Break in Period

[Chad86]

Originally Posted by 86viper

FWIW, our 86/brz club here in AUS just had a dyno day with over 25 cars running. The ones making the most power were the ones driven the hardest. The babied ones made the least. Will the ones driven hard last as long? Time will tell, but they certainly made more power.

eg - 2 completely stock cars, dynoed just mins apart, 104rwkw to 112rwkw (our aussie dyno's read low) But 8rwkw difference is alot for zero mods

Just baby the car for the break-in period and then modify it later on. Then we'll see who's car is fastest...

[86viper]

Originally Posted by Chad86

Just baby the car for the break-in period and then modify it later on. Then we'll see who's car is fastest...

With equal mods though, the cars pushed harder early on made more power, pure and simple.

By a measurable amount too.

[Chad86]

Can anyone back up this claim or is is

[mike the snake]

Reading about break-in, there's many schools of thought.

What I took from it all was, for the first few miles, to ensure the best seating of the rings, you want to induce the highest pressures. This causes the rings to seat quickly.

This is important in the first 50 to 100 miles or something like that.

This doesn't mean you have to redline the car a bunch, just drive it so the highest pressures are produced.

In the article I read, that was something like mid-rpm's, high load, at full throttle. Like 3rd or 4th gear pulls from, say 2500 to 5000 rpm.

[86viper]

Originally Posted by Chad86

Can anyone back up this claim or is is

Our dyno day results showed some results. Enough to be conclusive? Well that depends on you.

Totally stock cars Varied from 102rwkw to 112rwkw. Thats a 10% variance in power with the only differences being amount of km run, and how hard the cars have been driven.

Throughout the day, ALL the cars driven the absolute hardest were at the higher end for their mods.

Is it a scientific test? No. But its some data to draw from.

[Chad86]

Originally Posted by 86viper

Our dyno day results showed some results. Enough to be conclusive? Well that depends on you.

Totally stock cars Varied from 102rwkw to 112rwkw. Thats a 10% variance in power with the only differences being amount of km run, and how hard the cars have been driven.

Throughout the day, ALL the cars driven the absolute hardest were at the higher end for their mods.

Is it a scientific test? No. But its some data to draw from.

We also might see how long until your engine has problems?
Has anyone else on here tried this?

[86viper]

Originally Posted by Chad86

We also might see how long until your engine has problems?
Has anyone else on here tried this?

True,but i never said your engine will last longer driven harder, only that it will make more power :P

How long these engines really last we won't know for a few years about their long term durability.