View Poll Results: How do you break-in your rebuild engine
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Rebuild is finally done!
10-20-2005, 09:31 AM
#1
Race Car
Thread Starter
Rebuild is finally done!
Full engine rebuild just completed. Upgraded to Vitesse software from my LR MAF kit, went MBC, 55# injectors, new(er) stock turbo, new Cup clutch. What is everyone doing for a break-in?
10-20-2005, 12:43 PM
#2
Three Wheelin'
Assuming you did rings etc, valve seats?
I use NAPA Non detergent 10W30 for the first 500 miles.
Keep it under 4,000 rpms for the first 500 miles. Then let her rip.
Different opinions on the keep it off boost, my latest rebuilt engine hit boost in the first 5 minutes
When I built 2200 engines a day, yes a day, we pulled 3 engines a day and put them on the dyno for a 10 hour quality run. They ran all way up to 6,000 RPM's, under load, for up to 3 hours and were the best engines you could ever buy. Mercedes actually charged more for the "broken in" test engines because they were broken in under the correct load conditions.
Anyone in the Rennlist realm do test stand engine break ins? What is the charge for something like that?
I use NAPA Non detergent 10W30 for the first 500 miles.
Keep it under 4,000 rpms for the first 500 miles. Then let her rip.
Different opinions on the keep it off boost, my latest rebuilt engine hit boost in the first 5 minutes
When I built 2200 engines a day, yes a day, we pulled 3 engines a day and put them on the dyno for a 10 hour quality run. They ran all way up to 6,000 RPM's, under load, for up to 3 hours and were the best engines you could ever buy. Mercedes actually charged more for the "broken in" test engines because they were broken in under the correct load conditions.
Anyone in the Rennlist realm do test stand engine break ins? What is the charge for something like that?
10-20-2005, 01:14 PM
#3
Pro
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take it easy for a few miles, do a few hard pulls to get the rings to ware in then take easy a few hundred miles.
I will be having my engine broken in on the dyno when it is being tuned.
I will be having my engine broken in on the dyno when it is being tuned.
10-20-2005, 01:48 PM
#4
Three Wheelin'
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I'd say take it easy a few miles to get the oil/coolant up to temp and then do a couple hard pulls and a bit of mixed rpm driving then go home after about 50 miles and change the oil (to same oil used first 50 miles) - there should be a decent amount of metal in there after those first few miles, then drive at varying rpms till somewhere in the 500-1000 miles range then change the oil to whatever you want to use and drive normally...
10-20-2005, 02:15 PM
#5
Instructor
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the shop that rebuilt my engine drove the **** out of it for a short period and then told me to keep it under 4,000 rpms for the first 500 miles, under 5,000 rpms for the next 500 and keep off full boost for 1,5000 miles then turn it loose...just under the 1,000 mile mark at the moment
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10-21-2005, 12:39 PM
#8
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I don't have much advice as I have heard about every method under the sun with no empirical data to support. I will congratulate you on your accomplishment. I wish you the best of luck in getting it on the road.
10-21-2005, 05:08 PM
#9
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Anyone ever heard of the MotoMan hard break-in procedure?
http://www.mototuneusa.com/break_in_secrets.htm
http://www.mototuneusa.com/break_in_secrets.htm
10-21-2005, 05:25 PM
#10
Drive-by provocation guy
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My mech has about 20+ years exp on street and race cars, Porsche only shop, etc.
After mine was done (rings also) he said keep under 5K and little boost for first month or so, then drive it like ya stole it. Just enough for the rings to seat.
He said if I did not have rings done there is no need for break in.
After mine was done (rings also) he said keep under 5K and little boost for first month or so, then drive it like ya stole it. Just enough for the rings to seat.
He said if I did not have rings done there is no need for break in.
10-21-2005, 05:40 PM
#11
8th Gear
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Originally Posted by toddk911
My mech has about 20+ years exp on street and race cars, Porsche only shop, etc.
After mine was done (rings also) he said keep under 5K and little boost for first month or so, then drive it like ya stole it. Just enough for the rings to seat.
He said if I did not have rings done there is no need for break in.
After mine was done (rings also) he said keep under 5K and little boost for first month or so, then drive it like ya stole it. Just enough for the rings to seat.
He said if I did not have rings done there is no need for break in.
After that .. drive it as you wished from a beginins ..
10-22-2005, 02:28 AM
#12
Rennlist Member
Two motors. 30 grand each. Second one with 10 grand of incidentals. First one, rode gently for the first 1,000 miles an then let her rip. At 3,000 miles, dynoed it and came up with 409 whp. I was upset. Thought it should be faster. A month later, blew the motor, literally melting the piston racing around Vegas.
Second motor. Drove it gently around town for about 20 miles as soon as I picked it up. Never went over 3,000 rpm. Drove it from Scottsdale AZ to Vegas (about 360 miles) and never went over 3,000 rpm's the whole way. Immediately changed the oil and to this day change the oil every 500 to 1,000 miles.
Up to 1,000 miles. Never went over 3,000 rpm's. Almost no boost.
Up to 2,000 miles. Never went over 4,000 rpm's. Low boost
Up to 2700-2800 miles, kept it under 5,000-5,500 rpms.
Turned up the boost to 3,000 miles and got on it a bit more.
Dynoed it at 3,000 miles and first two runs without load registered over 500 whp.
Third and final load run done with 480whp.
Two motors, built exactly the same way by the same person.
Finally about 1,500 miles after I dynoed it, the motor set even more and turned down the boost to accomodate the extra power. So it's faster now than when it was dynoed. Just have to get it back there and see where it's at. I read the link obove on Moto Man and it makes sense.This is just my personal experience. Hell, I'll take a quick pic of the piston I melted. I kept it as a conversation piece, paper weight, etc.
Second motor. Drove it gently around town for about 20 miles as soon as I picked it up. Never went over 3,000 rpm. Drove it from Scottsdale AZ to Vegas (about 360 miles) and never went over 3,000 rpm's the whole way. Immediately changed the oil and to this day change the oil every 500 to 1,000 miles.
Up to 1,000 miles. Never went over 3,000 rpm's. Almost no boost.
Up to 2,000 miles. Never went over 4,000 rpm's. Low boost
Up to 2700-2800 miles, kept it under 5,000-5,500 rpms.
Turned up the boost to 3,000 miles and got on it a bit more.
Dynoed it at 3,000 miles and first two runs without load registered over 500 whp.
Third and final load run done with 480whp.
Two motors, built exactly the same way by the same person.
Finally about 1,500 miles after I dynoed it, the motor set even more and turned down the boost to accomodate the extra power. So it's faster now than when it was dynoed. Just have to get it back there and see where it's at. I read the link obove on Moto Man and it makes sense.This is just my personal experience. Hell, I'll take a quick pic of the piston I melted. I kept it as a conversation piece, paper weight, etc.
