How to get 0 psi for break in

[FLG]

i thought engine decel was bad for the first 1000 miles when breaking in a fresh build

No you want engine braking to seat the Rings

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[Nutzy]

http://www.mototuneusa.com/break_in_secrets.htm

[einstein57]

That's how I've been doing it for the last 20 years (race track method).

[jlevie]

Whether the engine has FI or not doesn't matter, To break in the engine, get it up to normal temperature, lock the throttle for 2500rpm, and hold that 20 minutes. At that point the engine is fully broken in. This comes from the motorcycle world and from a NASCAR engine builder. Motor cycles might be different, but the NASCAR guy's advice definitely applies.

I've done race engines and street engines like this for quite a while with complete sucess.

[bmwman91]

Any recommendations for oil to use? There is always a big controversy about dino vs synthetic.

[FLG]

Dino.

Joe Gibbs break in oil. Used in my mopar 440cid no cam issues

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[einstein57]

How many times a season do those NASCAR guys rebuild/replace their engines in 1 season? I have read about using the method you describe for top end rebuilds.

[ColdAsLife]

Whether the engine has FI or not doesn't matter, To break in the engine, get it up to normal temperature, lock the throttle for 2500rpm, and hold that 20 minutes. At that point the engine is fully broken in. This comes from the motorcycle world and from a NASCAR engine builder. Motor cycles might be different, but the NASCAR guy's advice definitely applies.

I've done race engines and street engines like this for quite a while with complete sucess.

+1

I had researched the hell out of this and asked a number of builders of multiple engine types. Nearly all followed this exact or very similar procedure.

[Dj Buttchug]

youre not suppose to run synthetics during break in periods.

[BMWManiac]

What I am kind of curious about, is there are a lot of theories behind how to properly break in an engine....my question is, how do you know that the engine is broken in properly? Would you expect to see a lot of blow-by? Oil consumption, gas mileage? How long the engine "lasts?"

I just had my engine rebuilt. My engine builder, a BMW mechanic, started the car, got the car to operating temperature, and then drove the car hard, got into boost, did some deceleration, and use Rotella T 5w40 oil (changed after 20 miles.) I will continue to use this oil and change it at 500 miles, 1200 miles, and then every 3000 miles.

I'll let you know in a couple years how the engine is holding up.

[digger]

compression test and leak down test?

[Nutzy]

Whether the engine has FI or not doesn't matter, To break in the engine, get it up to normal temperature, lock the throttle for 2500rpm, and hold that 20 minutes. At that point the engine is fully broken in. This comes from the motorcycle world and from a NASCAR engine builder. Motor cycles might be different, but the NASCAR guy's advice definitely applies.

I've done race engines and street engines like this for quite a while with complete sucess.

+2

Oil should be a dino type, no synthetics.

[GunMetalGrey]

Boost during break in still seems wrong to me lol