Today was the last day of school and after school 2 88's and a 94 5.0 mustang were doing burnouts and donuts, being the only one there that has a Z28 I couldnt let them do that and me not do anything...The stupid part is that i just put the brand new 350 in my car and it has a like a whopping 60miles on it... I did a burnout and a couple donuts, and i didnt hurt the car or the engine but was this really stupid for me to do? I doubt the rings have even sealed or anything and heres stupid me doin burnouts etc. Do you think it was stupid should I have just waited til I had more miles, or do you think its not that big of a deal and it wont hurt anything? Its just so tempting when my cars been down for 6months and theres stangs doing burnouts and stuff.

 

Depends on the parts but I would say you're pretty accurate with the whole moron thing . Roller cam engines with stock internals aren't really a break in kind of motor, they are pretty much indestructable. You probably didn't do any harm but I wouldn't have even taken my engine up to 4000rpm before I went 500miles and changed the oil. I also think turning on the car and keeping it at 2000rpm on a cold start is a good idea because you get the best oil flow to the bearings.
Don't loose any sleep over it but don't do it again until you've got the normal 500 miles on it. Also don't forget to change/check the oil frequently before the 500 miles is up!

 

jessss- I took my up to 6000 with only 200 miles on it.

granted it's a racecar with only limited service life, but sometimes you have to enjoy the fruits of your labor much sooner than later.

I bet you 9 out of 10 folks on this list have done the same thing with there new motors.



Ron

 

Well it isnt' going to hurt you too much unless you went to redline and stayed there for a long period of time. your rings are the only things you have to worry about and you shouldn't worry about those too much. Hell if it is going to come apart it is going to come apart one way or the other.

 

I know what everyone says about break in. How do you suppose those guys with race cars do it? I did the 20 minute thing with mine, took her down the road for 1 mile, turned left and TURNED it loose. 1st time 6000 the next time 6200. Got 4000 miles on it now, dosen't leak or use oil. Wouldn't do it on a chrome ring engine, but I wouldn't use um anyways.

 

They polish the bores and don't worry about oil control rings. The engine is coming apart after 15-20 races anyway. The big boys (Winston Cup) generally get 2-3 races on an engine, if it's a backup. If their engines start burning oil after 500 miles, they really don't care. Unless you have a support truck following you with a few spare engines, I'd follow the recommended break in procedures.

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If you were truly a moron, would you have the cognitive ability to contemplate whether or not you were? Just askin'.

 

Yes u were a moron

Ego's have a way of getting the best of us at times, but with time will come the ability to control such urges to prove who's the bigger dummy.

IMO kids with ego's shouldn't have powerful cars. Think of the damage you guys could have caused and the consequences that come with it.

Don't be dumb.....

:lala:

 

YEEEEEEP !

 

hey well its not to good but at this point, you've already done it, so live with it and dont sweat it too much you have to open it up occasionally just so that the motor dosent get set at a certain RPM and want to run it all the time. anyway just my 2

 

Vader says:

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If you were truly a moron, would you have the cognitive ability to contemplate whether or not you were? Just askin'.

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Thats great!

 

Vader says:

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If you were truly a moron, would you have the cognitive ability to contemplate whether or not you were? Just askin'.

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Thats great!

 

you probably didnt hurt it , but i would definately refrain from any more "fun" for a little while. The rings/bore need to seat into eachother, and reving the hell out of it with a fresh bore isnt the best. The "big boys" break stuff in on the dyno, and yes, we do worry about oil control. If a pro stock motor uses oil, it will contaminate the charge, and the motor will lose power, and detonate, which is very destructive on 1. Also, we have a big helper with oil control, the dry sump system will pull a significant vacuum in the pan, which helps sealing ALOT. On some motors, we run an a.i.r. pump plumbed into the valve cover to pull even more. But DONT try this on a stock motor, too much vacuum with an internal pump leads to bearing and wrist pin problems. just my .02 worth.


vader, the moron thing was funny as hell.

 

I have to agree that i've done that to a new motor before. BUT.... if the motor was worth anything to me, like the 355 in my 89 i break it in religiously. i started it up, ran it for 45minustes, changed the oil. Ran it easy with a 3700 top rpm for around 400 miles, then changed the oil. I've only got maybe 500mi on it still. I've just got so much money in it i can't afford to destroy it!!!!

 

personally i wouldnt of done that...even if i did i wouldnt worry about it to much. My uncle is a proffesional engine builder, his technique of breaking in an engine is a little different....

He just puts it in whatever vehicle its going in, runs it up to peak torque, and lets the tires burn out. His theory is if something breaks then, then it was going to break eventually.

I think he gets away with that only because he puts a LOT of attention to quality with his stuff...

 

The first engine I rebuilt went into the Nissan truck I had. Yeah, only a 4 banger but you gotta start somewhere Anyway, I had about 150 miles on it and for some reason, I just wanted to let it loose. Watched the tach go to about 4000 rpm and dumped the clutch weeeeeeee, both wheels were spinning and I was going sideways Still running strong to this day the new owner says... I looked at the mileage today and since the motor was put in, it's got about 50,000 miles on it. The Camaro engine on the other hand was broken in a bit more carefully except for the damn overheating when breaking in the cam clutch fan wasn't working right.