Break in Question

joker · 02-01-2005, 10:18 AM

I have read a good bit on the internet about new engine break in procedure, and would like to everyones opinion on the matter. Basically from what I have gathered on the internet, there are two schools of though on the subject. The main purpose for both being that they allow the rings and valves to seat better, thus making for a more efficient, and powerfull engine.

1) Take it easy on the engine, limiting rpms for a certain number of miles, then raise the max rpms you drive at for another period of mileage.

not literall numbers but for example)
(rpms< 3500 for 500 miles, rpms<4500 for 500 to 1000 miles

2)A more controversial way of doing it is gradually stepping up the rpms and throttle follwed by a brief cool down period

ie 3 runs at 30% throttle, 15 minute cool down in between each
3 runs at 60% throttle cool down between each
3 runs at 60% to 100% throttle with a cool down in between

With method number two, the engine is broken in with very little actuall miles on it, while number one takes much longer. Which in your opinion is the better procedure

asilver2001gt · 02-01-2005, 11:42 AM

We've always broken in our vehicles according to method #1. The cars normally see 50-60% throttle, and never go over 60 mph for the first 500 miles. Kind of a pain in the ass but just trying to protect a huge expense. After that, its time to open the bitch up

Sendero · 02-01-2005, 11:53 AM

For some reason I don't think that Ford puts more than 10 "miles" of runtime on a new motor. I know for a fact that Cobra engines see dyno time directly after 10 minutes of breakin.

EZ SPEED · 02-01-2005, 12:17 PM

All the motors I have built have been full throttle by the time they had 400 miles on them if not sooner. It works for me.

I have only built about 15-18 engines, but I always change the oil at 500 miles and again at 1500 miles then at 3000 and every 3000 after that.

Wicked · 02-01-2005, 04:21 PM

Quote:

Originally Posted by KB ZILLA

All the motors I have built have been full throttle by the time they had 400 miles on them if not sooner. It works for me.

I have only built about 15-18 engines, but I always change the oil at 500 miles and again at 1500 miles then at 3000 and every 3000 after that.

When I built my 89. I had 100 miles on it and the builder told me that was plenty since it was a roller motor.

A roller cam and OHC motor has no flat lifters to wear in.

For initial break in on my 89 I did the normal 20 minutes at 1500-2000rpm. I also took it easy for the first 100, then less easy for the next 500.

The main thing with "break in" is the engine will loosen up(less frictional loss due to new rings/bearings) as well as become more efficient over the next 5000 miles or more.

Italian LX · 02-01-2005, 04:24 PM

Quote:

Originally Posted by KB ZILLA

All the motors I have built have been full throttle by the time they had 400 miles on them if not sooner. It works for me.

Refresh my memory. . . how many miles did you get out of your stock '03 Lightning motor?

coupe · 02-01-2005, 04:28 PM

Quote:

Originally Posted by Italian LX

Refresh my memory. . . how many miles did you get out of your stock '03 Lightning motor?

EZ SPEED · 02-01-2005, 06:07 PM

Quote:

Originally Posted by Italian LX

Refresh my memory. . . how many miles did you get out of your stock '03 Lightning motor?

I knew you were gonna say that....

I DID NOT build it...DUMBASS...read what we are talking about

Italian LX · 02-01-2005, 07:59 PM

Quote:

Originally Posted by KB ZILLA

I knew you were gonna say that....

I DID NOT build it...DUMBASS...read what we are talking about

I know, but i wouldn't want to let you down.

Craig K. · 02-01-2005, 08:35 PM

Every new car is at full throttle under light load with-in the first 10 minutes of run time, it's called a chassis roll test, very similiar to a chassis dyno, how not a heavy load. This checks for engine/transmission/brake system operation. Usual roll test last anywhere between 3-5 minutes, and out of all the car plants I have been to (about 15 of them) I have yet to see an operator not go to a full, or near full throttle on these testers.

My school of thought is gradualy RPM increases, then cost downs in gear. IE drive at 2000 to 2500 to 3000, to 3500 for about 30 to 60 seconds at each, then after 3500, cost back down to around 1500, then repeat, do this for about 50 - 100 miles.

