LT1-LT4 Modifications 1993-97 Gen II Small Block V8

new motor beak in

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Old Mar 31, 2014 | 10:57 AM
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Default new motor beak in

Doing a rebuild on my lt1, it's a used block but it's been machined and cleaned. Purchased a full rebuild kit from O'riellys, using my old heads. What's the best way to break in the motor from first start to being good for full throttle?
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Old Mar 31, 2014 | 10:59 AM
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Break it in how you're going to drive it.
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Old Mar 31, 2014 | 11:07 AM
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I was under the impression that you had to beat the **** out of your motor to seat the rings properly or you'll glaze the walls. But I guess it really depends on the type of rings.

That and change your oil a lot.

Last edited by Catmaigne; Mar 31, 2014 at 11:13 AM.
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Old Mar 31, 2014 | 11:33 AM
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I got a few hundred miles on mine with a base baby tune, lots of highway cruising with going 60 to 80mph slowly, decel and accel.

Then tossed on dyno and hit it with WG spring boost.
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Old Mar 31, 2014 | 01:13 PM
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what I do:

initial start up (do not use synthetic oil. regular dino 5-30 or even a "break-in oil like joe gibbs) and hold TB open to 2k rpm (stick a penny or something between return stop & TB) for 15-20 min. check for leaks and use a temp gun to monitor exhaust temps on headers/manifolds (if one is cold or stupid hot, shut off motor and find out why). This used to be principally done to set solid lifter cams/lifters but on hydraulic cam cars this is to really just get oil flowing well throughout motor

drain oil/change filter

go drive and hold in 2nd gear as RPM's get to 3500, decal. do this 5 times
continue drive in 2nd gear accel to 4500, decal 5 times

the above helps set the rings by loading the pistons on both accel & decal

now drive it "normal" without sustaining a constant speed for long for 500 mi.

drain oil/filter

drive as easy or hard as you want, change oil/filter in 1500 mi

do routine oil/filter changes
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Old Mar 31, 2014 | 03:02 PM
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Originally Posted by ******
what I do:

initial start up (do not use synthetic oil. regular dino 5-30 or even a "break-in oil like joe gibbs) and hold TB open to 2k rpm (stick a penny or something between return stop & TB) for 15-20 min. check for leaks and use a temp gun to monitor exhaust temps on headers/manifolds (if one is cold or stupid hot, shut off motor and find out why). This used to be principally done to set solid lifter cams/lifters but on hydraulic cam cars this is to really just get oil flowing well throughout motor

drain oil/change filter

go drive and hold in 2nd gear as RPM's get to 3500, decal. do this 5 times
continue drive in 2nd gear accel to 4500, decal 5 times

the above helps set the rings by loading the pistons on both accel & decal

now drive it "normal" without sustaining a constant speed for long for 500 mi.

drain oil/filter

drive as easy or hard as you want, change oil/filter in 1500 mi

do routine oil/filter changes
Interesting? I wonder how this work with a turbo car.

SNM chime in!

A guy was telling to do 1k before I put it into boost! Your thoughts???
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Old Mar 31, 2014 | 03:08 PM
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Originally Posted by SwampWS6
Interesting? I wonder how this work with a turbo car.

SNM chime in!

A guy was telling to do 1k before I put it into boost! Your thoughts???
Let it idle for a bit, check for leaks etc, then go drive it.

I did nothing out of normal grandma driving for a few hundred miles as pointed out above.

To each their own.
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Old Mar 31, 2014 | 03:27 PM
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Its not a old school motor that the lifters need to seat etc. Its a hydralic roller camshaft, while you build it use lube on cam.lifters,rockers. Add oil, prime before installing intake. Finish engine,fill fluids and start.

2 heat cycles first one shut it off after 15 minutes of idle and re check all the bolts you can. Restart and check and recheck for leaks. Make sure your fan is cycling before test drive. Drive 500 miles change oil. Drive it like you stole it. Use a good oil filter like a wix filter, i like to swap filter after 100miles and add .5 qt oil. Thats when most shavings will be released.
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Old Mar 31, 2014 | 05:31 PM
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The moment your motor fires up you have ring seal, just run it for 30 mins and change the oil. Lulz @ baby tune, if you need a baby tune then you musten be confident in your engine building skills...
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Old Mar 31, 2014 | 06:11 PM
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Originally Posted by DUDCOUPE
The moment your motor fires up you have ring seal, just run it for 30 mins and change the oil. Lulz @ baby tune, if you need a baby tune then you musten be confident in your engine building skills...
Baby tune indeed, you must not be confident your inflated dyno numbers are actually gonna show real life track results.
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Old Mar 31, 2014 | 07:31 PM
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You have no idea lol, youll find out give me some time to set my suspension. And remember im full weight plus my myself (far from skinny)
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Old Mar 31, 2014 | 07:34 PM
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Oh I have prepared myself for the slew of excuses we will hear...
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Old Mar 31, 2014 | 07:49 PM
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What excuse did i have last time? You bringing your car to the rental in a month? Got a 302 with a lil power adder lookin for action, you sit better than him on paper also
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Old Mar 31, 2014 | 07:52 PM
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Originally Posted by DUDCOUPE
Lulz @ baby tune, if you need a baby tune then you musten be confident in your engine building skills...
If you had a turbo car you would understand. Its not like your N/A car needs a baby tune. You need everything you can get outta your motor. Smart Guy!
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Old Mar 31, 2014 | 07:53 PM
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And must turbo cars need everything outta them cause theyre nuggets
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Old Mar 31, 2014 | 07:56 PM
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Originally Posted by DUDCOUPE
And must turbo cars need everything outta them cause theyre nuggets
All talk, all nonsense.

Run your car not your mouth, street racer.
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Old Mar 31, 2014 | 07:58 PM
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Originally Posted by DUDCOUPE
And must turbo cars need everything outta them cause theyre nuggets
Why must you start ****? Are you jealous or do you not have the $$$ to do anything better with your setup?

From the sound of it,
Originally Posted by DUDCOUPE
(far from skinny)
You will need some type of FI or 500 shot to get moving bro........
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Old Mar 31, 2014 | 07:58 PM
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I like to do both . Your mad cause you wouldnt be able to do **** on teh street from a dig..
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Old Mar 31, 2014 | 08:02 PM
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Originally Posted by SwampWS6
Why must you start ****? Are you jealous or do you not have the $$$ to do anything better with your setup?
this is the internet, if you dont take it seriously youll never make it out alive...
I have the coin, just figurin out my next setup that will habe over inflated numbas
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Old Mar 31, 2014 | 08:05 PM
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Originally Posted by DUDCOUPE
I like to do both . Your mad cause you wouldnt be able to do **** on teh street from a dig..



I swear I didnt say anything about roll racing?

You worry about weight reduction (not the car).

And I will show what good 60ft looks like. With a M6
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