, here is what he told me to do.

First 400 miles don’t rev past 3K RPM
Then get an oil change
Next 500 miles don’t rev past 4.5K RPM
Another oil change
After that you can rev as high as you want.

After the first oil change around 500 miles you will start to feel a slight difference when driving, the engine starts to feel smoother. I really didn’t think I would feel the difference but you do.

Anyway that was my experience and my 2 cents on this.

Enjoy!