After that, run the engine under 3500-4000 for the first 500 miles, then change the oil. Then as Eric said, change it after another 1000 miles. Also when you change it the first time, use the oil that your going to use in it, such as Mobil 1 , and use a good oil filter, such as the Mobil 1 filter. If I am building the engine, then I assemble it with Mobil 1

02-01-2005, 11:42 AM	#2
asilver2001gt Dr Rob Join Date: Dec 2004 Location: my car is flat out retarded and lee likes it! Posts: 1,193	Re: Break in Question We've always broken in our vehicles according to method #1. The cars normally see 50-60% throttle, and never go over 60 mph for the first 500 miles. Kind of a pain in the ass but just trying to protect a huge expense. After that, its time to open the bitch up __________________ 2007 Z06--Bone Stock LS7 overpriced piece of plastic with a big ass motor 2006 Trailblazer SS: TrickFlow 215's Comp Cam 591/598 Fast 102 FLT Level VI The DD

02-01-2005, 11:53 AM	#3
Sendero Im gonna show her my... Join Date: Dec 2004 Location: Somewhere providing FREE tech support. Posts: 4,269	Re: Break in Question For some reason I don't think that Ford puts more than 10 "miles" of runtime on a new motor. I know for a fact that Cobra engines see dyno time directly after 10 minutes of breakin. __________________ I heard it on the internet, so it must be true. "I believe that a person's moral compass can be determined by how he references free men the right to defend themselves." T. Nugent "An armed society is a polite society. Manners are good when one may have to back up his acts with his life." R. Heinlein "Never argue with an idiot. They drag you down to their level, then beat you with experience." -Unknown

02-01-2005, 12:17 PM	#4
EZ SPEED Friends Join Date: Dec 2004 Location: Tempe Arizona Posts: 3,029	Re: Break in Question All the motors I have built have been full throttle by the time they had 400 miles on them if not sooner. It works for me. I have only built about 15-18 engines, but I always change the oil at 500 miles and again at 1500 miles then at 3000 and every 3000 after that. __________________ 2020 Range Rover Sport HSE P525 Dynamic - Firenze Red - Supercharged 5.0 - 518 HP SOLD - 2010 Camaro SS [/B] - Featured in GM High Tech Performance and Camaro Now Magazines - http://www.superchevy.com/features/g...of-perfection/

02-01-2005, 08:35 PM	#10
Craig K. Nothing new here Join Date: Dec 2004 Location: Senoia, GA Posts: 2,990	Re: Break in Question Every new car is at full throttle under light load with-in the first 10 minutes of run time, it's called a chassis roll test, very similiar to a chassis dyno, how not a heavy load. This checks for engine/transmission/brake system operation. Usual roll test last anywhere between 3-5 minutes, and out of all the car plants I have been to (about 15 of them) I have yet to see an operator not go to a full, or near full throttle on these testers. My school of thought is gradualy RPM increases, then cost downs in gear. IE drive at 2000 to 2500 to 3000, to 3500 for about 30 to 60 seconds at each, then after 3500, cost back down to around 1500, then repeat, do this for about 50 - 100 miles. After that, run the engine under 3500-4000 for the first 500 miles, then change the oil. Then as Eric said, change it after another 1000 miles. Also when you change it the first time, use the oil that your going to use in it, such as Mobil 1 , and use a good oil filter, such as the Mobil 1 filter. If I am building the engine, then I assemble it with Mobil 1 __________________ 1974 Triumph TR6 1985 Monte Carlo SS 1986 Mustang GT 2011 KIA Optima GTS

02-01-2005, 10:18 AM	#1
joker Friends Join Date: Dec 2004 Location: Southern Colorado Posts: 2,452	Break in Question I have read a good bit on the internet about new engine break in procedure, and would like to everyones opinion on the matter. Basically from what I have gathered on the internet, there are two schools of though on the subject. The main purpose for both being that they allow the rings and valves to seat better, thus making for a more efficient, and powerfull engine. 1) Take it easy on the engine, limiting rpms for a certain number of miles, then raise the max rpms you drive at for another period of mileage. not literall numbers but for example) (rpms< 3500 for 500 miles, rpms<4500 for 500 to 1000 miles 2)A more controversial way of doing it is gradually stepping up the rpms and throttle follwed by a brief cool down period ie 3 runs at 30% throttle, 15 minute cool down in between each 3 runs at 60% throttle cool down between each 3 runs at 60% to 100% throttle with a cool down in between With method number two, the engine is broken in with very little actuall miles on it, while number one takes much longer. Which in your opinion is the better procedure