Well, I am going to boost my 12a after the rebuild, but my question is should I wait to boost it until after break in? Or break it in on low boost? And while on the subject, whats the "best" break in procedure?

 

3000 km or 1500 miles, don't go past 3000 rpm. No boost until broken in, use a proper break in oil like Amsoil. Change the oil after break in. I would also use regular oil for a little bit anr change it at say 500 km or like 250-300 miles.

 

ENGINE BREAK-IN PROCEDURES:
"A proper and careful break-in period for a newly rebuilt engine is extremely important. The break-in procedures listed on the following page may seem excessive. However, an engine that has been broken in properly will see more power across the engine’s rpm range and longer service life than a comparable engine that has not. If using the old bearings, please note the difference in hours and mileage requirements for the break-in period.When breaking in any engine (race or stock), use a low ash content, mineral-based racing oil (20 w or 30 w). After the break-in period, change to a mineral or synthetic racing oil (30 w or 40 w)."

RACE ENGINE BREAK-IN PROCEDURES:
"Using a dynamometer for engine break-in is preferred. If you do not have access to a 'Dyno,' use the mileage break-in figures on the next page. The engine should first be run at idle for 30-45 minutes. During this time, be sure to check for leaks and keep an eye on the gauges. Ideally, for the first 100miles (depending on use of new or used bearings), avoid operating the engine above 5000 rpm or under heavy load.From 100-200 miles, gradually increase rpm, but never allow the engine to approach red line. Beyond 200 miles we recommend only short bursts of power approaching red line for 100 miles. At this point, change the break-in engine oil. The engine break-in period is now complete."

TIME AND MILEAGE RECOMMENDATIONS:
............................DYNO HRS..................................MILEAGE
RPM.......New Bearings.....Old Bearings.........New Bearings.....Old Bearing
1500......0.5....................----......................----....................----
2000......0.5....................0.5.............. ........----....................----
2500......0.5....................----......................----....................----
3000......0.5............. ......----.....................----.....................----
4000......1.0................... 0.5......................----.....................----
5000......1.0................... 0.5......................60......................----
6000......1.5....................0.5.............. ........60.....................25
6500......1.5....................0.5.............. ........----....................----
7000......----................... ----.....................60......................25
8000......----................... ----.....................60......................25
8500......----................... ----.....................60......................25
TOTAL.....7.0................... 2.5.....................300.....................00

 

Can't even read that chart its all over the place..and I wouldnt use a 20 or 30w depending on where you are..I would just buy Amsoil Break in oil or Royal Purple break in oil.

 

So I should wait to boost it? Its a 12a and I'm going to make my mani anyways, so if I break in without boost, I can gather all the parts for the turbo setup and it'll be broken in by the time Im ready to boost it.

 

Yeah..said in my post don't boost it until its broken in.

 

yep, that's a good plan, break it in and then put turbo on

 

So is the break in the same for a street car as a race car? The one above says for race car... just wondering lol

 

I thought break-ins were pretty straight forward. New oil, don't beat on the engine for about 500 miles, change the oil, continue not to beat on the engine for another 500 or so, change the oil one last time, and break-in is finished.

To be fair I've never had to break-in a new/rebuilt engine though so this is speculation.

 

well, the one above is a 300 mile break-in.. i havent ever had to break an engine in, and i dont want to do it wrong lol.. the only reason i ask is because i have heard so many different procedures that im not so sure on which one to follow lol

 

I normally make low boost on an engine the same day of its initial start up. Of course doing light shake downs to check for leaks, and put a heat cycle through the motor.

I would only give a motor special treatment if it has any new bearings in the assembly.

 

It will have new bearings. The ones that are in it now are showing lots of copper/brass