I should be firing up my motor by this coming weekend. I was instructed not to boost the motor for at least 1000 miles.

Today while I was re-assembling the turbos I was wondering if I should just disconnect the actuator rods and use a wire tie to make the waste gate flappers stay open.

Think this would be a good idea until the motor is ready for boost again?

 

Just be careful with your right foot, avoid wide throttle openings.

Whoever told you not to boost at all for 1000 miles is being *way* too conservative. Even if you have all fresh internals to include new bearings, there is no reason not to give the motor a little bit of boost (ie less than 1/2 bar) after the first 500 miles.

We warrant our builds, to include streetports, for 1 year/12k miles, and our breakin schedule is as follows:

first 500 miles, revs less than 4k, minimal boost
change oil/filter
next 1000 miles, revs less than 6k, boost less than 1/2 bar
change oil/filter

And I consider this breakin schedule quite conservative.....the important thing is to keep the revs down.

 

ah understood. yes i have all new bearings, new 3mm mazda seals, new e-shaft...

that's the break-in schedule i was pretty much going to follow...

i was just wondering if keeping the wastegates open for the break in period would be a good idea in addition to what you listed.

 

One thing I thought about while considering break-in is this: when my engine was new from mazda it wasn't limited at all. This is the same engine that went 130k miles.

There are a million different break in regimens out there. Basically all of them indicate a gradual increase of RPM and boost.

I'm breaking in mine right now. Personally, I kept the RPM's low the first couple hundred miles. Then, under 4k to 500 miles. Now I'm going to keep it limited to ~5k until 1200 miles.

Not to say I've been thrashing the new engine, but boost I didn't worry about too much. Light on the throttle the first couple hundred. Now it's been to 10 psi many times.

The engine has been making stellar compression since day 1. New main bearings, cermet rotor housings all new soft and hard seals + springs.

What did you get a new e-shaft for? You can get the exact same one from an FC for pocket change.

 

got a used one for $25. perfect condition no sign of wear.

 

oh...

Well, anyways... if you really don't want to boost much, then I would temporarily replace the wastegate line with a line that doesn't have a restrictor pill in it.

I didn't want to boost much either, but I couldn't help myself. hehe. Like goodfella said, though... RPM is the biggie.

 

I usually just suggest removing the boost pills or keeping the EBC off. That will in the least limit boost to the wastegate spring levels. I agree with Rich on there being no real issues with a little bit of boost during the break-in.

 

The 1997 Mazda Competition Catalog states on page TT-23

Old Bearings: 100 miles
New Bearings: 300 miles