Break-in boost levels?

[OneLethal87GN]

Along with a newly rebuilt engine I also have a new turbo. Would running around 13 psi be too much for the new combo? I don't plan on driving hard until after the 1,000 miles are up, but ya never know when ya need to pass Grandma when she's cruising at 35 out in the country. BTW, this is a totally rebuilt engine with new aftermarket cam and springs and the turbo is a 60 series.

 

[slimtastic]

uhhhh. I dont think that you need a breakin period ona turbo,just as long as you have oil in the thing upon initial startup for the seals/bearings ect.

 

[Taffy]

I broke mine is at 26psig and it is a runs like a champ. Atleast it did when I took the car apart!

 

[OneLethal87GN]

I guess I should have worded this differently. I wasn't concerned about breaking in the turbo, just the engine. I know you're not supposed to be hard on it for at least 500 miles, but you know how you sometimes need to be. I was referring to 13 psi as being too high or not for breaking in the newly rebuilt engine. I will try my best not to run it hard for at least 1,000 miles, but if the time comes to pass somebody who's driving too slow then I don't want to mess the new engine up by flooring it with too much boost. After the engine is broken in I will still try to keep my boost low... maybe around 20 psi or so.

 

[galoush]

There was a whole article on Engine break in s on here once . Very interesting it basicly said a hard break in is better as it seals the rings properly .A properly built motor is going to stay together and the easy break in has no merits . Im not an engine guru but maybe someone else has some info . . Anyone have any ideas ? I found the site under a yahoo search " Engine Break in " its MototuneUSA . I tried posting the link but couldnt get it to go . SDPC recomends a 300-500 mile break in so ?????

 

[OneLethal87GN]

I've seen two opinions on break-in. The usual is to give it 500 miles of no more than 55 mph. A second guy said " if you're going to drive it hard anyways, drive it hard to start with or you may shell-shock it." Maybe those aren't his exact words, but very close. Most say to drive easy to break in the rings, therefore I wanted opinions on a good soft boost level. My engine was done by a guy who has been building race engines for years. He said he has done a boosted Buick before. Also, is it very critical to break-in the new cam for 20 minutes? I didn't on my last engine rebuild and everything was fine. Along with the new Comp Cams 206/206 I matched it with new Comp Cams 980 springs. I just don't want a wiped lobe. I want to be finished under the hood and start on the paint/bodywork and some new rims would be nice too.

 

[slimtastic]

i would tend to agree with the break in hard statment. the only way to seal piston rings effectivly is to make cylinder pressure....and lots of it. and i think that your engine would be the strongest upon the first start too. of course if you run a tappet cam then a 20 minute breakin at 2000 typically is the norm. but if its a roller cam then just get oil pressure and go.

 

[OneLethal87GN]

It's a flat tappet cam. The guy who did the rebuild wants to just fire up the engine and go. I will tell the guy installing the engine to break it in properly though. This will be a street driven car that may see the track only once or twice in its lifetime so I want it to hold up for several years. This is also why I only plan to run around 20 psi with low timing on alky. 20 psi with a TE-63-1 and all my other mods should be enough to hold my own if something should try me.