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Old 07-17-2007, 10:31 AM   #1
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Turbo Engine Break-in Question

What do people usually do about tuning during the engine break-in period?

I know it's important to stay out of boost during engine break-in, but a good tune for that engine would still be necessary, right?

For instance, right now I am running a stock engine with the Roush turbo kit and Roush tune. Within the next year, I hope to be able to put together a new built engine so I can up the boost and get it tuned (I want to learn how to tune it myself with SCT PRP, but that's another story...). But when I put the new engine in the car, what would I do for tuning? Wouldn't a new tune be necessary, especially if I change the compression ratio? It seems like the chicken-and-egg problem: you need a good tune to safely drive the car around town to break in the engine (even off boost/no WOT), but you need to make some dyno runs to get a good tune...

Or am I just thinking about this too much, and the tune I have now would suffice for engine break-in?

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Old 07-17-2007, 10:37 AM   #2
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first off welcome to the forum

and how much power are you looking to make?

you will be able to drive the car with lower compression.
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Old 07-17-2007, 10:46 AM   #3
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Quote:
Originally Posted by tls_bmx View Post
first off welcome to the forum
Haha, thanks. I've been on Focaljet for awhile, but I just found this board. I remember you from there.

Quote:
Originally Posted by tls_bmx View Post
and how much power are you looking to make?
I haven't really decided on any definite power goals, probably start around high 200s. I was just curious what really is required to get a built engine in the car, tuning-wise, regardless of the power goals.

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you will be able to drive the car with lower compression.
Yes, but doesn't decreasing/increasing the compression require a re-tune? At which point I'm still back at the "how do you tune the engine?" question. If the engine setup changes, how do you re-tune it without subjecting the engine to dyno pulls?
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Old 07-17-2007, 04:55 PM   #4
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You should put it together without the turbo on it and get a couple of hundred miles on it then install the turbo and tune it.

I'm getting ready to put my motor back together and I plan to just drive it easy for a few days before I start building serious boost.

You should come down some time.... I'm only about 80 miles south of you on US23.... I'm in Piketon.
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Old 07-17-2007, 06:32 PM   #5
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Quote:
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Yes, but doesn't decreasing/increasing the compression require a re-tune? At which point I'm still back at the "how do you tune the engine?" question. If the engine setup changes, how do you re-tune it without subjecting the engine to dyno pulls?
yeah i was just saying you could drive it with the lowered compression until it is broken in and then tune it on the dyno.

john... when i build mine will it be ok to run my turbo on it as soon as i build it if i dont get into boost for a couple hundred miles? i dont have my stock exhaust manifold any more.
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Old 07-17-2007, 06:47 PM   #6
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Thanks for the replies. I've always been curious how this works. Running without the turbo makes sense... I just wasn't sure what kind of tune you loaded into the ECU during this period to drive it around town. Though I guess just keeping the turbo tune would probably work

This isn't something I'm going to attempt in the *near* future. I want to finish up my exhaust, and maybe pick up an SCT PRP and learn how to use it before I attempt something like this. I can't wait to get the stock cat off the car.

Sure, boost is fun, but half the fun of this car is just learning how things work! Maybe I'm just a nerd...
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Old 07-17-2007, 10:18 PM   #7
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Quote:
Originally Posted by 03OrangeSVT View Post
You should put it together without the turbo on it and get a couple of hundred miles on it then install the turbo and tune it.

I'm getting ready to put my motor back together and I plan to just drive it easy for a few days before I start building serious boost.

You should come down some time.... I'm only about 80 miles south of you on US23.... I'm in Piketon.
Yeah, you drive a car easy..... I know you will breaking that engine in with 15psi of boost! You know I always heard break an engine in the way it will be driven,......just kidding!
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Old 07-19-2007, 04:58 PM   #8
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drive her easy at first, then slowly start letting her stretch her legs more and more, but go slow with it
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Old 07-19-2007, 05:27 PM   #9
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I know you go easy on the car while driving, perhaps I poorly worded the original post.

My question is: what kind of tune do you typically load into the ECU during the break-in period? Since a good tune for your particular setup requires dyno tuning, you will not be running with said tune until you can actually get it on the dyno after the engine has a chance to break-in.
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Old 07-19-2007, 06:26 PM   #10
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just run it stock with the stock tune until it is broken in then put the turbo on it and have it dyno tuned after it is broken in.
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